UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 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):
                                  May 30, 2003





                     CENTRAL ILLINOIS PUBLIC SERVICE COMPANY
             (Exact name of registrant as specified in its charter)




        Illinois                          1-3672                 37-0211380
(State or other jurisdiction           (Commission            (I.R.S. Employer
     of incorporation)                 File Number)          Identification No.)




               607 East Adams Street, Springfield, Illinois 62739
              (Address of principal executive offices and Zip Code)






       Registrant's telephone number, including area code: (217) 523-3600






ITEM 5. OTHER EVENTS AND REGULATION FD DISCLOSURE.

     On May 30, 2003, in a proceeding  before the Illinois  Commerce  Commission
(ICC)  involving a request for approval of an  intercompany  transfer of certain
electric  generating  facilities  between  the  Registrant's  affiliates,  Union
Electric  Company,  which  operates as  AmerenUE,  and  AmerenEnergy  Generating
Company,  AmerenUE  filed a Notice of Withdrawal  with the ICC notifying it that
AmerenUE  had  elected  not to  pursue  approval  of  the  transaction  and  was
withdrawing  its  request.  In the Notice,  AmerenUE  states  that the  concerns
expressed  by the  ICC  Staff  regarding  AmerenUE's  means  of  satisfying  its
generating   capacity  needs,   juxtaposed  with  the  Missouri  Public  Service
Commission's  (MoPSC)  views  of the  appropriate  means of  meeting  generating
capacity  obligations,  have demonstrated to AmerenUE the difficulty of a single
company  operating  as an  electric  utility  in  both  a  regulated  generation
jurisdiction such as Missouri and an unregulated generation jurisdiction such as
Illinois.  To remedy this difficulty,  AmerenUE announced in the Notice its plan
to  limit  its  public  utility  operations  to the  State  of  Missouri  and to
discontinue  operating as a public utility subject to ICC  regulation.  AmerenUE
intends to accomplish this plan by transferring its Illinois-based  electric and
natural gas businesses,  including its  Illinois-based  distribution  assets and
personnel and certain of its transmission assets, to the Registrant.  AmerenUE's
electric  generating   facilities  and  certain  of  its  electric  transmission
facilities in Illinois would not be part of the transfer.

     The  transfer  of  AmerenUE's  Illinois-based  utility  businesses  to  the
Registrant  will require the approval of the ICC, the Federal Energy  Regulatory
Commission,  the MoPSC and the  Securities  and  Exchange  Commission  under the
provisions of the Public  Utility  Holding  Company Act of 1935.  The Registrant
cannot  predict the  ultimate  outcome of these  regulatory  proceedings  or the
timing  of the  final  decisions  of the  various  agencies.  As a  result,  the
Registrant,  at this time, is unable to estimate the impact of this  transaction
on its financial position, results of operations or liquidity.


                                    SIGNATURE

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned thereunto duly authorized.

                                            CENTRAL ILLINOIS PUBLIC
                                            SERVICE COMPANY
                                                  (Registrant)


                                            By   /s/ Martin J. Lyons
                                              ---------------------------
                                                     Martin J. Lyons
                                                        Controller
                                              (Principal Accounting Officer)


Date:  June 2, 2003