Exhibit 32.3


                           SECTION 1350 CERTIFICATION
                         OF PRINCIPAL EXECUTIVE OFFICER
                         (required by Section 906 of the
                           Sarbanes-Oxley Act of 2002)


In connection  with the report on Form 10-Q for the quarterly  period ended June
30, 2003 of Central  Illinois  Light  Company (the  "Company") as filed with the
Securities and Exchange Commission on the date hereof (the "Form 10-Q"), I, Gary
L. Rainwater,  chief executive officer of the Company,  certify,  pursuant to 18
U.S.C. ss.1350, as adopted pursuant to ss.906 of the Sarbanes-Oxley Act of 2002,
that:

(1)  The Form 10-Q fully  complies  with the  requirements  of Section  13(a) or
     15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2)  The information contained in the Form 10-Q fairly presents, in all material
     respects, the financial condition and results of operations of the Company.

Dated:  August 14, 2003



                                           /s/ Gary L. Rainwater
                                           -------------------------------
                                           Gary L. Rainwater
                                           President and Chief Executive Officer
                                           (Principal Executive Officer)




A signed  original of this written  statement  required by Section 906, or other
document authenticating, acknowledging, or otherwise adopting the signature that
appears  in the  typed  form  within  the  electronic  version  of this  written
statement  required by Section 906, has been provided to Central  Illinois Light
Company and will be retained by Central  Illinois Light Company and furnished to
the Securities and Exchange Commission or its staff upon request.