(As filed October 16, 2003)
                                                             File No. 70-[_____]

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                           APPLICATION OR DECLARATION
                                       ON
                                    FORM U-1
                                      under
                 The Public Utility Holding Company Act of 1935
                    ________________________________________

     AMEREN CORPORATION              CENTRAL ILLINOIS PUBLIC SERVICE COMPANY
     UNION ELECTRIC COMPANY          607 East Adams Street
     1901 Chouteau Avenue            Springfield, Illinois 62739
     St. Louis, Missouri 63103

               (Name of company or companies filing this statement
                   and address of principal executive offices)
                    _________________________________________

                               AMEREN CORPORATION

                 (Name of top registered holding company parent
                         of each applicant or declarant)
                    _________________________________________

                    Steven R. Sullivan, Senior Vice President
          Governmental/Regulatory Policy, General Counsel and Secretary
                             Ameren Services Company
                              1901 Chouteau Avenue
                            St. Louis, Missouri 63103

                     (Name and address of agent for service)
                    _________________________________________





              The Commission is requested to mail signed copies of
                   all orders, notices and communications to:

     Joseph H. Raybuck, Esq.                   William T. Baker, Jr., Esq.
     Managing Assistant General Counsel        Thelen Reid & Priest LLP
     Ameren Services Company                   875 Third Avenue
     1901 Chouteau Avenue                      New York, New York 10022
     St. Louis, Missouri 63103


                                       ii



ITEM 1.    DESCRIPTION OF PROPOSED TRANSACTION.
           -----------------------------------

     1.1.  Introduction.
           ------------

     Ameren Corporation ("Ameren"), whose principal business address is at 1901
Chouteau Avenue, St. Louis, Missouri 63103, is a registered holding company
under the Public Utility Holding Company Act of 1935, as amended (the "Act").(1)
Ameren directly owns all of the issued and outstanding common stock of Union
Electric Company (d/b/a "AmerenUE") and Central Illinois Public Service Company
(d/b/a "AmerenCIPS"), and indirectly through CILCORP, Inc. ("CILCORP"), an
exempt holding company, all of the issued and outstanding common stock of
Central Illinois Light Company (d/b/a "AmerenCILCO"), each of which is an
electric and gas utility company (AmerenUE, AmerenCIPS and AmerenCILCO are
collectively identified as the "Utility Subsidiaries").(2) Together, the Utility
Subsidiaries provide retail and wholesale electric service to approximately 1.7
million customers and retail natural gas service to approximately 500,000
customers in portions of Missouri and Illinois.

     AmerenUE and AmerenCIPS provide open access transmission service over their
combined transmission facilities pursuant to a single Open Access Transmission
Tariff ("OATT") on file at the Federal Energy Regulatory Commission ("FERC").
Ameren is a member of the Mid-America Interconnected Network ("MAIN"), which is
one of the ten regional electric reliability councils organized for coordinating
the planning and operation of the nation's bulk power supply. AmerenUE and
AmerenCIPS have received conditional authorization from the FERC to join the
Midwest Independent Transmission System Operator, Inc. (the "Midwest ISO")
through GridAmerica LLC, a new independent transmission company.

     AmerenCILCO is also authorized to participate in the Midwest ISO as a
transmission owner. Through its participation in the Midwest ISO, AmerenCILCO
provides open access transmission services over its transmission facilities
pursuant to the Midwest ISO OATT which is on file at the FERC.

     In May 2000, AmerenCIPS transferred all of its electric generation
facilities to Ameren Energy Generating Company ("Ameren GenCo"), an affiliated
generation-only company. Ameren GenCo, which has been certified by the FERC
pursuant to Section 32 as an "exempt wholesale generator" ("EWG"),(3) has
continued to acquire additional generation capacity since that time. Power
generated by Ameren GenCo is sold to wholesale purchasers under both cost-based

----------
(1)  See Ameren Corporation, et al., Holding Co. Act Release No. 26809 (Dec. 30,
     1997) (the "Merger Order").

(2)  The Commission authorized the formation of Ameren and its acquisition of
     AmerenUE and AmerenCIPS in the Merger Order. Ameren was authorized to
     acquire AmerenCILCO in Ameren Corporation, et al., Holding Company Act
     Release No. 27645 (Jan. 29, 2003).

(3)  AmerenGenCo. filed an application for EWG status in FERC Docket No.
     EG00-117-000 on March 23, 2000, as amended on May 18, 2000. The EWG status
     of Ameren GenCo was affirmed by the FERC in Ameren Energy Generating
     Company, 92 FERC P. 62,023 (July 14, 2000); Ameren Energy Generating
     Company, 93 FERC P. 62,210 (December 18, 2000).


                                       1



and market-based rates which are subject to the jurisdiction of the FERC. As of
December 31, 2002, Ameren GenCo had approximately 4,675 MW of total installed
generating capacity. The generation facilities of AmerenUE and those of Ameren
GenCo, are dispatched in a coordinated manner in accordance with the terms of a
Joint Dispatch Agreement on file at the FERC. The Joint Dispatch Agreement
requires each company to serve its load requirements from its own least-cost
generation first, but then allows the other company to have access to any
available excess generating capacity at cost.

     Power generated from AmerenCILCO's generating units is not subject to the
Joint Dispatch Agreement, but instead is dispatched separately from
AmerenCILCO's control area, which is separate from, and adjacent to, the Ameren
control area.

     In addition to AmerenUE, AmerenCIPS and CILCORP, Ameren owns directly all
of the issued and outstanding common stock of, inter alia, Ameren Energy
Resources Company ("AERC"), which is an intermediate non-utility holding
company. AERC directly and indirectly holds the securities of other exempt and
authorized non-utility companies, including, insofar as relevant to this
Application/Declaration, Ameren GenCo, Ameren Energy Marketing Company ("AEM"),
and Ameren Energy Fuels and Services Company ("AFS"), the last two of which are
"energy-related" companies under Rule 58.

     1.2  Summary of Requested Approvals.
          ------------------------------

     Authorization is sought herein for certain transactions (the "Illinois
Asset Transfer") that will result in the acquisition by AmerenCIPS of AmerenUE's
electric transmission and distribution assets in Illinois other than those
associated with AmerenUE's Venice, Illinois generating plant, its Keokuk, Iowa
generating plant, and also minor amounts of property in Illinois to be retained
by AmerenUE to ensure the smooth operation of its electric utility system in
Missouri (the "Retained Assets"). The Illinois Asset Transfer will also result
in the acquisition by AmerenCIPS of AmerenUE's retail gas distribution
facilities in Illinois (the assets to be acquired by AmerenCIPS are identified
collectively herein as the "Acquired Assets").(4) The Acquired Assets will be
transferred to AmerenCIPS at their net book value. Approximately one-half of the
Acquired Assets (designated as "Transferred Assets") will be transferred by
AmerenUE directly to AmerenCIPS in consideration for AmerenCIPS' promissory
note, the form of which is filed herewith as Exhibit B-3, and approximately
one-half of the Acquired Assets (designated as "Dividend Assets") will be
transferred to AmerenCIPS by means of a dividend in kind from AmerenUE to Ameren
followed by a contribution of the Dividend Assets by Ameren to AmerenCIPS.(5) In
connection with the Illinois Asset Transfer, AmerenCIPS will assume certain

----------
(4)  An application to implement the Illinois Asset Transfer was previously
     filed with the Commission in December 2000 in Ameren Corporation, et al.,
     File No. 70-9805. However, that application was subsequently withdrawn by
     letter dated August 20, 2001 before the application was acted upon by the
     Commission.

(5)  The Asset Transfer Agreement provides for AmerenUE to prepare a schedule to
     be delivered at the time of closing which specifically enumerates the
     assets, properties and rights to be acquired by AmerenCIPS. The schedule
     will further designate whether such specific assets are to be conveyed as
     Dividend Assets or Transferred Assets. The percentages of Acquired Assets
     that are to be conveyed as Transferred Assets and as Dividend Assets,
     respectively, will be determined by Ameren immediately prior to the
     closing.


                                       2



obligations of AmerenUE that are associated with the Acquired Assets. These
transactions will be consummated in accordance with the Asset Transfer
Agreement, the form of which is filed herewith as Exhibit B-1.

     In addition to the foregoing, AmerenUE is requesting authorization herein
to acquire from Ameren GenCo four 44 MW combustion turbine generator ("CTG")
units and four 35 MW CTG units located at Ameren GenCo's Pinckneyville, Illinois
facility (the "Pinckneyville Plant") and two 116 MW CTG units located at Ameren
GenCo's Kinmundy, Illinois generation facility (the "Kinmundy Plant") and, in
conjunction therewith, to assume certain liabilities and obligations of Ameren
GenCo related to such units (the "Generation Transfer"). These assets will also
be transferred at their net book value. The terms of these transactions are set
forth in the form of Asset Transfer Agreement-Pinckneyville Generation Station
between Ameren GenCo and AmerenUE (Exhibit B-5) and the form of Asset Transfer
Agreement-Kinmundy Generation Station between Ameren GenCo and AmerenUE (Exhibit
B-6).

     1.3  Reasons for Proposed Transactions.
          ---------------------------------

     AmerenUE provides electric service to about 1.2 million retail and
wholesale customers in Missouri and in parts of Illinois, and provides natural
gas service to approximately 130,000 customers in those states. AmerenUE also
provides wholesale full requirements service to certain municipal electric
utilities in Missouri. AmerenUE's peak load in 2002 was 8,643 MW. AmerenUE
currently owns approximately 8,000 MW of generation capacity. Power from these
generation resources, as supplemented by power purchased by AmerenUE from
others, is used to supply the demands of its electric service customers.
AmerenUE is subject to regulation with respect to retail sales of natural gas
and electricity in Missouri by the Missouri Public Service Commission ("MoPSC")
and with respect to retail sales of natural gas and electricity in Illinois by
the Illinois Commerce Commission ("ICC").

     As a regulated electric utility in Missouri, it is incumbent upon AmerenUE
to have or to acquire sufficient generating capacity with which to serve the
forecasted demands of its electric service customers and to maintain an adequate
reserve margin. Standards established by MAIN require AmerenUE to meet certain
minimum short-term and long-term planning reserve requirements, which currently
are 15% for 2003 and 17% for 2006.

     In July 2002, AmerenUE entered into a Stipulation and Agreement in order to
resolve certain retail rate issues in Missouri. The Stipulation and Agreement
(Exhibit B-4 hereto) fixes retail electric service rates for AmerenUE in
Missouri that, except under certain specified conditions, will remain in place
without modification through June 30, 2006. AmerenUE also agreed to undertake
commercially reasonable efforts to make energy infrastructure investments
totaling $2.25 billion to $2.75 billion from January 1, 2002 through June 30,
2006. This includes the obligation to acquire 700 MW of new generating capacity,
which may be satisfied by the purchase of generation facilities from an
affiliate "at net book value." The Stipulation and Agreement also requires
AmerenUE to make enhancements to its transmission infrastructure.

         The Generation Transfer is intended as an efficient means of enabling
AmerenUE to meet its generation capacity obligations under the Stipulation and
Agreement and under the MAIN standards. AmerenUE needs 543 MW of additional


                                       3



generation capacity in 2003 and 991 MW of additional generation resources by
2006 in order to meet the applicable MAIN generation capacity requirements. The
Generation Transfer will provide AmerenUE with a total of 548 MW of additional
generating capacity, which will be acquired at the net book value of the
Pinckneyville and Kinmundy Plants. Because both the Pinckneyville Plant and the
Kinmundy Plant are connected directly to the Ameren transmission system with no
operating guide restrictions, concerns over the availability of transmission
capacity to allow delivery of power from those units reliably to AmerenUE are
obviated. Additionally, the Pinckneyville Plant has black start capability and
can be ramped up quickly to provide service, which will allow AmerenUE to
respond quickly to system emergencies.

     The regulatory regime under which AmerenUE operates in Illinois is very
different from that which exists in Missouri. Although Missouri law does not
authorize competition in retail electric service markets, the Illinois Electric
Service Customer Choice and Rate Relief Law (the "Customer Choice Law"), which
was enacted in 1997, permits retail electric service customers in Illinois to
purchase power from alternative power suppliers. Nevertheless, AmerenUE
continues to be regulated as an electric public utility in Illinois. Therefore,
as long as AmerenUE continues to provide retail electric utility service in
Illinois, it will need approval of the ICC to consummate the Generation
Transfer.

     The ICC Staff has expressed concerns about the terms of the Generation
Transfer and has recommended that the ICC deny approval of the Generation
Transfer as proposed. For that reason, AmerenUE has advised the ICC that it
intends to limit its public utility operations to Missouri and to discontinue
operating as a public utility subject to ICC regulation. In so doing, AmerenUE
explained that the concerns expressed by the ICC Staff regarding the means by
which AmerenUE proposes to satisfy its generating capacity needs, juxtaposed
with the MoPSC views of this matter, has demonstrated the difficulty for a
single company to operate as an electric utility in both a regulated generation
jurisdiction such as Missouri and an unregulated generation jurisdiction such as
Illinois.

     The effect of the proposed Illinois Asset Transfer is to transfer to and
consolidate within AmerenCIPS responsibility for serving electric and gas
utility customers in Illinois that are currently served by AmerenUE. Upon the
transfer of AmerenUE's retail electric and gas assets in Illinois, AmerenCIPS
will succeed to AmerenUE's retail utility operations in Illinois and will
provide the retail electric and gas services currently provided by AmerenUE
pursuant to the ICC-approved tariffs currently in effect for AmerenUE.

     The Illinois Asset Transfer will realign the retail electric and gas
utility operations of Ameren so that AmerenUE will be regulated as a public
utility only in Missouri. Because AmerenUE will not be a regulated utility in
Illinois, it will not be required to make regulatory filings in Illinois after
the Illinois Asset Transfer.(6) Most significantly, after the Illinois Asset

----------
(6)  AmerenUE will continue to own and operate generation facilities that are
     located in Illinois, together with minor amounts of other facilities to
     ensure the smooth operation of its electric system. However, because it
     will no longer have a public service obligation to provide retail electric
     or natural gas service in Illinois, AmerenUE will not be subject to
     regulatory requirements established by the ICC.


                                       4



Transfer has been consummated, it will not be necessary for AmerenUE to obtain
ICC authorization in order to acquire the Pinckneyville Plant and the Kinmundy
Plant from Ameren GenCo. The transfer to AmerenCIPS of retail electric service
loads in Illinois that are currently served by AmerenUE will also help to reduce
the amount of generation capacity that AmerenUE needs to maintain in order to
comply with MAIN generation capacity standards.

     1.4  Illinois Asset Transfer-Overview
          --------------------------------

     Pursuant to the Asset Transfer Agreement, AmerenUE will transfer its
electric transmission and distribution and gas distribution assets and
associated general plant assets and related liabilities in Illinois to
AmerenCIPS. As referenced above, AmerenUE would retain generating facilities and
also minor amounts of other facilities in Illinois. AmerenUE will also assign
all related obligations to AmerenCIPS, including without limitation, the
certificates of public convenience and necessity granted by the ICC authorizing
AmerenUE to provide electric utility service and gas utility service in
Illinois, environmental permits and obligations, all municipal and county
franchises, labor agreements (as applicable), and any other relevant agreements
that exist as of the transfer date. After the Illinois Asset Transfer, the
Acquired Assets will be utilized by AmerenCIPS in its electric and natural gas
utility business in Illinois.

     At the present time, AmerenUE personnel operate and maintain the Acquired
Assets in conjunction with their other responsibilities. It is expected that
after the Illinois Asset Transfer has been consummated, certain AmerenUE
employees responsible for operation and maintenance of these facilities may be
transferred to AmerenCIPS. Other employees of AmerenUE, who are responsible for
substation and transmission maintenance and for protective relay installation,
testing and maintenance, may also spend a portion of their time operating and
maintaining the Acquired Assets for AmerenCIPS for the life of those
facilities.(7) The continued use of AmerenUE personnel will enable AmerenCIPS to
avoid the inconvenience and additional costs associated with hiring and training
additional personnel for this purpose.

     The Illinois Asset Transfer is planned to be accomplished in the following
manner:

     1.   AmerenUE will transfer approximately 50% of the Acquired Assets to
          AmerenCIPS in exchange for AmerenCIPS' subordinated promissory note in
          a principal amount equal to approximately 50% of the total net book
          value of such Acquired Assets net of liabilities, which is estimated
          to be approximately $69 million.(8)

----------
(7)  The Commission recognized in the Merger Order that AmerenUE may provide
     services to AmerenCIPS, including services of linemen and gas trouble
     crews, that are incidental to its utility business. These services will be
     provided at cost in accordance with the standards of the Act and the
     Commission's rules and regulations under the Act.

(8)  Proposed listings of the assets to be transferred to AmerenCIPS and the
     associated liabilities to be assumed by AmerenCIPS and the related journal
     accounting entries are contained in Exhibit B-2 hereto.


                                       5



     2.   AmerenUE will hold the note and receive payments including interest
          from AmerenCIPS.

     3.   AmerenUE will declare an "in kind" dividend to Ameren equal to the
          remaining balance (approximately 50%) of the net book value of the
          Acquired Assets net of liabilities, estimated to be approximately $69
          million.

     4.   Ameren will then contribute the Dividend Assets and associated
          liabilities to AmerenCIPS.

     The Commission determined in the Merger Order that the existing electric
transmission and distribution facilities of AmerenCIPS and AmerenUE are
physically interconnected and operated as a single integrated electric utility
system. Likewise, the Commission held in the Merger Order that the combined gas
utility properties of AmerenUE and AmerenCIPS constitute an integrated gas
utility system. The Illinois Asset Transfer will not affect the coordinated
operation of any electric transmission or distribution plant, which will
continue to be operated in the same manner, by the same personnel, and with the
same degree of safety and reliability, as they are today. Similarly, the
transfer of the gas distribution assets of AmerenUE will not affect the
coordinated operation of the existing gas utility properties of AmerenUE and
AmerenCIPS.

     1.5  Generation Transfer-Overview
          ----------------------------

     The Pinckneyville Plant and the Kinmundy Plant, which were installed by
Ameren GenCo in 2001, are integrated into the Ameren system. The Pinckneyville
Plant consists of four simple cycle combustion turbines rated at approximately
44 MW each at summer peak conditions, and four combustion turbines rated at
approximately 35 MW each at summer peak conditions. The Kinmundy Plant consists
of two combustion turbines with dual fuel capability which are rated at
approximately 116 MW each under summer peak conditions. Since their acquisition
by Ameren GenCo, these generating units have proven themselves to be superior
performing generating assets that have served the Ameren system reliably.

     Under the terms of the Transfer Agreements, AmerenUE will purchase the
Pinckneyville Plant and the Kinmundy Plant for cash and will acquire associated
assets and obligations from Ameren GenCo based on the net book value of the
assets and obligations being transferred as of the closing date. The net
depreciated book value of generation facilities at the Pinckneyville Plant as of
April 30, 2003 was approximately $158.7 million ($502/kW). The net depreciated
book value of generation facilities at the Kinmundy Plant as of April 30, 2003
was approximately $95.4 million ($411/kW). AmerenUE will also acquire certain
assets (fuel stock, materials and supplies and prepaid insurance) and assume
certain obligations of Ameren GenCo (primarily property tax accruals) that are
associated with the generating units being transferred. The detailed accounting
treatment of the Generation Transfer is set forth in Exhibit FS-10.


                                       6



ITEM 2.    FEES, COMMISSIONS AND EXPENSES.

     A statement of the fees, commissions and expenses incurred or to be
incurred in connection with the transactions proposed herein will be supplied by
amendment.

ITEM 3.    APPLICABLE STATUTORY PROVISIONS.

     The following sections of the Act and the Commission's rules thereunder are
or may be applicable to the transactions proposed herein:

--------------------------------------------------------------------------------
Sections of the Act             Transactions to which section or rule may be
-------------------             applicable
--------------------------------------------------------------------------------
6(a), 7, 9(a), 10 and 12        Issuance of a promissory note by AmerenCIPS in
                                connection with the acquisition of the
                                Transferred Assets and acquisition thereof by
                                AmerenUE
--------------------------------------------------------------------------------
9(a)(1), 10                     Acquisition of Acquired Assets by AmerenCIPS;
                                acquisition of Pinckneyville and Kinmundy Plant
                                assets by AmerenUE
--------------------------------------------------------------------------------
12(b)                           Assumption of obligations of AmerenUE by
                                AmerenCIPS in connection with Illinois Asset
                                Transfer and assumption of obligations of
                                AmerenGenCo by AmerenUE
--------------------------------------------------------------------------------
12(c)                           In-kind distribution of Dividend Assets by
                                AmerenUE to Ameren
--------------------------------------------------------------------------------
12(b)                           Contribution of Dividend Assets by Ameren to
                                AmerenCIPS
--------------------------------------------------------------------------------
9(b)(1), 12(d), 12(f)           Sale of Transferred Assets by AmerenUE to
                                AmerenCIPS and acquisition thereof by AmerenCIPS
--------------------------------------------------------------------------------
Rules
-----
--------------------------------------------------------------------------------
43, 44                          Sale of Transferred Assets by AmerenUE to
                                AmerenCIPS
--------------------------------------------------------------------------------
45                              Contribution of Dividend Assets by Ameren to
                                AmerenCIPS and assumption by AmerenCIPS of
                                liabilities of AmerenUE
--------------------------------------------------------------------------------


                                       7



--------------------------------------------------------------------------------
46                              In-kind distribution of Dividend Assets by
                                AmerenUE to Ameren
--------------------------------------------------------------------------------

     Section 32 of the Act and Rule 54 thereunder are also generally applicable
to the transactions described above. To the extent that other sections of the
Act or the Commission's rules thereunder are deemed to be applicable to the
Illinois Asset Transfer, such sections and rules should be considered to be set
forth in this Item 3.

     A.   Illinois Asset Transfer
          -----------------------

     Section 6(a) of the Act provides that it is unlawful for any registered
holding company or subsidiary thereof "to issue or sell any security of such
company" except in accordance with an order of the Commission issued pursuant to
Section 7 of the Act. Correspondingly, Section 12(b) of the Act requires
Commission authorization for a registered public utility holding company or
subsidiary thereof "to lend or in any manner extend its credit to or indemnify
any company in the same holding-company system." As a result, the issuance of a
promissory note by AmerenCIPS to AmerenUE and the assumption by AmerenCIPS of
certain obligations of AmerenUE relating to the Acquired Assets require prior
Commission approval under Sections 6, 7, and 12(b) of the Act.

     Section 9(a)(1) of the Act declares that it shall be unlawful for any
registered holding company or subsidiary thereof to acquire any utility assets
or any securities unless the acquisition of such assets or securities has been
approved by the Commission pursuant to Section 10 of the Act. However, Section
9(b)(1) of the Act exempts from the requirements of Section 9(a) any
"acquisition by a public-utility company of utility assets the acquisition of
which has been expressly authorized by a State commission."

     Section 12(c) of the Act declares that it shall be unlawful for any
registered holding company or subsidiary thereof to declare or pay any dividend
on any security except in accordance with such rules and regulations or orders
as the Commission may adopt with respect to issuance of dividends. The
applicable standards for declaration and payment of dividends are set forth in
Rule 46.

     Section 12(d) of the Act states that it is unlawful for a registered
holding company to sell any utility assets in contravention of rules and
regulations or orders as the Commission shall adopt. Section 12(f) of the Act
requires Commission approval for a subsidiary of a registered holding company to
sell utility assets to any affiliate or associate company.

     As set forth below, the Illinois Asset Transfer complies with all of the
applicable provisions of the Act and should be approved by the Commission.


                                       8



     1.   Sections 6(a) and 12(b)
          -----------------------

     As indicated, the promissory note to be issued by AmerenCIPS will be in an
amount equal to approximately 50% of the net book value of the Transferred
Assets, which is estimated to be approximately $69 million. The promissory note
will have a fixed rate of interest based on interest rates charged for
generally-comparable unsecured five-year notes issued by companies whose credit
quality and bond ratings are comparable to those of AmerenCIPS. The yield of
5-year U.S. Treasury Notes and of U.S. Treasury Notes and Bonds having 5 years
remaining until maturity may be used as a benchmark to establish the interest
rate for the promissory note. Based on the current yield of the 5-year U.S.
Treasury Notes plus a credit spread between yields of U.S. Treasury Notes and
yields on generally-comparable unsecured corporate notes derived from a variety
of external sources, current interest rate levels for the promissory note would
be approximately 4.0%.

     Although the initial term of the promissory note will be five years,
payments of amounts due under the promissory note will be based on a ten-year
amortization schedule. Accordingly, a balloon payment will become due at the end
of the fifth year unless the note's term is extended for an additional five
years by agreement of the parties. The promissory note will be unsecured and
will be subordinate to all other debt of AmerenCIPS, whether incurred currently
or in the future, except indebtedness which, by its terms, provides that such
indebtedness is not superior in right of payment of principal of or interest on
the promissory note or that such indebtedness is subordinated to all other
indebtedness of AmerenCIPS.

     In addition, AmerenCIPS will assume all obligations of AmerenUE relating to
its utility business of transmitting and distributing electricity and natural
gas in Illinois. As shown in Exhibit B-2 hereto, these obligations include trade
payables relating to such businesses, accounts payable, accrued payroll, accrued
vacation liabilities, customer liabilities, environmental liabilities and taxes.
AmerenCIPS will also assume all maintenance and labor agreements (as applicable)
and any similar agreements relating to the Acquired Assets as those agreements
exist on the transfer date.

     Section 6(a) requires the issuance of an order of the Commission pursuant
to Section 7 of the Act before a registered holding company or subsidiary
thereof may issue any security. Section 7(c)(2)(B) of the Act provides that the
Commission shall not permit a declaration regarding the issue or sale of any
security to become effective unless it finds, inter alia, that "such security is
to be issued or sold solely...for the purpose of financing the business of the
declarant as a public utility company." Section 7(d) further provides that if
the requirements of Section 7(c) and Section 7(g) of the Act are satisfied:

          The Commission shall permit a declaration regarding the issue or
          sale of a security to become effective unless the Commission
          finds that--

                    (1) the security is not reasonably adapted to the security
               structure of the declarant and other companies in the same
               holding company system;


                                       9



                    (2) the security is not reasonably adapted to the earning
               power of the declarant.
                    (3) financing by the issue and sale of the particular
               security is not necessary or appropriate to the economical and
               efficient operation of a business in which the applicant lawfully
               is engaged or has an interest;
                    (4) the fees, commissions, or other remuneration, to
               whomsoever paid, directly or indirectly, in connection with the
               issue, sale or distribution of the security are not reasonable.
                    (5) in the case of a security that is a guaranty of, or
               assumption of liability on, a security of another company, the
               circumstances are such as to constitute the making of such
               guaranty or the assumption of such liability an improper risk for
               the declarant.
                    (6) the terms and conditions of the issue or sale of the
               security are detrimental to the public interest or the interest
               of investors or consumers.

     In this case, the promissory note to be issued by AmerenCIPS is to be used
for the purpose of financing expansion of its business as a public utility
company in Illinois by acquiring the electric utility and gas utility operations
of AmerenUE in Illinois. Pursuant to the Asset Transfer Agreement, AmerenCIPS
will acquire not only certain transmission and distribution assets, but also
AmerenUE's retail electric business in Illinois, including the certificates of
public convenience and necessity granted by the ICC authorizing AmerenUE to
provide retail electric service in Illinois, environmental permits, all
municipal and county franchises, and any other relevant agreements.
Additionally, AmerenCIPS will acquire both AmerenUE's gas assets in Illinois and
all related obligations, including the certificates of public convenience and
necessity granted by the ICC authorizing AmerenUE to provide gas utility service
in Illinois, environmental permits, all municipal and county franchises, and any
other relevant agreements. As noted above, the Illinois Asset Transfer is being
financed in part by the issuance of the promissory note by AmerenCIPS. It is
therefore evident that issuance of the promissory note by AmerenCIPS is
consistent with Section 7(c)(2)(B) of the Act.

     The issuance of the promissory note is also consistent with the criteria
established in Section 7(d) of the Act. As of June 30, 2003, the total
capitalization of AmerenCIPS was $1,040 million, of which 47% is long-term debt
(including current maturities of long-term debt), 7% is preferred stock, and 46%
is common equity capital. The acquisition of assets by AmerenCIPS from AmerenUE
is being financed in approximately equal parts by the promissory note to be
issued by AmerenCIPS and by a capital contribution by Ameren. Because debt and
equity of AmerenCIPS will increase in the same amount, the capital structure of
AmerenCIPS after the Illinois Asset Transfer will be substantially the same as
its present capital structure. Thus, pro forma financial statements reflecting
the Illinois Asset Transfer show that after the Illinois Asset Transfer, the
capitalization of AmerenCIPS will be approximately 47% debt, 7% preferred stock,
and 46% common equity.

     The 50% note and 50% dividend structure of the transaction will also
maintain a capital structure at AmerenUE that is substantially similar after the
Illinois Asset Transfer as compared to the present capital structure. The


                                       10



capital structure of AmerenUE as of June 30, 2003 and the pro forma capital
structure of AmerenUE after the Illinois Asset Transfer are as follows:

     Security                        Ratio as of           Ratio
     --------                        June 30, 2003         After Transfer
                                     -------------         --------------

     Long-Term Debt
     (inc. current maturities)             41%                   42%

     Preferred Stock                        2%                    2%

     Common Equity                         57%                   56%

     Total                                100%                  100%

     Moreover, the combination of the utility assets of AmerenUE in Illinois
with the utility assets of AmerenCIPS will result in efficiencies and economies
through elimination of duplicative regulatory burdens, and will thereby produce
savings for the benefit of the public and consumers and investors of AmerenCIPS.

     A statement of the fees, commissions and expenses associated with the
Illinois Asset Transfer will be provided by amendment to this Application or
Declaration (see, Item 2 - Fees, Commissions and Expenses). It is believed that
the estimated fees and expenses in this matter will bear a fair relation to the
book value of the assets being transferred and the benefits to be achieved by
AmerenUE and AmerenCIPS as a result of the Illinois Asset Transfer.

     To the extent that AmerenCIPS is assuming liabilities of AmerenUE that are
associated with the Acquired Assets, the assumption of such liabilities is not
an improper risk for AmerenCIPS. The Acquired Assets represent a part of a going
concern and are capable of generating revenues sufficient to meet the
obligations being assumed by AmerenCIPS. It is therefore reasonable for
AmerenCIPS to assume the risks associated with the Acquired Assets.

     Finally, the terms and conditions of the promissory note as described above
are not detrimental to the public interest or the interest of investors or
consumers. The promissory note will carry a market rate of interest, will have a
relatively short term, and will be subordinated to other debt of AmerenCIPS.

     2.   Sections 12(d) and 12(f)
          ------------------------

     Sections 12(d) and 12(f) of the Act contemplate that where a transaction
involves sale of utility assets by one utility in a holding company system to an
associate company, the Commission may evaluate the fairness of the consideration
to be paid and received for such sale by both the buyer and seller. In Entergy
Corporation, et al., Holding Co. Act Release No. 25136, 46 SEC Docket 1560 at
1571 (1990), the Commission ruled that "as noted above in the discussion of
section 10(b)(2), the Commission believes that section 12(d) is satisfied by the


                                       11



intrasystem sales of assets at depreciated book value on an after tax basis."
The terms of the Illinois Asset Transfer are consistent with this policy.

     The transfer of the Acquired Assets from AmerenUE to AmerenCIPS on the
basis of their net book value as recorded on the books and records of AmerenUE
is reasonable for several reasons. The Acquired Assets are primarily electric
and natural gas facilities for which there is a limited market. After the
Illinois Asset Transfer has occurred, those assets will continue to be used by
AmerenCIPS to provide electric and natural gas service at regulated rates that
are subject to regulation by the ICC. Electric service customers being
transferred from AmerenUE to AmerenCIPS will continue to pay the rates they are
currently charged under AmerenUE's tariff at least until December 31, 2006. It
is expected that any cost-of-service study performed thereafter in order to
evaluate the reasonableness of rates being charged for service to those
customers would impute a value to the Acquired Assets based on their book cost
depreciated.

     3.   Sections 9(a)(1) and 10
          -----------------------

     Section (9)(a)(1) of the Act requires the approval of the Commission
pursuant to Section 10 of the Act before a registered holding company or
subsidiary thereof may acquire utility assets or any securities. Section 10(b)
provides that, if the requirements of Section 10(f) are satisfied, the
Commission shall approve an acquisition under Section 9(a) unless the Commission
finds that:

     (1)  such acquisition will tend towards interlocking relations or the
          concentration of control of public-utility companies, of a kind or to
          an extent detrimental to the public interest or the interests of
          investors or consumers;

     (2)  in case of the acquisition of securities or utility assets, the
          consideration, including all fees, commissions, and other
          remuneration, to whomsoever paid, to be given, directly or indirectly,
          in connection with such acquisition is not reasonable or does not bear
          a fair relation to the sums invested in or the earning capacity of the
          utility assets to be acquired or the utility assets underlying the
          securities to be acquired; or

     (3)  such acquisition will unduly complicate the capital structure of the
          holding-company system of the applicant or will be detrimental to the
          public interest or the interests of investors or consumers or the
          proper functioning of such holding-company system.

     Clearly, in this case, the acquisition of the Acquired Assets by AmerenCIPS
will not contribute to an undue concentration of control of public utility
assets. Both AmerenCIPS and AmerenUE are subsidiaries of Ameren, which, as their


                                       12



corporate parent, has ultimate control over both subsidiaries and their public
utility assets. Ameren's control over these assets will not be affected by the
proposed Illinois Asset Transfer.

     The amounts to be paid by AmerenCIPS bear a fair relation to the sums
invested in and the earning capacity of the Acquired Assets. The Acquired Assets
are being transferred at their book value net of liabilities. It is estimated
that as of December 31, 2003, the net book value of the transmission and
distribution assets to be acquired by AmerenCIPS net of liabilities is $126.2
million, and the net book value of the gas assets to be acquired by AmerenCIPS
net of liabilities is $11.7 million. The rates for electric and natural gas
service provided by AmerenUE in Illinois are cost-based rates that are
predicated in part on the book value of these assets. It is thus evident that
the amount to be paid by AmerenCIPS is consistent with Section 10(b)(2) of the
Act.

     As noted above, the acquisition of the Acquired Assets by AmerenCIPS will
not unduly complicate its capital structure. Approximately one-half of the
Acquired Assets will be transferred to AmerenCIPS through distribution by
AmerenUE to Ameren followed by contribution of such assets to AmerenCIPS, and
the remainder will be transferred to AmerenCIPS in return for a promissory note.
As a result, the transaction will not have a significant effect on the capital
structure of AmerenCIPS.

     The acquisition of the Acquired Assets by AmerenCIPS will not have an
adverse effect on the interests of consumers of either AmerenUE or AmerenCIPS.
Existing and new retail electric service customers of AmerenCIPS will continue
to be served in accordance with tariffs that have previously been approved by
the ICC. Rates of captive retail electric service customers currently served by
AmerenCIPS are not subject to change prior to January 1, 2007, when the
transition to full retail customer choice in Illinois will be completed.

     AmerenCIPS has an electricity supply agreement with AEM pursuant to which
it purchases its full requirements for electricity at demand and energy charges
that are fixed and not subject to modification prior to December 31, 2004.
Pursuant to an order of the ICC in Docket No. 02-0428, AmerenCIPS will seek to
extend this agreement to December 31, 2006 under the same terms and conditions.
AEM has sufficient generation capacity available to be able to accommodate the
additional load being transferred to AmerenCIPS. The stability provided by this
contract will insulate retail electric service customers in Illinois that
transfer from AmerenUE to AmerenCIPS from any meaningful risk of a rate increase
during the term of that electricity supply agreement. Thereafter, AmerenCIPS
will purchase electricity needed to serve all of its customers under competitive
market conditions.

     Finally, AmerenCIPS and AmerenUE have integrated their gas utility
operations and rely extensively on support services provided by Ameren Services
Company and AFS. Moreover, AmerenCIPS will adopt the service classifications and
rates in AmerenUE's retail tariffs for natural gas service in Illinois and will
assume the obligations of AmerenUE under certificates of public convenience and
necessity granted by the ICC and all municipal and county franchises authorizing
AmerenUE to provide gas utility service in Illinois. Therefore, insofar as the
natural gas service customers of AmerenUE in Illinois are concerned, the


                                       13



Illinois Asset Transfer will simply result in a change in name of their service
provider without having any impact on the quality or cost of service provided.

     Section 10(c) of the Act provides that, notwithstanding the provisions of
Section 10(b), the Commission shall not approve:

     (1)  an acquisition of securities or utility assets, or of any other
          interest, which is unlawful under the provisions of section 8 or is
          detrimental to the carrying out of the provisions under section 11; or

     (2)  the acquisition of securities or utility assets of a public utility or
          public utility holding company unless the Commission finds that such
          acquisition will serve the public interest by tending towards the
          economical and the efficient development of an integrated public
          utility system.

     The Commission approved the formation of Ameren and its acquisition of
AmerenUE and AmerenCIPS in 1997. The Commission concluded at that time that the
combined electric properties of AmerenUE and AmerenCIPS would be an integrated
electric system and that "the proposed acquisition by Ameren of this electric
integrated system will `ten[d] towards the economical and efficient development
of an integrated public-utility system,' and so satisfy the requirements of
section 10(c)(2) of the Act."(9) The Commission further concluded that the gas
properties of AmerenUE and AmerenCIPS "constitute a gas integrated system within
the meaning of section 2(a)(29)(B) of the Act."(10) The transfer of the Acquired
Assets from AmerenUE to AmerenCIPS will not affect the integrated operation of
these facilities. It is thus evident that Section 10(c) of the Act does not
preclude issuance of a Commission order authorizing acquisition of the Acquired
Assets by AmerenCIPS.

     4.   Section 12(c)
          -------------

     The Dividend Assets are to be transferred through distribution of an
in-kind dividend by AmerenUE to Ameren, and a capital contribution by Ameren to
AmerenCIPS. Section 12(c) of the Act precludes the declaration or payment of a
dividend by a registered holding company or subsidiary thereof:

          ...in contravention of such rules and regulations or orders as
          the Commission deems necessary or appropriate to protect the
          financial integrity of companies in holding-company systems, to
          safeguard the working capital of public-utility companies, to
          prevent the payment of dividends out of capital or unearned
          surplus, or to prevent the circumvention of the provisions of
          this title or the rules, regulations, or orders thereunder.

----------
(9)  See Merger Order, 66 SEC Docket at 490, fn. 17.

(10) Id. at 491.


                                       14



     The only relevant rule adopted by the Commission relating to declaration or
payment of dividends by a subsidiary company of a registered public utility
holding company is Rule 46(a), which precludes payment of a dividend "out of
capital or unearned surplus, except pursuant to a declaration notifying the
Commission of the proposed transaction, which has become effective in accordance
with the procedure specified in ss.250.23." As of June 30, 2003, AmerenUE had
retained earnings in excess of $1.4 billion. The distribution of the Dividend
Assets will result in a charge against retained earnings of AmerenUE of
approximately $69 million. It is therefore evident that AmerenUE has sufficient
retained earnings in which to make an in-kind dividend to Ameren for the purpose
of implementing the Illinois Asset Transfer.

     B.   Generation Transfer
          -------------------

     As noted above, Ameren GenCo is an EWG. Section 32(e) of the Act provides
in pertinent part that an EWG "shall be exempt from all provisions of this Act."
Therefore, the participation of Ameren GenCo in the Generation Transfer does not
require Commission authorization. However, the acquisition of the Pinckneyville
Plant and the Kinmundy Plant by AmerenUE is subject to the requirements of
Sections 9(a)(1) and 10 of the Act, and the assumption by AmerenUE of certain
obligations of Ameren GenCo is subject to Rule 45.

     The standards established by Sections 9(a) and 10 of the Act for
acquisition of utility assets by a subsidiary of a registered public utility
holding company are set forth above. The Generation Transfer is consistent with
these standards.

     The acquisition of the Pinckneyville Plant and the Kinmundy Plant by
AmerenUE will not contribute to an undue concentration of control of public
utility assets. AmerenUE and Ameren GenCo are affiliated entities within the
Ameren corporate family, and their respective generation facilities are already
being dispatched in accordance with the Joint Dispatch Agreement. Because the
transaction will involve only the intra-corporate transfer of generation
facilities, it will not affect concentration of control of generation assets.
Although the Generation Transfer will increase the amount of generation capacity
owned by AmerenUE, such capacity is needed by AmerenUE to meet its existing
public service obligations in Missouri and maintain an adequate generation
capacity reserve margin.

     The amounts to be paid by AmerenUE bear a fair relation to the sums
invested in and the earning capacity of the Pinckneyville Plant and the Kinmundy
Plant. As noted above, these plants are to be acquired by AmerenUE at their net
book value (i.e., original cost of construction less accumulated depreciation).
Power from these units will be sold primarily to retail electric service
customers in Missouri at cost-based rates which are subject to regulation by the
MoPSC. The transaction will therefore be consistent with the standards for
intra-corporate asset transfers cited above.

     The price at which AmerenUE will acquire the Pinckneyville Plant and the
Kinmundy Plant is also consistent with the price of capacity from alternative
sources that were considered by AmerenUE. Prior to entering into this
transaction, AmerenUE undertook an Asset Mix Optimization Analysis, which showed
that the addition of a mix of simple cycle and combined cycle combustion
turbines during its planning horizon would satisfy AmerenUE's needs on a


                                       15



least-cost planning basis. AmerenUE then evaluated a number of options for
obtaining the energy and capacity needed to meet its reliability and customer
service obligations, including the purchase of power from other wholesale energy
suppliers, the purchase of existing generation assets from non-affiliated
generation owners, and the construction of new capacity, as well as the
Generation Transfer. None of these alternatives were entirely satisfactory.

     In the fall of 2001, AmerenUE issued a Request for Proposals for capacity
and energy with the intent of purchasing up to 500 MW of capacity for the time
period of 2002 through 2011. The Net Present Value of offers of power submitted
in response to this RFP, coupled with the construction of simple cycle
combustion turbine generators at the end of the 10-year contracting period
(2002-2011), were comparable to the cost to AmerenUE of purchasing the
Pinckneyville Plant and the Kinmundy Plant from Ameren GenCo. However, the MoPSC
Staff expressed a preference for AmerenUE to own generation facilities rather
than to purchase power at wholesale. The possibility of purchasing generation
facilities from non-affiliated entities was unsuitable because of concerns over
the availability of a reliable transmission path for delivery of power to
AmerenUE customers, because of concerns about transmission constraints, and
because of concerns about the credit worthiness of such non-affiliated entities.
Finally, the cost of purchasing the Pinckneyville Plant and the Kinmundy Plant
from Ameren GenCo at net book value was comparable to or less than the estimated
cost of building new combustion turbine generating units that offer similar
flexibility and operating characteristics.

     The acquisition of the Pinckneyville Plant and the Kinmundy Plant and
associated assets by AmerenUE will not unduly complicate AmerenUE's capital
structure. AmerenUE expects to finance the acquisition of these assets with
internally-generated cash or a combination of cash and debt such that AmerenUE's
capital structure will remain balanced and consistent with its solid financial
condition after giving effect to the acquisition of these assets and related
financing.

     The acquisition of the Pinckneyville Plant and the Kinmundy Plant by
AmerenUE will not have an adverse effect on the interests of consumers of
AmerenUE. As noted above, the Stipulation and Agreement protects existing retail
customers of AmerenUE in Missouri from a change in rates for electric service,
except in limited circumstances, prior to 2006. Because AmerenUE is transferring
its current retail electric service obligations in Illinois to AmerenCIPS, it
will no longer have retail customers in Illinois that might be affected by the
Generation Transfer.

     Finally, the acquisition of the Pinckneyville Plant and the Kinmundy Plant
by AmerenUE will enhance the integration of those facilities with the existing
AmerenUE generating units. As noted above, these units are connected directly to
the Ameren transmission system. However, the Joint Dispatch Agreement requires
AmerenUE and AmerenGenCo each to serve its load requirements from its own
least-cost generation facilities first, before relying on excess generation that
may be available from the other company. By acquiring these generating units,
AmerenUE will be able to dispatch them in the optimal manner to serve the needs
of its retail and wholesale electricity customers without consideration of the
use of those units by Ameren GenCo.


                                       16



     The transactions proposed herein are also subject to Section 12(b) of the
Act and Rule 45 thereunder. Rule 45 permits a subsidiary of a registered holding
company to make extensions of credit without interest in connection with
service, construction or sales contracts (including sales of materials and
supplies); provided that payment is made as soon as reasonably practicable.

     In this case, the extensions of credit relate to the assumption by AmerenUE
of certain obligations of Ameren GenCo that are associated with the
Pinckneyville Plant and the Kinmundy Plant. These obligations include accrued
property taxes, state and federal deferred tax liabilities, and a small account
payable. Payment of these obligations will be made by AmerenUE in the ordinary
course of business without interest.

     C.   Rule 54
          -------

     The transactions proposed herein are also subject to Section 32(h)(4) of
the Act and Rule 54 thereunder. Rule 54 provides that, in determining whether to
approve any transaction that does not relate to an EWG or "foreign utility
company" ("FUCO"), the Commission shall not consider the effect of the
capitalization or earnings of any subsidiary which is an EWG or FUCO upon the
registered holding company system if paragraphs (a), (b) and (c) are satisfied.

     Ameren has complied or will comply with the record-keeping requirements of
Rule 53(a)(2), the limitation under Rule 53(a)(3) on the use of the Ameren
system's domestic public-utility company personnel to render services to EWGs
and FUCOs, and the requirements of Rule 53(a)(4) concerning the submission of
copies of certain filings under the Act to retail regulatory commissions.
Further, none of the circumstances described in Rule 53(b) has occurred or is
continuing. Rule 53(c) is inapplicable by its terms because the proposals
contained herein do not involve the issue and sale of securities (including any
guarantees) to finance an acquisition of an EWG or FUCO.

     Rule 53(a)(1) limits a registered holding company's financing of
investments in EWGs if such holding company's "aggregate investment" in EWGs and
FUCOs exceed 50% of its "consolidated retained earnings." Ameren's "aggregate
investment"(as defined in Rule 53(a)(1)(i)) in all EWGs and FUCOs is
approximately $470,665,404, which is currently equal to 26.5% of Ameren's
"consolidated retained earnings" (as defined in Rule 53(a)(1)(ii)) for the four
quarters ended June 30, 2003 of $1,773,093,901. The sale of the Pinckneyville
Plant and the Kinmundy Plant by Ameren GenCo to AmerenUE and the associated
transactions will have the effect of reducing Ameren's aggregate investment in
EWGs.

ITEM 4.    REGULATORY APPROVALS.
           --------------------

     Applications with respect to transactions contemplated in the Illinois
Asset Transfer Agreement have been or will be filed with the ICC, the MoPSC, and
the FERC. A notice of transfer of certain licenses may also be filed with the
Federal Communications Commission. No other state commission, and no other
federal commission, other than the Commission, has jurisdiction over the
proposed transactions associated with the Illinois Asset Transfer.


                                       17



     An application with respect to transactions contemplated in the Generation
Transfer has been filed with the FERC. Although MoPSC approval is not required
for the Generation Transfer, the MoPSC has stated in filings with the FERC that
this transaction is consistent with and supported by the Stipulation and
Agreement, which was approved by the MoPSC in August 2002. Because the
Generation Transfer will not occur until the Illinois Asset Transfer has been
completed, approval of the ICC will not be required for the Generation Transfer.
No other state commission, and no other federal commission, other than the
Commission, has jurisdiction over the Generation Transfer.

ITEM 5.    PROCEDURE.
           ---------

     The Commission is requested to publish a notice under Rule 23 with respect
to the filing of this Application or Declaration as soon as practicable. It is
respectfully requested that the Commission's Order be issued as soon as the
rules allow, and that there should not be a 30-day waiting period between
issuance of the Commission's order and the date on which the order is to become
effective. AmerenUE and AmerenCIPS hereby waive a recommended decision by a
hearing officer or any other responsible officer of the Commission and consent
that the Division of Investment Management may assist in the preparation of the
Commission's decision and/or order, unless the Division opposes the matters
proposed herein.

ITEM 6.    EXHIBITS AND FINANCIAL STATEMENTS.
           ---------------------------------

      A.   Exhibits.
           --------

           A     None.

           B-1   Form of Illinois Asset Transfer Agreement among Union Electric
                 Company, Central Illinois Public Service Company, and Ameren
                 Corporation.

           B-2   Proposed Listing of Electric Assets and Liabilities and Gas
                 Assets and Liabilities Being Transferred from AmerenUE to
                 AmerenCIPS (to be supplied by amendment).

           B-3   Form of Promissory Note to be issued to AmerenUE by
                 AmerenCIPS.

           B-4   Stipulation and Agreement between the Staff of the MoPSC and
                 AmerenUE dated July 15, 2002 (to be supplied by amendment)

           B-5   Form of Asset Transfer Agreement-Pinckneyville Generating
                 Station. (to be supplied by amendment)

           B-6   Form of Asset Transfer Agreement-Kinmundy Generating Station
                 (to be supplied by amendment).


                                       18



           C     None.

           D-1   Notice to Illinois Commerce Commission of transfer of Electric
                 Distribution and Transmission Assets and Retail Electric
                 Business (to be filed by amendment).

           D-2   Petition to Illinois Commerce Commission for authorization to
                 transfer certificates of public convenience and necessity
                 issued to AmerenUE to provide retail electric service in
                 Illinois (to be filed by amendment).

           D-3   Petition to Illinois Commerce Commission for authorization to
                 transfer gas system assets and gas public utility business (to
                 be filed by amendment).

           D-4   Order of Illinois Commerce Commission relating to transfer of
                 Electric Distribution and Transmission Assets and Retail
                 Electric Business (to be filed by amendment).

           D-5   Order of Illinois Commerce Commission relating to transfer of
                 certificates of public convenience and necessity issued to
                 AmerenUE to provide retail electric service in Illinois (to be
                 filed by amendment).

           D-6   Order of Illinois Commerce Commission relating to transfer of
                 gas system assets and gas public utility business (to be filed
                 by amendment).

           D-7   Application to Missouri Public Service Commission for
                 authorization to transfer assets and related contracts, dated
                 August 25, 2003.

           D-8   Order of Missouri Public Service Commission (to be filed by
                 amendment)

           D-9   Application to FERC pursuant to Section 203 of Federal Power
                 Act to transfer FERC-jurisdictional assets associated with
                 Illinois Asset Transfer (to be filed by amendment).

           D-10  Order of FERC authorizing the Illinois Asset Transfer (to be
                 filed by amendment).

           D-11  Application to FERC pursuant to Section 203 of the Federal
                 Power Act to transfer FERC-jurisdictional assets associated
                 with the Generation Transfer, dated February 5, 2003 (to be
                 filed by amendment).

           D-12  Order of FERC authorizing the Generation Transfer (to be filed
                 by amendment).

           D-13  Report and Order of the MoPSC approving the Stipulation and
                 Agreement identified in Exhibit B-5, dated July 30, 2002 (to
                 be filed by amendment)


                                       19



           E     Map of combined service areas of AmerenUE and AmerenCIPS
                 (Paper format - Form SE) (to be filed by amendment).

           F     Opinion of Counsel (to be filed by amendment).

           G     Proposed Form of Federal Register Notice.


      B.   Financial Statements.
           --------------------

           FS-1  Balance Sheet of Ameren and consolidated subsidiaries, as of
                 June 30, 2003 (incorporated by reference to the Quarterly
                 Report on Form 10-Q of Ameren for the quarter ended June 30,
                 2003) (File No. 001-14756).

           FS-2  Statement of Income of Ameren and consolidated subsidiaries
                 for the three and six-month periods ended June 30, 2003
                 (incorporated by reference to the Quarterly Report on Form
                 10-Q of Ameren for the quarter ended June 30, 2003) (File No.
                 001-14756).

           FS-3  Balance Sheet of AmerenUE and consolidated subsidiaries as of
                 June 30, 2003 (incorporated by reference to the Quarterly
                 Report on Form 10-Q of AmerenUE for the quarter ended June 30,
                 2003) (File No. 001-02967).

           FS-4  Statement of Income of AmerenUE and consolidated subsidiaries
                 for the three and six-month periods ended June 30, 2003
                 (incorporated by reference to the Quarterly Report on Form
                 10-Q of AmerenUE for the quarter ended June 30, 2003) (File
                 No. 001-02967).

           FS-5  Balance Sheet of AmerenCIPS as of June 30, 2003 (incorporated
                 by reference to the Quarterly Report on Form 10-Q of
                 AmerenCIPS for the quarter ended June 30, 2003) (File No.
                 001-03672).

           FS-6  Statement of Income of AmerenCIPS for the three and six-month
                 periods ended June 30, 2003 (incorporated by reference to the
                 Quarterly Report on Form 10-Q of AmerenCIPS for the quarter
                 ended June 30, 2003) (File No. 001-03672).

           FS-7  Pro Forma Balance Sheet of AmerenUE (to be filed by
                 amendment).

           FS-8  Pro Forma Balance Sheet of AmerenCIPS (to be filed by
                 amendment).

           FS-9  Preliminary Accounting Entries for Transfer of Electric Assets
                 and Liabilities from AmerenUE to AmerenCIPS estimated at
                 December 31, 2003 (see Exhibit B-2).


                                       20



           FS-10 Preliminary Accounting Entries for Transfer of Pinckneyville
                 Plant and Kinmundy Plant estimated at April 30, 2003 (to be
                 filed by amendment)

ITEM 7.    INFORMATION AS TO ENVIRONMENTAL EFFECTS.
           ---------------------------------------

     None of the matters that are the subject of this Application or Declaration
involve a "major federal action" nor do they "significantly affect the quality
of the human environment" as those terms are used in section 102(2)(C) of the
National Environmental Policy Act. The transactions that are the subject of this
Application or Declaration will not result in changes in the operation of
AmerenUE or AmerenCIPS that will have an impact on the environment. AmerenUE and
AmerenCIPS are not aware of any federal agency that has prepared or is preparing
an environmental impact statement with respect to the transactions that are the
subject of this Application or Declaration.

                                   SIGNATURES

     Pursuant to the requirements of the Public Utility Holding Company Act of
1935, as amended, the undersigned companies have duly caused this Application or
Declaration filed herein to be signed on their behalf by the undersigned
thereunto duly authorized.


                                         AMEREN CORPORATION
                                         CENTRAL ILLINOIS PUBLIC SERVICE COMPANY
                                         UNION ELECTRIC COMPANY


                                         By: /s/ Steven R. Sullivan
                                                 ------------------
                                         Name:   Steven R. Sullivan
                                         Title:  Senior Vice President
                                                 Governmental/Regulatory Policy,
                                                 General Counsel and Secretary

Date: October 16, 2003


                                       21