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      Ameren 8-K, dated 02/13/2007
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      AND EXCHANGE COMMISSION</font></div>
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                8-K</font></div>
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      REPORT</font></div>
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      to Section 13 or 15(d) of the</font></div>
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      Exchange Act of 1934</font></div>
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      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">February
                9, 2007</font></div>
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                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 </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">Specified
                in 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>
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                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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            <td align="justify" valign="top" width="26%">
              <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="26%">
              <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="26%">
              <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>
            <td align="left" valign="top" width="26%">
              <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>
          </tr>
          <tr>
            <td align="left" valign="top" width="26%">
              <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="26%">
              <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>
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          <tr>
            <td align="left" valign="top" width="26%">
              <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>
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            <td align="left" valign="top" width="26%">
              <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="26%">
              <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="26%">
              <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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      the
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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"><br></font>
      <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
        </font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">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="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">On
        February 9, 2007, Ameren Corporation (&#8220;Ameren&#8221;) subsidiaries Central Illinois
        Public Service Company, doing business as AmerenCIPS (&#8220;CIPS&#8221;), Central Illinois
        Light Company, doing business as AmerenCILCO (&#8220;CILCO&#8221;), Illinois Power Company,
        doing business as AmerenIP (&#8220;IP&#8221; and collectively with CIPS and CILCO, the
&#8220;Ameren Illinois Utilities&#8221;), CILCORP Inc. (&#8220;CILCORP&#8221;) and AmerenEnergy
        Resources Generating Company (&#8220;AERG&#8221; and collectively with the Ameren Illinois
        Utilities and CILCORP, the &#8220;Borrowers&#8221;), JPMorgan Chase Bank, N.A., as agent and
        the other lenders identified therein entered into a Credit Agreement dated
        as of
        February 9, 2007 (the &#8220;2007 Credit Agreement&#8221;). The 2007 Credit Agreement
        provides a $500 million credit facility to the Borrowers in addition to the
        $500
        million facility provided by the Credit Agreement dated July 14, 2006 (the
        &#8220;Prior Illinois Credit Agreement&#8221;) among the Borrowers and JPMorgan Chase Bank,
        N.A., as agent, which remains in effect. The 2007 Credit Agreement will
        terminate on January 14, 2010. A copy of the 2007 Credit Agreement is filed
        as
        Exhibit 10.1 to this Current Report on Form 8-K. </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: 27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Under
        the
        2007 Credit Agreement, the maximum amount available to each Borrower, including
        for issuance of letters of credit on its behalf, is limited as follows. CILCORP,
        $125 million; AERG, $100 million and IP, $200&#160;million. The borrowing
        authority of these companies under the Prior Illinois Credit Agreement remains
        unchanged at CILCORP, $50 million, AERG, $200 million and IP, $150 million.
        CILCO and CIPS will continue to have borrowing capacity of $150 million and
        $135
        million, respectively, under the Prior Illinois Credit Agreement, but each
        will
        have the option of permanently reducing its borrowing capacity under the
        Prior
        Illinois Credit Agreement and shifting, in one or more transactions, such
        capacity to the 2007 Credit Agreement up to the same limits. The borrowing
        authority of CILCO and CIPS under the Prior Illinois Credit Agreement and
        the
        2007 Credit Agreement cannot at any time exceed $150 million and $135 million,
        respectively, in the aggregate. Until such time as CILCO or CIPS elects to
        increase its borrowing capacity under the 2007 Credit Agreement and issue
        first
        mortgage bonds as security for its obligations thereunder (as described 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: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Borrowing
        authority under the 2007 Credit Agreement is effective immediately for AERG
        and
        CILCORP. The ability of the Ameren Illinois Utilities to borrow under the
        2007
        Credit Agreement is subject to receipt of necessary regulatory approvals
        and the
        issuance by the Ameren Illinois Utilities of mortgage bonds as security as
        described below.</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: 27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
        obligations of each Borrower under the 2007 Credit Agreement will be several
        and
        not joint, and are not guaranteed by Ameren or any other subsidiary of Ameren.
        The Borrowers will use the proceeds of any borrowings for working capital
        and
        other general corporate purposes; however, a portion of the borrowings by
        AERG
        may be limited to financing or refinancing the development, management and/or
        operation of any of its projects or assets.</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: 27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Borrowings
        under the 2007 Credit Agreement will bear interest, at the election of the
        Borrower, at (1) a Eurodollar rate plus a margin applicable to the particular
        borrowing company or (2) a rate equal to the higher of the prime rate of
        JPMorgan Chase Bank, N.A or the federal funds effective rate plus &#189;% per year,
        plus a margin applicable to the particular borrowing company.</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: 27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
        obligations of CILCORP under the 2007 Credit Agreement are secured by a pledge
        of the common stock of CILCO (which pledge is on an equal and ratable basis
        with
        the pledge of such common stock by CILCORP to secure its obligations under
        the
        Prior Illinois Credit Agreement and its 9.375% senior bonds due 2029 and
        its
        8.70% senior notes due 2009). This pledge is evidenced by the Pledge Agreement
        Supplement, dated as of February&#160;9, 2007 (the &#8220;Pledge Supplement&#8221;) to the
        Pledge Agreement, dated as of October 18, 1999 between CILCORP and The Bank
        of
        New York, as collateral agent (a copy of which is filed as Exhibit 10.1 to
        the
        Current Report on Form 8-K of CILCORP (File No. 1-08946) filed October 29,
        1999). The Pledge Supplement is filed as Exhibit 10.2 to this Current Report
        on
        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: 27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
        obligations of AERG under the 2007 Credit Agreement are secured by a mortgage
        and security interest in its E.D. Edwards and Duck Creek generating stations
        and
        related licenses, permits and similar rights. The mortgage regarding the
        E. D.
        Edwards plant is filed as Exhibit 10.4 and the mortgage regarding the Duck
        Creek
        plant </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">-1-</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: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; 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">is
        filed
        as Exhibit 10.5 to the Current Report on Form 8-K filed July 18, 2006. Pursuant
        to a Collateral Agency Agreement Supplement, dated as of February 9, 2007
        (the
&#8220;Collateral Agency Supplement&#8221;) to the Collateral Agency Agreement between AERG
        and The Bank of New York Trust Company, N.A., as collateral agent, dated
        as of
        July&#160;14, 2006, AERG&#8217;s obligations under the 2007 Credit Agreement are
        secured on an equal and ratable basis with AERG&#8217;s obligations under the Prior
        Illinois Credit Agreement. AERG will be able to provide security to other
        lenders or security holders in the mortgaged property on an equal and ratable
        basis with the lenders under the 2007&#160;Credit Agreement and the Prior
        Illinois Credit Agreement subject to a limitation on the amount of such
        additional secured indebtedness described below. The Collateral Agency
        Supplement is filed as Exhibit 10.3 to this Current Report on Form 8-K. The
        Collateral Agency Agreement is filed as Exhibit 10.6 to the Current Report
        on
        Form 8-K filed July 18, 2006.</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: 27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Subject
        to the receipt of regulatory approval, the obligations of the Ameren Illinois
        Utilities under the 2007&#160;Credit Agreement will be secured by the issuance
        of mortgage bonds by each such utility under its respective mortgage indenture.
        If CIPS or CILCO elect to transfer borrowing authority from the Prior Illinois
        Credit Agreement to the 2007 Credit Agreement, such company will retire an
        appropriate amount of first mortgage bonds under the Prior Illinois Credit
        Agreement and issue new bonds in an equal amount to secure its obligations
        under
        the 2007&#160;Credit Agreement.</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: 27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
        2007
        Credit Agreement limits the amount of secured indebtedness issuable by each
        Borrower, excluding that under the Prior Illinois Credit Agreement and the
        2007
        Credit Agreement, as follows: for the Ameren Illinois Utilities, other secured
        debt is limited to that permitted under their respective mortgage indentures
        (subject to a covenant regarding excess bonding capacity described below);
        for
        CILCORP, other secured debt is limited to $425&#160;million secured by the
        pledge of CILCO stock (increased by the amount of any permanent reduction
        in
        CILCORP&#8217;s borrowing capacity under the Prior Illinois Credit Agreement or the
        2007 Credit Agreement) and for AERG, other secured debt is limited to $100
        million secured on a parity basis with its obligations under the
        2007&#160;Credit Agreement (increased by the amount of any permanent reduction
        in AERG&#8217;s borrowing capacity under the Prior Illinois Credit Agreement or the
        2007 Credit Agreement). </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: 27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
        2007
        Credit Agreement provides that each of the Ameren Illinois Utilities will
        agree
        to reserve future bonding capacity under its mortgage indenture (that is,
        agree
        to forego the issuance of additional mortgage bonds otherwise permitted under
        the terms of its mortgage indenture) in the following amounts: </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: 27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">CILCO:
        at
        all times prior to December 31, 2007, $25,000,000; at all times on and after
        December 31, 2007 but prior to December 31, 2008, $50,000,000; at all times
        on
        and after December 31, 2008, but prior to December 31, 2009, $75,000,000;
        and at
        all times on and after December 31, 2009, $150,000,000; provided that at
        any
        time prior to the time CILCO&#8217;s borrowing capacity under the 2007 Credit
        Agreement equals $150,000,000, the requirement on any date shall be the greater
        of (A) the excess bonding requirement under the Prior Illinois Credit Agreement
        and (B) the requirement set forth above multiplied by the percentage of
        $150,000,000 represented by the borrowing capacity of CILCO under the 2007
        Credit Agreement at such time.</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: 27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">CIPS:
        at
        all times prior to December 31, 2007, $50,000,000; at all times on and after
        December 31, 2007 but prior to December 31, 2008, $100,000,000; at all times
        on
        and after December 31, 2008, but prior to December 31, 2009, $150,000,000;
        and
        at all times on and after December 31, 2009, $200,000,000; provided that
        at any
        time on or after December 31, 2009, and prior to the time CIPS&#8217; borrowing
        capacity under the 2007 Credit Agreement equals $135,000,000, the requirement
        shall be the greater of (A) the excess bonding requirement under the Prior
        Illinois Credit Agreement and (B) the requirement set forth above multiplied
        by
        the percentage of $135,000,000 represented by the borrowing capacity of CIPS
        under the 2007 Credit Agreement at such time.</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: 27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">IP:
        at
        all times prior to December 31, 2008, $100,000,000; at all times on and after
        December 31, 2008 but prior to December 31, 2009, $200,000,000; and at all
        times
        on and after December 31, 2009, $350,000,000.</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: 27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
        2007
        Credit Agreement has terms similar to the Prior Illinois Credit Agreement,
        including conditions to borrowings and issuance of letters of credit including
        absence of default or unmatured default, accuracy of representations (other
        than, for a borrowing to repay maturing commercial paper, representations
        as to
        absence of material adverse change and material litigation) and warranties
        and
        required regulatory authorizations. The 2007&#160;Credit Agreement contains
        non-financial covenants including restrictions on the ability to incur liens,
        dispose of </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">-2-</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: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; 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">assets
        and merge with other entities. In addition, the 2007 Credit Agreement has
        non-financial covenants to limit the ability of a borrower to invest in or
        transfer assets to affiliates, covenants regarding the status of the collateral
        securing the 2007 Credit Agreement and validity of the security interests
        therein and limitations (the required percentage of lenders under the Prior
        Illinois Credit Agreement having agreed to remove therefrom the otherwise
        applicable restriction on the Borrowers&#8217; agreeing to such limitations) on
        dividends, distributions and other payments on capital stock of the Borrowers
        if
        an event of default has occurred and is continuing or, subject to an ability
        of
        each Borrower to make such dividends, distributions and other payments in
        an
        aggregate amount during any fiscal year not to exceed $10 million, in the
        event
        of certain changes to ratings to below investment grade (or, in the case
        of AERG
        if it is unrated, failure by AERG to maintain one or more financial ratios).
        The
        events of default in the 2007 Credit Agreement are similar to those contained
        in
        the Prior Illinois Credit Agreement.</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: 27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
        2007
        Credit Agreement requires each Borrower to maintain consolidated indebtedness
        of
        not more than 65% of consolidated total capitalization.</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: 27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Events
        of
        default under the 2007 Credit Agreement apply separately to each Borrower
        (and,
        subject to exceptions, their subsidiaries). A Borrower&#8217;s event of default under
        the Prior Illinois Credit Agreement constitutes an event of default only
        for
        such Borrower under the 2007 Credit Agreement. The 2007 Credit Agreement
        and the
        Prior Illinois Credit Agreement contain cross default provisions in the event
        of
        a default by a Borrower on any indebtedness under other agreements in excess
        of
        specified amounts.</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: 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&#160;&#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></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;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
        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: 27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">See
        Item&#160;1.01 above for a description of the 2007 Credit Agreement, a copy of
        which is attached hereto 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 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>
                <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="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>
              </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">10.1</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,
                  CILCORP, 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">CILCO
                  and 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="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Credit
                  Agreement dated as of February 9, 2007 (&#8220;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&#8221;)</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">10.2</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">CILCORP
                  and CILCO</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="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">Pledge
                  Agreement Supplement dated February 9, 2007</font></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">10.3</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">CILCORP
                  and CILCO </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">(relating
                  to CILCO&#8217;s </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">subsidiary
                  AERG, a non-</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">registrant)</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">Collateral
                  Agency Agreement Supplement between AERG and </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">The
                  Bank of New York Trust Company, N.A., dated as of </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">February
                  9, 2007</font></div>
              </td>
            </tr>

        </table>
      </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="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">-
        - - - -
        - - - - - - - - - - - - - - - </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: 27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><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">-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="center">&#160;</div>
    </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">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: 27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><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;
</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;</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">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;</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 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;</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">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;
</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: 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:
      February 13, 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 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">-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>
    <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><br>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
      <table cellpadding="0" cellspacing="0" width="100%">

          <tr>
            <td align="left" valign="top" width="16%" 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>
              <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="25%" 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>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="16%">
              <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">10.1</font></div>
            </td>
            <td align="left" valign="top" width="25%">
              <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, 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">CILCO
                and 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="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Credit
                Agreement dated as of February 9, 2007 (&#8220;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&#8221;)</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="16%">
              <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">10.2</font></div>
            </td>
            <td align="left" valign="top" width="25%">
              <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
                and CILCO</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="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">Pledge
                Agreement Supplement dated February 9, 2007</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="16%">
              <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">10.3</font></div>
            </td>
            <td align="left" valign="top" width="25%">
              <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
                and CILCO </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">(relating
                to CILCO&#8217;s </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">subsidiary
                AERG, a non-</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">registrant)</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">Collateral
                Agency Agreement Supplement between AERG and </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">The
                Bank of New York Trust Company, N.A., dated as of </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">February
                9, 2007</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div>&#160;</div>
    <div>&#160;</div>
    <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 9pt; FONT-FAMILY: Times New Roman">-5-</font></div>
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[{"type": "8-K", "sequence": "1", "filename": "ameren8k02132007.htm", "description": "AMEREN 8-K, DATED 02/13/2007", "secsgml_size_bytes": 74506}]
[{"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": "07608187"}, "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"}}, {"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": "07608186"}, "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": "07608188"}, "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": "07608185"}, "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": "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": "07608189"}, "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"}}]
Ameren 8-K, dated 02/13/2007
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):
February
                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))
ITEM
1.01
Entry
        into a Material Definitive Agreement.
On
        February 9, 2007, Ameren Corporation ("Ameren") subsidiaries Central Illinois
        Public Service Company, doing business as AmerenCIPS ("CIPS"), Central Illinois
        Light Company, doing business as AmerenCILCO ("CILCO"), Illinois Power Company,
        doing business as AmerenIP ("IP" and collectively with CIPS and CILCO, the
"Ameren Illinois Utilities"), CILCORP Inc. ("CILCORP") and AmerenEnergy
        Resources Generating Company ("AERG" and collectively with the Ameren Illinois
        Utilities and CILCORP, the "Borrowers"), JPMorgan Chase Bank, N.A., as agent and
        the other lenders identified therein entered into a Credit Agreement dated
        as of
        February 9, 2007 (the "2007 Credit Agreement"). The 2007 Credit Agreement
        provides a $500 million credit facility to the Borrowers in addition to the
        $500
        million facility provided by the Credit Agreement dated July 14, 2006 (the
        "Prior Illinois Credit Agreement") among the Borrowers and JPMorgan Chase Bank,
        N.A., as agent, which remains in effect. The 2007 Credit Agreement will
        terminate on January 14, 2010. A copy of the 2007 Credit Agreement is filed
        as
        Exhibit 10.1 to this Current Report on Form 8-K.
Under
        the
        2007 Credit Agreement, the maximum amount available to each Borrower, including
        for issuance of letters of credit on its behalf, is limited as follows. CILCORP,
        $125 million; AERG, $100 million and IP, $200 million. The borrowing
        authority of these companies under the Prior Illinois Credit Agreement remains
        unchanged at CILCORP, $50 million, AERG, $200 million and IP, $150 million.
        CILCO and CIPS will continue to have borrowing capacity of $150 million and
        $135
        million, respectively, under the Prior Illinois Credit Agreement, but each
        will
        have the option of permanently reducing its borrowing capacity under the
        Prior
        Illinois Credit Agreement and shifting, in one or more transactions, such
        capacity to the 2007 Credit Agreement up to the same limits. The borrowing
        authority of CILCO and CIPS under the Prior Illinois Credit Agreement and
        the
        2007 Credit Agreement cannot at any time exceed $150 million and $135 million,
        respectively, in the aggregate. Until such time as CILCO or CIPS elects to
        increase its borrowing capacity under the 2007 Credit Agreement and issue
        first
        mortgage bonds as security for its obligations thereunder (as described 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).
Borrowing
        authority under the 2007 Credit Agreement is effective immediately for AERG
        and
        CILCORP. The ability of the Ameren Illinois Utilities to borrow under the
        2007
        Credit Agreement is subject to receipt of necessary regulatory approvals
        and the
        issuance by the Ameren Illinois Utilities of mortgage bonds as security as
        described below.
The
        obligations of each Borrower under the 2007 Credit Agreement will be several
        and
        not joint, and are not guaranteed by Ameren or any other subsidiary of Ameren.
        The Borrowers will use the proceeds of any borrowings for working capital
        and
        other general corporate purposes; however, a portion of the borrowings by
        AERG
        may be limited to financing or refinancing the development, management and/or
        operation of any of its projects or assets.
Borrowings
        under the 2007 Credit Agreement will bear interest, at the election of the
        Borrower, at (1) a Eurodollar rate plus a margin applicable to the particular
        borrowing company or (2) a rate equal to the higher of the prime rate of
        JPMorgan Chase Bank, N.A or the federal funds effective rate plus ½% per year,
        plus a margin applicable to the particular borrowing company.
The
        obligations of CILCORP under the 2007 Credit Agreement are secured by a pledge
        of the common stock of CILCO (which pledge is on an equal and ratable basis
        with
        the pledge of such common stock by CILCORP to secure its obligations under
        the
        Prior Illinois Credit Agreement and its 9.375% senior bonds due 2029 and
        its
        8.70% senior notes due 2009). This pledge is evidenced by the Pledge Agreement
        Supplement, dated as of February 9, 2007 (the "Pledge Supplement") to the
        Pledge Agreement, dated as of October 18, 1999 between CILCORP and The Bank
        of
        New York, as collateral agent (a copy of which is filed as Exhibit 10.1 to
        the
        Current Report on Form 8-K of CILCORP (File No. 1-08946) filed October 29,
        1999). The Pledge Supplement is filed as Exhibit 10.2 to this Current Report
        on
        Form 8-K.
The
        obligations of AERG under the 2007 Credit Agreement are secured by a mortgage
        and security interest in its E.D. Edwards and Duck Creek generating stations
        and
        related licenses, permits and similar rights. The mortgage regarding the
        E. D.
        Edwards plant is filed as Exhibit 10.4 and the mortgage regarding the Duck
        Creek
        plant
-1-
is
        filed
        as Exhibit 10.5 to the Current Report on Form 8-K filed July 18, 2006. Pursuant
        to a Collateral Agency Agreement Supplement, dated as of February 9, 2007
        (the
"Collateral Agency Supplement") to the Collateral Agency Agreement between AERG
        and The Bank of New York Trust Company, N.A., as collateral agent, dated
        as of
        July 14, 2006, AERG's obligations under the 2007 Credit Agreement are
        secured on an equal and ratable basis with AERG's obligations under the Prior
        Illinois Credit Agreement. AERG will be able to provide security to other
        lenders or security holders in the mortgaged property on an equal and ratable
        basis with the lenders under the 2007 Credit Agreement and the Prior
        Illinois Credit Agreement subject to a limitation on the amount of such
        additional secured indebtedness described below. The Collateral Agency
        Supplement is filed as Exhibit 10.3 to this Current Report on Form 8-K. The
        Collateral Agency Agreement is filed as Exhibit 10.6 to the Current Report
        on
        Form 8-K filed July 18, 2006.
Subject
        to the receipt of regulatory approval, the obligations of the Ameren Illinois
        Utilities under the 2007 Credit Agreement will be secured by the issuance
        of mortgage bonds by each such utility under its respective mortgage indenture.
        If CIPS or CILCO elect to transfer borrowing authority from the Prior Illinois
        Credit Agreement to the 2007 Credit Agreement, such company will retire an
        appropriate amount of first mortgage bonds under the Prior Illinois Credit
        Agreement and issue new bonds in an equal amount to secure its obligations
        under
        the 2007 Credit Agreement.
The
        2007
        Credit Agreement limits the amount of secured indebtedness issuable by each
        Borrower, excluding that under the Prior Illinois Credit Agreement and the
        2007
        Credit Agreement, as follows: for the Ameren Illinois Utilities, other secured
        debt is limited to that permitted under their respective mortgage indentures
        (subject to a covenant regarding excess bonding capacity described below);
        for
        CILCORP, other secured debt is limited to $425 million secured by the
        pledge of CILCO stock (increased by the amount of any permanent reduction
        in
        CILCORP's borrowing capacity under the Prior Illinois Credit Agreement or the
        2007 Credit Agreement) and for AERG, other secured debt is limited to $100
        million secured on a parity basis with its obligations under the
        2007 Credit Agreement (increased by the amount of any permanent reduction
        in AERG's borrowing capacity under the Prior Illinois Credit Agreement or the
        2007 Credit Agreement).
The
        2007
        Credit Agreement provides that each of the Ameren Illinois Utilities will
        agree
        to reserve future bonding capacity under its mortgage indenture (that is,
        agree
        to forego the issuance of additional mortgage bonds otherwise permitted under
        the terms of its mortgage indenture) in the following amounts:
CILCO:
        at
        all times prior to December 31, 2007, $25,000,000; at all times on and after
        December 31, 2007 but prior to December 31, 2008, $50,000,000; at all times
        on
        and after December 31, 2008, but prior to December 31, 2009, $75,000,000;
        and at
        all times on and after December 31, 2009, $150,000,000; provided that at
        any
        time prior to the time CILCO's borrowing capacity under the 2007 Credit
        Agreement equals $150,000,000, the requirement on any date shall be the greater
        of (A) the excess bonding requirement under the Prior Illinois Credit Agreement
        and (B) the requirement set forth above multiplied by the percentage of
        $150,000,000 represented by the borrowing capacity of CILCO under the 2007
        Credit Agreement at such time.
CIPS:
        at
        all times prior to December 31, 2007, $50,000,000; at all times on and after
        December 31, 2007 but prior to December 31, 2008, $100,000,000; at all times
        on
        and after December 31, 2008, but prior to December 31, 2009, $150,000,000;
        and
        at all times on and after December 31, 2009, $200,000,000; provided that
        at any
        time on or after December 31, 2009, and prior to the time CIPS' borrowing
        capacity under the 2007 Credit Agreement equals $135,000,000, the requirement
        shall be the greater of (A) the excess bonding requirement under the Prior
        Illinois Credit Agreement and (B) the requirement set forth above multiplied
        by
        the percentage of $135,000,000 represented by the borrowing capacity of CIPS
        under the 2007 Credit Agreement at such time.
IP:
        at
        all times prior to December 31, 2008, $100,000,000; at all times on and after
        December 31, 2008 but prior to December 31, 2009, $200,000,000; and at all
        times
        on and after December 31, 2009, $350,000,000.
The
        2007
        Credit Agreement has terms similar to the Prior Illinois Credit Agreement,
        including conditions to borrowings and issuance of letters of credit including
        absence of default or unmatured default, accuracy of representations (other
        than, for a borrowing to repay maturing commercial paper, representations
        as to
        absence of material adverse change and material litigation) and warranties
        and
        required regulatory authorizations. The 2007 Credit Agreement contains
        non-financial covenants including restrictions on the ability to incur liens,
        dispose of
-2-
assets
        and merge with other entities. In addition, the 2007 Credit Agreement has
        non-financial covenants to limit the ability of a borrower to invest in or
        transfer assets to affiliates, covenants regarding the status of the collateral
        securing the 2007 Credit Agreement and validity of the security interests
        therein and limitations (the required percentage of lenders under the Prior
        Illinois Credit Agreement having agreed to remove therefrom the otherwise
        applicable restriction on the Borrowers' agreeing to such limitations) on
        dividends, distributions and other payments on capital stock of the Borrowers
        if
        an event of default has occurred and is continuing or, subject to an ability
        of
        each Borrower to make such dividends, distributions and other payments in
        an
        aggregate amount during any fiscal year not to exceed $10 million, in the
        event
        of certain changes to ratings to below investment grade (or, in the case
        of AERG
        if it is unrated, failure by AERG to maintain one or more financial ratios).
        The
        events of default in the 2007 Credit Agreement are similar to those contained
        in
        the Prior Illinois Credit Agreement.
The
        2007
        Credit Agreement requires each Borrower to maintain consolidated indebtedness
        of
        not more than 65% of consolidated total capitalization.
Events
        of
        default under the 2007 Credit Agreement apply separately to each Borrower
        (and,
        subject to exceptions, their subsidiaries). A Borrower's event of default under
        the Prior Illinois Credit Agreement constitutes an event of default only
        for
        such Borrower under the 2007 Credit Agreement. The 2007 Credit Agreement
        and the
        Prior Illinois Credit Agreement contain cross default provisions in the event
        of
        a default by a Borrower on any indebtedness under other agreements in excess
        of
        specified amounts.
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 above for a description of the 2007 Credit Agreement, a copy of
        which is attached hereto as Exhibit 10.1 and is incorporated herein by
        reference.
ITEM
        9.01
        Financial Statements and Exhibits.
(d)
        Exhibits
Exhibit
                  Number
:
Registrant(s)
:
Title
:
10.1
Ameren,
                  CILCORP, CIPS,
CILCO
                  and IP
Credit
                  Agreement dated as of February 9, 2007 ("2007 Credit
Agreement")
10.2
CILCORP
                  and CILCO
Pledge
                  Agreement Supplement dated February 9, 2007
10.3
CILCORP
                  and CILCO
(relating
                  to CILCO's
subsidiary
                  AERG, a non-
registrant)
Collateral
                  Agency Agreement Supplement between AERG and
The
                  Bank of New York Trust Company, N.A., dated as of
February
                  9, 2007
-
        - - - -
        - - - - - - - - - - - - - - -
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.
-3-
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:
      February 13, 2007
-4-
Exhibit
      Index
Exhibit
                Number
:
Registrant(s)
:
Title
:
10.1
Ameren,
                CILCORP, CIPS,
CILCO
                and IP
Credit
                Agreement dated as of February 9, 2007 ("2007 Credit
Agreement")
10.2
CILCORP
                and CILCO
Pledge
                Agreement Supplement dated February 9, 2007
10.3
CILCORP
                and CILCO
(relating
                to CILCO's
subsidiary
                AERG, a non-
registrant)
Collateral
                Agency Agreement Supplement between AERG and
The
                Bank of New York Trust Company, N.A., dated as of
February
                9, 2007
-5-