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      Ameren Combined 8-K dated March 14, 2007
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        STATES</font></div>
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        AND EXCHANGE COMMISSION</font></div>
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        D.C. 20549</font></div>
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                  8-K</font></div>
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        REPORT</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Pursuant
        to Section 13 or 15(d) of the</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Securities
        Exchange Act of 1934</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Date
        of
        report (Date of earliest event reported):</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font><a name="ReportDate"/></div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">March
                  9, 2007</font></div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>Commission
                  File Number</u></font></div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Exact
                  Name of Registrant as Specified in</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Charter;</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">State
                  of Incorporation;</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>Address
                  and Telephone Number</u></font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
              </td>
              <td align="justify" valign="top" width="27%" style="border-bottom: medium none;">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">IRS
                  Employer</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>Identification
                  Number</u></font></div>
              </td>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><a name="Jurisdiction"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">1-14756</font></a></div>
              </td>
              <td align="left" valign="top" width="30%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><a name="CFN"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Ameren
                  Corporation</font></a></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Missouri
                  Corporation)</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">1901
                  Chouteau Avenue</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">St.
                  Louis, Missouri 63103</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(314)
                  621-3222</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
              </td>
              <td align="justify" valign="top" width="27%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><a name="EIN"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">43-1723446</font></a></div>
              </td>
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              <td align="left" valign="top" width="28%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">1-3672</font></div>
              </td>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Central
                  Illinois Public Service Company</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Illinois
                  Corporation)</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">607
                  East Adams Street</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Springfield,
                  Illinois 62739</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(217)
                  523-3600</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
              </td>
              <td align="left" valign="top" width="27%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">37-0211380</font></div>
              </td>
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              <td align="left" valign="top" width="28%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">2-95569</font></div>
              </td>
              <td align="left" valign="top" width="30%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">CILCORP
                  Inc.</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Illinois
                  Corporation)</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">300
                  Liberty Street</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Peoria,
                  Illinois 61602</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(309)
                  677-5271</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
              </td>
              <td align="justify" valign="top" width="27%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">37-1169387</font></div>
              </td>
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              <td align="left" valign="top" width="28%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">1-2732</font></div>
              </td>
              <td align="left" valign="top" width="30%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Central
                  Illinois Light Company</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Illinois
                  Corporation)</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">300
                  Liberty Street</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Peoria,
                  Illinois 61602</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(309)
                  677-5271</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
              </td>
              <td align="justify" valign="top" width="27%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">37-0211050</font></div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="28%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">1-3004</font></div>
              </td>
              <td align="left" valign="top" width="30%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Illinois
                  Power Company</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Illinois
                  Corporation)</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">370
                  South Main Street </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Decatur,
                  Illinois 62523</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(217)
                  424-6600</font></div>
              </td>
              <td align="left" valign="top" width="27%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">37-0344645</font></div>
              </td>
            </tr>

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        Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">ITEM
        1.01</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Entry
        into a Material Definitive Agreement.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Ameren
        Corporation (&#8220;Ameren&#8221;) previously announced that certain of its subsidiaries had
        entered into a new, multi-year committed bank credit facility (see Current
        Report on Form 8-K filed February 13, 2007 (the &#8220;February 13 Form 8-K&#8221;)).
</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">After
        receipt of required regulatory approvals, effective March 9, 2007, Central
        Illinois Public Service Company, doing business as AmerenCIPS (&#8220;CIPS&#8221;), Central
        Illinois Light Company, doing business as AmerenCILCO (&#8220;CILCO&#8221;), and Illinois
        Power Company, doing business as AmerenIP (&#8220;IP&#8221; and collectively with CIPS and
        CILCO, the &#8220;Ameren Illinois Utilities&#8221;) became authorized to make borrowings and
        obtain letters of credit for their benefit under the $500 million multi-year,
        senior secured Credit Agreement, dated as of February 9, 2007 (the &#8220;2007 Credit
        Agreement&#8221;) described in the February 13 Form 8-K. A copy of the 2007 Credit
        Agreement was filed as Exhibit 10.1 to the February 13 Form 8-K. </font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">From
        March 9, 2007, IP is authorized to make borrowings and obtain letters of
        credit
        for its benefit up to $200 million under the 2007 Credit Agreement (in addition
        to the $150 million of authority it has under a Credit Agreement dated July
        14,
        2006 (the &#8220;2006 Illinois Credit Agreement&#8221;)). CIPS and CILCO will continue to
        have borrowing capacity of $135 million and $150 million, respectively, under
        the 2006 Illinois Credit Agreement, but each will have the option of permanently
        reducing its borrowing capacity under the 2006 Illinois Credit Agreement
        and
        shifting, in one or more transactions, such capacity to the 2007 Credit
        Agreement up to the same limits. Until such time as CIPS or CILCO elects
        to
        increase its borrowing capacity under the 2007 Credit Agreement and issue
        first
        mortgage bonds as security for its obligations thereunder (as described in
        the
        February 13 Form 8-K and below), it will not constitute a &#8220;Borrower&#8221; under the
        2007 Credit Agreement and will not be subject to the covenants thereof (except
        as a subsidiary of a Borrower). </font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">See
        the
        February 13 Form 8-K for a summary of the terms of the 2007 Credit Agreement
        applicable to the Ameren Illinois Utilities. Each of the Ameren Illinois
        Utilities has entered into a Supplemental Indenture providing for the issuance
        of mortgage bonds as security for its obligations under the 2007 Credit
        Agreement. Copies of such Supplemental Indentures are filed herewith as Exhibits
        4.2, 4.4 and 4.6.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">ITEM&#160;2.03
        </font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Creation
        of a Direct Financial Obligation or an Obligation under an Off-</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Balance
        Sheet Arrangement of a Registrant.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">See
        Item&#160;1.01 of the February 13 Form 8-K for a description of the 2007 Credit
        Agreement, a copy of which was attached thereto as Exhibit&#160;10.1 and is
        incorporated herein by reference. </font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">To
        secure
        its obligations under the 2007 Credit Agreement, CIPS has authorized the
        issuance of up to $135,000,000 of its First Mortgage Bonds, 2007 Credit
        Agreement Series (the &#8220;CIPS Credit Agreement Bonds&#8221;) under its Indenture of
        Mortgage and Deed of Trust dated October 1, 1941, as supplemented by the
        Supplemental Indenture dated as of March 1, 2007 (filed herewith as Exhibit
        4.2)
        (the &#8220;CIPS Mortgage&#8221;).</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">To
        secure
        its obligations under the 2007 Credit Agreement, CILCO has authorized the
        issuance of up to $150,000,000 of its First Mortgage Bonds, 2007 Credit
        Agreement Series (the &#8220;CILCO Credit Agreement Bonds&#8221;) under its Indenture of
        Mortgage and Deed of Trust, as supplemented by the Supplemental Indenture
        dated
        as of March 1, 2007 (filed herewith as Exhibit 4.4) (the &#8220;CILCO
        Mortgage&#8221;).</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">To
        secure
        its obligations under the 2007 Credit Agreement, IP has issued $200,000,000
        of
        its Mortgage Bonds, 2007 Credit Agreement Series (the &#8220;IP Credit Agreement
        Bonds, and together with the CIPS Credit Agreement Bonds and the CILCO Credit
        Agreement Bonds, the &#8220;Credit Agreement Bonds&#8221;) under its General Mortgage
        Indenture and Deed of Trust, as supplemented by the Supplemental Indenture
        dated
        as of March 1, 2007 (filed herewith as Exhibit 4.6) (the &#8220;IP Mortgage&#8221;).
</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
        IP
        Credit Agreement Bonds were issued and delivered, and the CIPS Credit Agreement
        Bonds and the </font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
      <div id="PGBRK" style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
        <div id="FTR">
          <div id="GLFTR" style="WIDTH: 100%" align="left">
          </div>
        </div>
        <div id="PN" style="PAGE-BREAK-AFTER: always">
          <div style="WIDTH: 100%; TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman">-3-</font></div>
          <div style="WIDTH: 100%; TEXT-ALIGN: center">
            <hr style="COLOR: black" noshade size="2">
          </div>
        </div>
        <div id="HDR">
          <div id="GLHDR" style="WIDTH: 100%" align="right">
          </div>
        </div>
      </div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">CILCO
        Credit Agreement Bonds will be issued and delivered to the extent such company
        increases its borrowing capacity under the 2007 Credit Agreement, to JPMorgan
        Chase Bank, N.A. as agent for the lenders under the 2007 Credit Agreement
        in
        order to evidence and secure the respective obligations of the Ameren Illinois
        Utilities under the 2007 Credit Agreement to make payments to the lenders
        under
        the 2007 Credit Agreement and to provide the lenders the benefit of the lien
        of
        the CIPS Mortgage, the CILCO Mortgage and the IP Mortgage, respectively,
        with
        respect to the applicable Credit Agreement Bonds.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
        obligation of each Ameren Illinois Utility to make payments with respect
        to
        principal under the 2007 Credit Agreement will not give rise to an obligation
        to
        pay principal of the respective Credit Agreement Bonds except on the maturity
        date of such Ameren Illinois Utility&#8217;s obligations under the 2007 Credit
        Agreement or upon redemption of such Credit Agreement Bonds. Upon the occurrence
        of a default and an acceleration of an Ameren Illinois Utility&#8217;s obligations
        under the 2007 Credit Agreement, and upon notice given by the agent to the
        respective trustee under the CIPS Mortgage, the CILCO Mortgage or the IP
        Mortgage, as the case may be, the Credit Agreement Bonds of the applicable
        Ameren Illinois Utility will be subject to immediate redemption in the amount
        of
        all obligations owed by such Ameren Illinois Utility under the 2007 Credit
        Agreement. </font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">If
        any
        Ameren Illinois Utility&#8217;s borrowing limit is permanently reduced under the 2007
        Credit Agreement, such Ameren Illinois Utility&#8217;s obligation under its Credit
        Agreement Bond will be deemed discharged to that extent. The obligation of
        each
        Ameren Illinois Utility to make payments with respect to the interest on
        its
        Credit Agreement Bonds will be satisfied and discharged to the extent that,
        at
        the time that any such payment shall be due, the then due interest and/or
        fees
        of such Ameren Illinois Utility under the 2007 Credit Agreement has been
        paid.
        If any payment is made on interest and/or fees of an Ameren Illinois Utility
        under the 2007 Credit Agreement, a corresponding payment obligation with
        respect
        to the interest or fees on the respective Credit Agreement Bonds shall be
        deemed
        discharged in the same amount.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
        Credit Agreement Bonds do not contain any provision regarding the release
        of the
        lien of the mortgage in the event of the retirement or redemption of all
        other
        mortgage bonds subject to the lien of the respective mortgage.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div><br>
      <div id="PGBRK" style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
        <div id="FTR">
          <div id="GLFTR" style="WIDTH: 100%" align="left">
          </div>
        </div>
        <div id="PN" style="PAGE-BREAK-AFTER: always">
          <div style="WIDTH: 100%; TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman">-4-</font></div>
          <div style="WIDTH: 100%; TEXT-ALIGN: center">
            <hr style="COLOR: black" noshade size="2">
          </div>
        </div>
        <div id="HDR">
          <div id="GLHDR" style="WIDTH: 100%" align="right">
          </div>
        </div>
      </div><br>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">ITEM
        9.01
        Financial Statements and Exhibits.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(d)
        Exhibits</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div>
        <table cellpadding="0" cellspacing="0" width="100%">

            <tr>
              <td align="left" valign="top" width="14%" style="border-bottom: medium none;">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>Exhibit
                  Number</u></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">:</font></div>
              </td>
              <td align="left" valign="top" width="20%" style="border-bottom: medium none;">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>Registrant(s):</u></font></div>
              </td>
              <td align="left" valign="top" width="46%" style="border-bottom: medium none;">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>Title</u></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">:</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="14%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">4.1
                  *</font></div>
              </td>
              <td align="left" valign="top" width="20%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Ameren;</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">CIPS</font></div>
              </td>
              <td align="left" valign="top" width="46%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Indenture
                  of Mortgage and Deed of Trust dated October 1, 1941, </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">from
                  CIPS to U.S. Bank National Association and Richard </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Prokosch
                  (successors to Continental Illinois National Bank and </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Trust
                  Company of Chicago and Edmond B. Stofft), as trustees, as </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">supplemented
                  (the &#8220;CIPS Mortgage&#8221;) (Annual Report on Form </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">10-K
                  for the year ended December 31, 2006, Exhibits 4.50 </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">through
                  4.63).</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="14%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">4.2
                  **</font></div>
              </td>
              <td align="left" valign="top" width="20%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Ameren;</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">CIPS</font></div>
              </td>
              <td align="left" valign="top" width="46%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Supplemental
                  Indenture dated as of March 1, 2007 to the CIPS </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Mortgage
                  relating to the First Mortgage Bonds, 2007 Credit </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Agreement
                  Series securing CIPS&#8217; obligations under the&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Credit</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Agreement,
                  </font><font size="2">dated as of February 9, 2007 (the "2007
                  Credit
                  </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font size="2">Agreement").</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="14%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">4.3
                  *</font></div>
              </td>
              <td align="left" valign="top" width="20%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Ameren;
                  CILCORP</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">CILCO</font></div>
              </td>
              <td align="left" valign="top" width="46%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Indenture
                  of Mortgage and Deed of Trust between Illinois Power </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Company
                  (predecessor in interest to CILCO) and Deutsche Bank </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Trust
                  Company Americas (formerly known as Bankers Trust </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Company),
                  as trustee, dated as of April 1, 1933, as supplemented </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(the
                  &#8220;CILCO Mortgage&#8221;) (Annual Report on Form 10-K for the </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">year
                  ended December 31, 2006, Exhibits 4.75 through 4.82).</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="14%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">4.4
                  **</font></div>
              </td>
              <td align="left" valign="top" width="20%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Ameren;
                  CILCORP</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">CILCO</font></div>
              </td>
              <td align="left" valign="top" width="46%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Supplemental
                  Indenture dated as of March 1, 2007 to the CILCO</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Mortgage
                  relating to the First Mortgage Bonds, 2007 Credit </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Agreement
                  Series securing CILCO&#8217;s obligations under the&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">2007
                  </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Credit
                  </font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Agreement.</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="14%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">4.5
                  *</font></div>
              </td>
              <td align="left" valign="top" width="20%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Ameren;</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">IP</font></div>
              </td>
              <td align="left" valign="top" width="46%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">General
                  Mortgage Indenture and Deed of Trust dated as of </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">November
                  1, 1992 between IP and BNY Midwest Trust </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Company
                  (successor to Harris Trust and Savings Bank), as </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">trustee,
                  as supplemented (the &#8220;IP Mortgage&#8221;) (Annual Report on </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Form
                  10-K for the year ended December 31, 2006, Exhibits 4.85 </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">through
                  4.95).</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="14%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">4.6
                  **</font></div>
              </td>
              <td align="left" valign="top" width="20%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Ameren;</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">IP</font></div>
              </td>
              <td align="left" valign="top" width="46%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Supplemental
                  Indenture dated as of March 1, 2007 to the IP </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Mortgage
                  relating to the Mortgage Bonds, 2007 Credit </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Agreement
                  Series securing IP&#8217;s obligations under the 2007 Credit </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Agreement.</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
            </tr>

        </table>
      </div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">*&#160;&#160;&#160;Incorporated
        by reference as indicated.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">**
        Filed
        herewith.</font></div><br>
      <div id="PGBRK" style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
        <div id="FTR">
          <div id="GLFTR" style="WIDTH: 100%" align="left">
          </div>
        </div>
        <div id="PN" style="PAGE-BREAK-AFTER: always">
          <div style="WIDTH: 100%; TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman">-5-</font></div>
          <div style="WIDTH: 100%; TEXT-ALIGN: center">
            <hr style="COLOR: black" noshade size="2">
          </div>
        </div>
        <div id="HDR">
          <div id="GLHDR" style="WIDTH: 100%" align="right">
          </div>
        </div>
      </div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">-
        - - - -
        - - - - - - - - - - - - - - - </font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">This
        combined Form 8-K is being filed separately by Ameren Corporation, Central
        Illinois Public Service Company, CILCORP Inc., Central Illinois Light Company
        and Illinois Power Company (each a &#8220;registrant&#8221;). Information contained herein
        relating to any individual registrant has been filed by such registrant on
        its
        own behalf. No registrant makes any representation as to information relating
        to
        any other registrant.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div><br>
      <div id="PGBRK" style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
        <div id="FTR">
          <div id="GLFTR" style="WIDTH: 100%" align="left">
          </div>
        </div>
        <div id="PN" style="PAGE-BREAK-AFTER: always">
          <div style="WIDTH: 100%; TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman">-6-</font></div>
          <div style="WIDTH: 100%; TEXT-ALIGN: center">
            <hr style="COLOR: black" noshade size="2">
          </div>
        </div>
        <div id="HDR">
          <div id="GLHDR" style="WIDTH: 100%" align="right">
          </div>
        </div>
      </div><br>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">SIGNATURES</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Pursuant
        to the requirements of the Securities Exchange Act of 1934, each registrant
        has
        duly caused this report to be signed on its behalf by the undersigned thereunto
        duly authorized. The signature for each undersigned company shall be deemed
        to
        relate only to matters having reference to such company or its
        subsidiaries.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">AMEREN
        CORPORATION</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Registrant)</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>/s/
        Jerre E.
        Birdsong&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
</u></font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 4.5pt">&#160;</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Jerre
        E.
        Birdsong</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Vice
        President and Treasurer</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">CENTRAL
        ILLINOIS PUBLIC SERVICE COMPANY</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Registrant)</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>/s/
        Jerre E.
        Birdsong&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</u></font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 4.5pt">&#160;</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Jerre
        E.
        Birdsong</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 333pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Vice
        President and Treasurer</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">CILCORP
        INC.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Registrant)</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>/s/
        Jerre E.
        Birdsong&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</u></font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 4.5pt">&#160;</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Jerre
        E.
        Birdsong</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Vice
        President and Treasurer</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">CENTRAL
        ILLINOIS LIGHT COMPANY</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Registrant)</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>/s/
        Jerre E.
        Birdsong&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</u></font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 4.5pt">&#160;</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Jerre
        E.
        Birdsong</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Vice
        President and Treasurer</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">ILLINOIS
        POWER COMPANY</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Registrant)</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>/s/
        Jerre E.
        Birdsong&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</u></font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 4.5pt">&#160;</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 333pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Jerre
        E.
        Birdsong</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 126pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Vice
        President and Treasurer</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 207pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Date:
        March 14, 2007</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div><br>
      <div id="PGBRK" style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
        <div id="FTR">
          <div id="GLFTR" style="WIDTH: 100%" align="left">
          </div>
        </div>
        <div id="PN" style="PAGE-BREAK-AFTER: always">
          <div style="WIDTH: 100%; TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman">-7-</font></div>
          <div style="WIDTH: 100%; TEXT-ALIGN: center">
            <hr style="COLOR: black" noshade size="2">
          </div>
        </div>
        <div id="HDR">
          <div id="GLHDR" style="WIDTH: 100%" align="right">
          </div>
        </div>
      </div><br>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Exhibit
        Index</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
      <div>
        <table cellpadding="0" cellspacing="0" width="100%">

            <tr>
              <td align="left" valign="top" width="14%" style="border-bottom: medium none;">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>Exhibit
                  Number</u></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">:</font></div>
              </td>
              <td align="left" valign="top" width="20%" style="border-bottom: medium none;">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>Registrant(s):</u></font></div>
              </td>
              <td align="left" valign="top" width="46%" style="border-bottom: medium none;">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>Title</u></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">:</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="14%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">4.1
                  *</font></div>
              </td>
              <td align="left" valign="top" width="20%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Ameren;</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">CIPS</font></div>
              </td>
              <td align="left" valign="top" width="46%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Indenture
                  of Mortgage and Deed of Trust dated October 1, 1941, </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">from
                  CIPS to U.S. Bank National Association and Richard </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Prokosch
                  (successors to Continental Illinois National Bank and </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Trust
                  Company of Chicago and Edmond B. Stofft), as trustees, as </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">supplemented
                  (the &#8220;CIPS Mortgage&#8221;) (Annual Report on Form </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">10-K
                  for the year ended December 31, 2006, Exhibits 4.50 </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">through
                  4.63).</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="14%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">4.2
                  **</font></div>
              </td>
              <td align="left" valign="top" width="20%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Ameren;</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">CIPS</font></div>
              </td>
              <td align="left" valign="top" width="46%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Supplemental
                  Indenture dated as of March 1, 2007 to the CIPS </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Mortgage
                  relating to the First Mortgage Bonds, 2007 Credit </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Agreement
                  Series securing CIPS&#8217; obligations under the&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Credit</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Agreement,
                  dated as of February 9, 2007 (the "2007 Credit</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font size="2">Agreement").</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="14%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">4.3
                  *</font></div>
              </td>
              <td align="left" valign="top" width="20%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Ameren;
                  CILCORP</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">CILCO</font></div>
              </td>
              <td align="left" valign="top" width="46%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Indenture
                  of Mortgage and Deed of Trust between Illinois Power </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Company
                  (predecessor in interest to CILCO) and Deutsche Bank </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Trust
                  Company Americas (formerly known as Bankers Trust </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Company),
                  as trustee, dated as of April 1, 1933, as supplemented </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(the
                  &#8220;CILCO Mortgage&#8221;) (Annual Report on Form 10-K for the </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">year
                  ended December 31, 2006, Exhibits 4.75 through 4.82).</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="14%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">4.4
                  **</font></div>
              </td>
              <td align="left" valign="top" width="20%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Ameren;
                  CILCORP</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">CILCO</font></div>
              </td>
              <td align="left" valign="top" width="46%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Supplemental
                  Indenture dated as of March 1, 2007 to the CILCO </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Mortgage
                  relating to the First Mortgage Bonds, 2007 Credit </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Agreement
                  Series securing CILCO&#8217;s obligations under the&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">2007
                  </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Credit
                  </font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Agreement.</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="14%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">4.5
                  *</font></div>
              </td>
              <td align="left" valign="top" width="20%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Ameren;</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">IP</font></div>
              </td>
              <td align="left" valign="top" width="46%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">General
                  Mortgage Indenture and Deed of Trust dated as of </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">November
                  1, 1992 between IP and BNY Midwest Trust </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Company
                  (successor to Harris Trust and Savings Bank), as </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">trustee,
                  as supplemented (the &#8220;IP Mortgage&#8221;) (Annual Report on </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Form
                  10-K for the year ended December 31, 2006, Exhibits 4.85 </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">through
                  4.95).</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="14%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">4.6
                  **</font></div>
              </td>
              <td align="left" valign="top" width="20%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Ameren;</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">IP</font></div>
              </td>
              <td align="left" valign="top" width="46%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Supplemental
                  Indenture dated as of March 1, 2007 to the IP </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Mortgage
                  relating to the Mortgage Bonds, 2007 Credit </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Agreement
                  Series securing IP&#8217;s obligations under the 2007 Credit </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Agreement.</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
            </tr>

        </table>
      </div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">*&#160;&#160;&#160;
        Incorporated by reference as indicated.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">**&#160;
        Filed herewith.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman">-8-<br></font></div>
    </div>
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[{"type": "8-K", "sequence": "1", "filename": "ameren8k031407.htm", "description": "AMEREN COMBINED 8-K DATED MARCH 14, 2007", "secsgml_size_bytes": 90216}]
[{"company-data": {"conformed-name": "AMEREN CORP", "cik": "0001002910", "assigned-sic": "4931", "irs-number": "431723446", "state-of-incorporation": "MO", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-14756", "film-number": "07693345"}, "business-address": {"street1": "1901 CHOUTEAU AVE", "street2": "MC 1370", "city": "ST LOUIS", "state": "MO", "zip": "63166-6149", "phone": "314-621-3222"}, "mail-address": {"street1": "1901 CHOUTEAU AVE", "street2": "MC 1370", "city": "ST LOUIS", "state": "MO", "zip": "63103"}}, {"company-data": {"conformed-name": "ILLINOIS POWER CO", "cik": "0000049816", "assigned-sic": "4931", "irs-number": "370344645", "state-of-incorporation": "IL", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-03004", "film-number": "07693346"}, "business-address": {"street1": "500 S 27TH ST", "street2": "C/O HARRIS TRUST & SAVINGS BANK", "city": "DECATUR", "state": "IL", "zip": "62525-1805", "phone": "2174246600"}, "mail-address": {"street1": "500 SOUTH 27TH STREET", "city": "DECATUR", "state": "IL", "zip": "62521"}, "former-company": {"former-conformed-name": "ILLINOIS IOWA POWER CO", "date-changed": "19660822"}}, {"company-data": {"conformed-name": "CENTRAL ILLINOIS LIGHT CO", "cik": "0000018651", "assigned-sic": "4931", "irs-number": "370211050", "state-of-incorporation": "IL", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-02732", "film-number": "07693347"}, "business-address": {"street1": "300 LIBERTY ST", "city": "PEORIA", "state": "IL", "zip": "61602", "phone": "309-677-5230"}, "mail-address": {"street1": "300 LIBERTY STREET", "city": "PEORIA", "state": "IL", "zip": "61602"}}, {"company-data": {"conformed-name": "CILCORP INC", "cik": "0000762129", "assigned-sic": "4931", "irs-number": "371169387", "state-of-incorporation": "IL", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "002-95569", "film-number": "07693348"}, "business-address": {"street1": "300 LIBERTY ST", "street2": "STE 300", "city": "PEORIA", "state": "IL", "zip": "61602", "phone": "309-677-5230"}, "mail-address": {"street1": "300 LIBERTY STREET", "city": "PEORIA", "state": "IL", "zip": "61602"}}, {"company-data": {"conformed-name": "CENTRAL ILLINOIS PUBLIC SERVICE CO", "cik": "0000018654", "assigned-sic": "4931", "irs-number": "370211380", "state-of-incorporation": "IL", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-03672", "film-number": "07693349"}, "business-address": {"street1": "607 E ADAMS ST", "city": "SPRINGFIELD", "state": "IL", "zip": "62739", "phone": "217-523-3600"}, "mail-address": {"street1": "CENTRAL ILLINOIS PUBLIC SERVICE CO", "street2": "607 E ADAMS ST", "city": "SPRINGFIELD", "state": "IL", "zip": "62739"}}]
Ameren Combined 8-K dated March 14, 2007
UNITED
        STATES
SECURITIES
        AND EXCHANGE COMMISSION
Washington,
        D.C. 20549
FORM
                  8-K
CURRENT
        REPORT
Pursuant
        to Section 13 or 15(d) of the
Securities
        Exchange Act of 1934
Date
        of
        report (Date of earliest event reported):
March
                  9, 2007
Commission
                  File Number
Exact
                  Name of Registrant as Specified in
Charter;
State
                  of Incorporation;
Address
                  and Telephone Number
IRS
                  Employer
Identification
                  Number
1-14756
Ameren
                  Corporation
(Missouri
                  Corporation)
1901
                  Chouteau Avenue
St.
                  Louis, Missouri 63103
(314)
                  621-3222
43-1723446
1-3672
Central
                  Illinois Public Service Company
(Illinois
                  Corporation)
607
                  East Adams Street
Springfield,
                  Illinois 62739
(217)
                  523-3600
37-0211380
2-95569
CILCORP
                  Inc.
(Illinois
                  Corporation)
300
                  Liberty Street
Peoria,
                  Illinois 61602
(309)
                  677-5271
37-1169387
1-2732
Central
                  Illinois Light Company
(Illinois
                  Corporation)
300
                  Liberty Street
Peoria,
                  Illinois 61602
(309)
                  677-5271
37-0211050
1-3004
Illinois
                  Power Company
(Illinois
                  Corporation)
370
                  South Main Street
Decatur,
                  Illinois 62523
(217)
                  424-6600
37-0344645
Check
        the
        appropriate box below if the Form 8-K filing is intended to simultaneously
        satisfy the filing obligation of the registrant under any of the following
        provisions:
[
        ]
        Written communications pursuant to Rule 425 under the Securities Act (17
        CFR
        230.425)
[
        ]
        Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
        240.14a-12)
[
        ]
        Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
        Act
        (17 CFR 240.14d-2(b))
[
        ]
        Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
        Act
        (17 CFR 240.13e-4(c))
-2-
ITEM
        1.01
Entry
        into a Material Definitive Agreement.
Ameren
        Corporation ("Ameren") previously announced that certain of its subsidiaries had
        entered into a new, multi-year committed bank credit facility (see Current
        Report on Form 8-K filed February 13, 2007 (the "February 13 Form 8-K")).
After
        receipt of required regulatory approvals, effective March 9, 2007, Central
        Illinois Public Service Company, doing business as AmerenCIPS ("CIPS"), Central
        Illinois Light Company, doing business as AmerenCILCO ("CILCO"), and Illinois
        Power Company, doing business as AmerenIP ("IP" and collectively with CIPS and
        CILCO, the "Ameren Illinois Utilities") became authorized to make borrowings and
        obtain letters of credit for their benefit under the $500 million multi-year,
        senior secured Credit Agreement, dated as of February 9, 2007 (the "2007 Credit
        Agreement") described in the February 13 Form 8-K. A copy of the 2007 Credit
        Agreement was filed as Exhibit 10.1 to the February 13 Form 8-K.
From
        March 9, 2007, IP is authorized to make borrowings and obtain letters of
        credit
        for its benefit up to $200 million under the 2007 Credit Agreement (in addition
        to the $150 million of authority it has under a Credit Agreement dated July
        14,
        2006 (the "2006 Illinois Credit Agreement")). CIPS and CILCO will continue to
        have borrowing capacity of $135 million and $150 million, respectively, under
        the 2006 Illinois Credit Agreement, but each will have the option of permanently
        reducing its borrowing capacity under the 2006 Illinois Credit Agreement
        and
        shifting, in one or more transactions, such capacity to the 2007 Credit
        Agreement up to the same limits. Until such time as CIPS or CILCO elects
        to
        increase its borrowing capacity under the 2007 Credit Agreement and issue
        first
        mortgage bonds as security for its obligations thereunder (as described in
        the
        February 13 Form 8-K and below), it will not constitute a "Borrower" under the
        2007 Credit Agreement and will not be subject to the covenants thereof (except
        as a subsidiary of a Borrower).
See
        the
        February 13 Form 8-K for a summary of the terms of the 2007 Credit Agreement
        applicable to the Ameren Illinois Utilities. Each of the Ameren Illinois
        Utilities has entered into a Supplemental Indenture providing for the issuance
        of mortgage bonds as security for its obligations under the 2007 Credit
        Agreement. Copies of such Supplemental Indentures are filed herewith as Exhibits
        4.2, 4.4 and 4.6.
ITEM 2.03
Creation
        of a Direct Financial Obligation or an Obligation under an Off-
Balance
        Sheet Arrangement of a Registrant.
See
        Item 1.01 of the February 13 Form 8-K for a description of the 2007 Credit
        Agreement, a copy of which was attached thereto as Exhibit 10.1 and is
        incorporated herein by reference.
To
        secure
        its obligations under the 2007 Credit Agreement, CIPS has authorized the
        issuance of up to $135,000,000 of its First Mortgage Bonds, 2007 Credit
        Agreement Series (the "CIPS Credit Agreement Bonds") under its Indenture of
        Mortgage and Deed of Trust dated October 1, 1941, as supplemented by the
        Supplemental Indenture dated as of March 1, 2007 (filed herewith as Exhibit
        4.2)
        (the "CIPS Mortgage").
To
        secure
        its obligations under the 2007 Credit Agreement, CILCO has authorized the
        issuance of up to $150,000,000 of its First Mortgage Bonds, 2007 Credit
        Agreement Series (the "CILCO Credit Agreement Bonds") under its Indenture of
        Mortgage and Deed of Trust, as supplemented by the Supplemental Indenture
        dated
        as of March 1, 2007 (filed herewith as Exhibit 4.4) (the "CILCO
        Mortgage").
To
        secure
        its obligations under the 2007 Credit Agreement, IP has issued $200,000,000
        of
        its Mortgage Bonds, 2007 Credit Agreement Series (the "IP Credit Agreement
        Bonds, and together with the CIPS Credit Agreement Bonds and the CILCO Credit
        Agreement Bonds, the "Credit Agreement Bonds") under its General Mortgage
        Indenture and Deed of Trust, as supplemented by the Supplemental Indenture
        dated
        as of March 1, 2007 (filed herewith as Exhibit 4.6) (the "IP Mortgage").
The
        IP
        Credit Agreement Bonds were issued and delivered, and the CIPS Credit Agreement
        Bonds and the
-3-
CILCO
        Credit Agreement Bonds will be issued and delivered to the extent such company
        increases its borrowing capacity under the 2007 Credit Agreement, to JPMorgan
        Chase Bank, N.A. as agent for the lenders under the 2007 Credit Agreement
        in
        order to evidence and secure the respective obligations of the Ameren Illinois
        Utilities under the 2007 Credit Agreement to make payments to the lenders
        under
        the 2007 Credit Agreement and to provide the lenders the benefit of the lien
        of
        the CIPS Mortgage, the CILCO Mortgage and the IP Mortgage, respectively,
        with
        respect to the applicable Credit Agreement Bonds.
The
        obligation of each Ameren Illinois Utility to make payments with respect
        to
        principal under the 2007 Credit Agreement will not give rise to an obligation
        to
        pay principal of the respective Credit Agreement Bonds except on the maturity
        date of such Ameren Illinois Utility's obligations under the 2007 Credit
        Agreement or upon redemption of such Credit Agreement Bonds. Upon the occurrence
        of a default and an acceleration of an Ameren Illinois Utility's obligations
        under the 2007 Credit Agreement, and upon notice given by the agent to the
        respective trustee under the CIPS Mortgage, the CILCO Mortgage or the IP
        Mortgage, as the case may be, the Credit Agreement Bonds of the applicable
        Ameren Illinois Utility will be subject to immediate redemption in the amount
        of
        all obligations owed by such Ameren Illinois Utility under the 2007 Credit
        Agreement.
If
        any
        Ameren Illinois Utility's borrowing limit is permanently reduced under the 2007
        Credit Agreement, such Ameren Illinois Utility's obligation under its Credit
        Agreement Bond will be deemed discharged to that extent. The obligation of
        each
        Ameren Illinois Utility to make payments with respect to the interest on
        its
        Credit Agreement Bonds will be satisfied and discharged to the extent that,
        at
        the time that any such payment shall be due, the then due interest and/or
        fees
        of such Ameren Illinois Utility under the 2007 Credit Agreement has been
        paid.
        If any payment is made on interest and/or fees of an Ameren Illinois Utility
        under the 2007 Credit Agreement, a corresponding payment obligation with
        respect
        to the interest or fees on the respective Credit Agreement Bonds shall be
        deemed
        discharged in the same amount.
The
        Credit Agreement Bonds do not contain any provision regarding the release
        of the
        lien of the mortgage in the event of the retirement or redemption of all
        other
        mortgage bonds subject to the lien of the respective mortgage.
-4-
ITEM
        9.01
        Financial Statements and Exhibits.
(d)
        Exhibits
Exhibit
                  Number
:
Registrant(s):
Title
:
4.1
                  *
Ameren;
CIPS
Indenture
                  of Mortgage and Deed of Trust dated October 1, 1941,
from
                  CIPS to U.S. Bank National Association and Richard
Prokosch
                  (successors to Continental Illinois National Bank and
Trust
                  Company of Chicago and Edmond B. Stofft), as trustees, as
supplemented
                  (the "CIPS Mortgage") (Annual Report on Form
10-K
                  for the year ended December 31, 2006, Exhibits 4.50
through
                  4.63).
4.2
                  **
Ameren;
CIPS
Supplemental
                  Indenture dated as of March 1, 2007 to the CIPS
Mortgage
                  relating to the First Mortgage Bonds, 2007 Credit
Agreement
                  Series securing CIPS' obligations under the
Credit
Agreement,
dated as of February 9, 2007 (the "2007
                  Credit
Agreement").
4.3
                  *
Ameren;
                  CILCORP
CILCO
Indenture
                  of Mortgage and Deed of Trust between Illinois Power
Company
                  (predecessor in interest to CILCO) and Deutsche Bank
Trust
                  Company Americas (formerly known as Bankers Trust
Company),
                  as trustee, dated as of April 1, 1933, as supplemented
(the
                  "CILCO Mortgage") (Annual Report on Form 10-K for the
year
                  ended December 31, 2006, Exhibits 4.75 through 4.82).
4.4
                  **
Ameren;
                  CILCORP
CILCO
Supplemental
                  Indenture dated as of March 1, 2007 to the CILCO
Mortgage
                  relating to the First Mortgage Bonds, 2007 Credit
Agreement
                  Series securing CILCO's obligations under the
2007
Credit
Agreement.
4.5
                  *
Ameren;
IP
General
                  Mortgage Indenture and Deed of Trust dated as of
November
                  1, 1992 between IP and BNY Midwest Trust
Company
                  (successor to Harris Trust and Savings Bank), as
trustee,
                  as supplemented (the "IP Mortgage") (Annual Report on
Form
                  10-K for the year ended December 31, 2006, Exhibits 4.85
through
                  4.95).
4.6
                  **
Ameren;
IP
Supplemental
                  Indenture dated as of March 1, 2007 to the IP
Mortgage
                  relating to the Mortgage Bonds, 2007 Credit
Agreement
                  Series securing IP's obligations under the 2007 Credit
Agreement.
*   Incorporated
        by reference as indicated.
**
        Filed
        herewith.
-5-
-
        - - - -
        - - - - - - - - - - - - - - -
This
        combined Form 8-K is being filed separately by Ameren Corporation, Central
        Illinois Public Service Company, CILCORP Inc., Central Illinois Light Company
        and Illinois Power Company (each a "registrant"). Information contained herein
        relating to any individual registrant has been filed by such registrant on
        its
        own behalf. No registrant makes any representation as to information relating
        to
        any other registrant.
-6-
SIGNATURES
Pursuant
        to the requirements of the Securities Exchange Act of 1934, each registrant
        has
        duly caused this report to be signed on its behalf by the undersigned thereunto
        duly authorized. The signature for each undersigned company shall be deemed
        to
        relate only to matters having reference to such company or its
        subsidiaries.
AMEREN
        CORPORATION
(Registrant)
/s/
        Jerre E.
        Birdsong
Jerre
        E.
        Birdsong
Vice
        President and Treasurer
CENTRAL
        ILLINOIS PUBLIC SERVICE COMPANY
(Registrant)
/s/
        Jerre E.
        Birdsong
Jerre
        E.
        Birdsong
Vice
        President and Treasurer
CILCORP
        INC.
(Registrant)
/s/
        Jerre E.
        Birdsong
Jerre
        E.
        Birdsong
Vice
        President and Treasurer
CENTRAL
        ILLINOIS LIGHT COMPANY
(Registrant)
/s/
        Jerre E.
        Birdsong
Jerre
        E.
        Birdsong
Vice
        President and Treasurer
ILLINOIS
        POWER COMPANY
(Registrant)
/s/
        Jerre E.
        Birdsong
Jerre
        E.
        Birdsong
Vice
        President and Treasurer
Date:
        March 14, 2007
-7-
Exhibit
        Index
Exhibit
                  Number
:
Registrant(s):
Title
:
4.1
                  *
Ameren;
CIPS
Indenture
                  of Mortgage and Deed of Trust dated October 1, 1941,
from
                  CIPS to U.S. Bank National Association and Richard
Prokosch
                  (successors to Continental Illinois National Bank and
Trust
                  Company of Chicago and Edmond B. Stofft), as trustees, as
supplemented
                  (the "CIPS Mortgage") (Annual Report on Form
10-K
                  for the year ended December 31, 2006, Exhibits 4.50
through
                  4.63).
4.2
                  **
Ameren;
CIPS
Supplemental
                  Indenture dated as of March 1, 2007 to the CIPS
Mortgage
                  relating to the First Mortgage Bonds, 2007 Credit
Agreement
                  Series securing CIPS' obligations under the
Credit
Agreement,
                  dated as of February 9, 2007 (the "2007 Credit
Agreement").
4.3
                  *
Ameren;
                  CILCORP
CILCO
Indenture
                  of Mortgage and Deed of Trust between Illinois Power
Company
                  (predecessor in interest to CILCO) and Deutsche Bank
Trust
                  Company Americas (formerly known as Bankers Trust
Company),
                  as trustee, dated as of April 1, 1933, as supplemented
(the
                  "CILCO Mortgage") (Annual Report on Form 10-K for the
year
                  ended December 31, 2006, Exhibits 4.75 through 4.82).
4.4
                  **
Ameren;
                  CILCORP
CILCO
Supplemental
                  Indenture dated as of March 1, 2007 to the CILCO
Mortgage
                  relating to the First Mortgage Bonds, 2007 Credit
Agreement
                  Series securing CILCO's obligations under the
2007
Credit
Agreement.
4.5
                  *
Ameren;
IP
General
                  Mortgage Indenture and Deed of Trust dated as of
November
                  1, 1992 between IP and BNY Midwest Trust
Company
                  (successor to Harris Trust and Savings Bank), as
trustee,
                  as supplemented (the "IP Mortgage") (Annual Report on
Form
                  10-K for the year ended December 31, 2006, Exhibits 4.85
through
                  4.95).
4.6
                  **
Ameren;
IP
Supplemental
                  Indenture dated as of March 1, 2007 to the IP
Mortgage
                  relating to the Mortgage Bonds, 2007 Credit
Agreement
                  Series securing IP's obligations under the 2007 Credit
Agreement.
*   
        Incorporated by reference as indicated.
** 
        Filed herewith.
-8-