(As filed with the Securities and Exchange Commission on February 24, 2004)

                                                             File No. 70-[_____]

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM U-1

                           APPLICATION OR DECLARATION
                                    UNDER THE
                   PUBLIC UTILITY HOLDING COMPANY ACT OF 1935

                               AMEREN CORPORATION
                             UNION ELECTRIC COMPANY
                              1901 Chouteau Avenue
                            St. Louis, Missouri 63103

                     CENTRAL ILLINOIS PUBLIC SERVICE COMPANY
                              607 East Adams Street
                           Springfield, Illinois 62739

                     (Name of company 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 & Secretary
                             Ameren Services Company
                              1901 Chouteau Avenue
                            St. Louis, Missouri 63103

                     (Name and address of agent for service)

              -----------------------------------------------------





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

Ronald K. Evans,                             William T. Baker, Jr., Esq.
Managing Associate General Counsel           Thelen Reid & Priest LLP
Ameren Services Company                      875 Third Avenue
1901 Chouteau Avenue                         New York, New York  10022
St. Louis, Missouri 63103





                                TABLE OF CONTENTS

                                                                            PAGE

ITEM 1. DESCRIPTION OF PROPOSED TRANSACTION....................................2

     1.1   INTRODUCTION........................................................2
     1.2   CAPITALIZATION OF AMEREN............................................4
     1.3   AMEREN'S CURRENT FINANCING AUTHORIZATION............................5
     1.4   SUMMARY OF REQUESTED APPROVALS......................................5
     1.5   PARAMETERS APPLICABLE TO AUTHORIZED EXTERNAL FINANCING
             TRANSACTIONS......................................................7
     1.6   USE OF PROCEEDS.....................................................8
     1.7   DESCRIPTION OF SPECIFIC FINANCING PROPOSALS.........................8
         1.7.1  COMMON STOCK...................................................9
         1.7.2  PREFERRED STOCK, PREFERRED SECURITIES, EQUITY-LINKED
                  SECURITIES AND LONG-TERM DEBT................................9
         1.7.3  SHORT-TERM DEBT...............................................10
     1.8   COMMON STOCK ISSUED UNDER STOCK-BASED PLANS........................11
     1.9   GUARANTEES.........................................................13
     1.10  HEDGING TRANSACTIONS...............................................13
         1.10.1 INTEREST RATE HEDGES..........................................13
         1.10.2 ANTICIPATORY HEDGES...........................................14
     1.11  FINANCING SUBSIDIARIES.............................................15
     1.12  CERTIFICATES OF NOTIFICATION.......................................15

ITEM 2. FEES, COMMISSIONS AND EXPENSES........................................16

ITEM 3. APPLICABLE STATUTORY PROVISIONS.......................................16

     3.1   GENERAL............................................................16
     3.2   COMPLIANCE WITH RULES 53 AND 54....................................17

ITEM 4. REGULATORY APPROVAL...................................................17

ITEM 5. PROCEDURE.............................................................18

ITEM 6. EXHIBITS AND FINANCIAL STATEMENTS.....................................18

      A.   Exhibits...........................................................18
      B.   Financial Statements...............................................19

ITEM 7. INFORMATION AS TO ENVIRONMENTAL EFFECTS...............................19





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"). Ameren directly or indirectly owns all of the issued and
outstanding common stock of Union Electric Company d/b/a AmerenUE ("AmerenUE"),
Central Illinois Public Service Company d/b/a AmerenCIPS ("AmerenCIPS"), and
Central Illinois Light Company d/b/a ("AmerenCILCO"). Together, AmerenUE,
AmerenCIPS and AmerenCILCO provide retail and wholesale electric service to
approximately 1.7 million customers and retail natural gas service to
approximately 500,000 customers in a 49,000 square-mile area of Missouri and
Illinois, including the St. Louis, Missouri and Peoria and Springfield, Illinois
metropolitan areas.

     In addition to the foregoing, AmerenCILCO owns all of the issued and
outstanding common stock of AmerenEnergy Resources Generating Company (f/k/a
Central Illinois Generation, Inc.) ("AERG"), a generating subsidiary company.
AERG was formed by AmerenCILCO in November 2001 in order to facilitate the
restructuring of AmerenCILCO in accordance with the Illinois Electric Service
Customer Choice and Rate Relief Law of 1997. In October 2003, AmerenCILCO
transferred substantially all of its generating assets representing in the
aggregate approximately 1,100 megawatts (MW) of electric generating capacity to
AERG.

     On February 2, 2004, Ameren entered into a definitive stock purchase
agreement to acquire all of the issued and outstanding common stock and other
securities of Illinois Power Company ("Illinois Power") from Illinova
Corporation, an exempt holding company and a subsidiary of Dynegy Inc. Ameren
intends to file an application/declaration to seek Commission approval for that
acquisition and other related transactions.

     Ameren has five direct wholly-owned non-utility subsidiaries (in addition
to CILCORP Inc. ("CILCORP"), which in turn owns all of the issued and
outstanding common stock of AmerenCILCO), as follows:

     o    Ameren Services Company, a service company subsidiary, which provides
          administrative, management and technical services to Ameren and its
          associate companies in the Ameren system;

     o    Ameren Development Company ("Ameren Development"), an intermediate
          non-utility holding company, which directly owns all of the
          outstanding common stock of Ameren ERC, Inc. ("Ameren ERC"), an
          "energy-related company" under Rule 58 that provides energy management
          services. Ameren ERC in turn owns all of the outstanding common stock
          of Missouri Central Railroad Company, a fuel transportation
          subsidiary, and an 89.1% interest in Gateway Energy Systems, L.C.,
          which in turn owns Gateway Energy WGK Project, L.L.C., which together
          are developing thermal energy projects. These entities are also
          "energy-related companies" under Rule 58. Ameren Development also
          directly owns all of the outstanding common stock of Ameren Energy
          Communications, Inc., an "exempt telecommunications company" under
          Section 34 of the Act;


                                       2



     o    Ameren Energy Resources Company, an intermediate non-utility holding
          company, which directly holds all of the outstanding voting securities
          of the following subsidiaries: (1) Ameren Energy Development Company,
          an "exempt wholesale generator" ("EWG") under Section 32 of the Act,
          which, in turn, owns all of the outstanding common stock of Ameren
          Energy Generating Company ("Ameren GenCo"), also an EWG; (2) Ameren
          Energy Marketing Company, an "energy-related company" under Rule 58;
          (3) Ameren Energy Fuels and Services Company, also an "energy-related
          company" under Rule 58, which directly and through AFS Development
          Company, L.L.C., a wholly-owned subsidiary, and Cowboy Railroad
          Development Co., a 71%-owned subsidiary, makes investments in and
          engages in operating activities related to fuel procurement, handling,
          transportation and storage facilities and provides related fuel
          management services to associate and nonassociate companies; (4)
          Illinois Materials Supply Co., which was established to serve as an
          "enterprise zone" company in connection with purchasing goods,
          material and equipment for Ameren Energy Development Company and other
          non-utility associate companies; and (5) AmerenEnergy Medina Valley
          Cogen (No. 4), L.L.C., an intermediate non-utility holding company
          that indirectly through AmerenEnergy Medina Valley Cogen (No. 2),
          L.L.C., holds all of the membership interests in AmerenEnergy Medina
          Valley Cogen, L.L.C., an EWG, and directly holds all of the membership
          interests in AmerenEnergy Medina Valley Operations, L.L.C. Ameren
          Energy Resources Company also directly holds 20% of the outstanding
          common stock of Electric Energy, Inc. ("EEI"), an EWG that owns and
          operates a 1,086 MW coal-fired electric generating station and
          associated transmission facilities located in Joppa, Illinois.

     o    Ameren Energy, Inc., an "energy-related company" under Rule 58 that
          primarily serves as the short-term energy trading and marketing agent
          for AmerenUE and Ameren GenCo and provides a range of energy and risk
          management services; and

     o    CIPSCO Investment Company, which holds various nonregulated and
          passive investments, including passive investments in affordable
          housing projects that qualify for federal tax credits and investments
          in equipment leases.

     AmerenUE has one direct wholly-owned non-utility subsidiary, Union Electric
Development Corporation, which holds investments in affordable housing projects
that qualify for federal income tax credits and other passive investments.
AmerenUE also directly holds 40% of the outstanding common stock of EEI.

     CILCORP directly owns all of the common stock of three non-utility
subsidiaries, as follows:

     o    CILCORP Investment Management Inc., which, through subsidiaries,
          manages CILCORP's investments in equipment leases, affordable housing
          projects that qualify for federal income tax credits, non-regulated
          independent power projects, and other passive investments;


                                       3



     o    CILCORP Ventures Inc., which, through a wholly-owned subsidiary,
          CILCORP Energy Services, Inc., provides energy-related products and
          services, including gas management services for gas management
          customers; and

     o    QST Enterprises Inc., which, through subsidiaries, provides energy and
          related services in non-regulated retail and wholesale markets,
          including utility operations and maintenance services (primarily to
          one of AmerenCILCO's largest industrial customers), and holds
          interests in environmentally distressed parcels of real estate
          acquired for resale.

     AmerenCILCO directly owns all of the issued and outstanding common stock of
two non-utility subsidiaries, neither of which conducts any significant business
at this time:

     o    CILCO Exploration and Development Company, which previously engaged in
          the exploration and development of gas, oil, coal and other mineral
          resources; and

     o    CILCO Energy Corporation, which was formed to research and develop new
          sources of energy, including the conversion of coal and other minerals
          into gas.

     For purposes of this Application/Declaration, AmerenUE, AmerenCIPS,
AmerenCILCO, and AERG are referred to collectively as the "Utility
Subsidiaries." The non-utility subsidiaries (other than CILCORP) identified
above are herein referred to collectively as the "Non-Utility Subsidiaries." The
Utility Subsidiaries and Non-Utility Subsidiaries are referred to herein
collectively as the "Subsidiaries." The term Subsidiaries is also intended to
include any other subsidiaries hereafter acquired, directly or indirectly, by
Ameren in a transaction that is exempt under the Act or rules thereunder or that
has been approved by the Commission in a separate proceeding. Ameren, AmerenUE
and AmerenCIPS are sometimes referred to as the "Applicants."

     An organizational chart showing the relationship of Ameren and its
Subsidiaries is filed herewith as Exhibit E-1.

     For the twelve months ended December 31, 2003, Ameren reported total
operating revenues of $4,593,000,000, operating income of $1,090,000,000, and
net income of $524,000,000. On a consolidated basis, approximately 85.7% of
Ameren's 2003 operating revenues were derived from sales of electricity
(inclusive of sales by Ameren GenCo), 14.1% from sales of gas and gas
transportation service, and 0.2% from other sources. At December 31, 2003,
Ameren had $14,233,000,000 in total assets, including net property and plant of
$10,917,000,000.

     1.2 Capitalization of Ameren. Under its Restated Articles of Incorporation,
as amended (Exhibits A-1 and A-2 hereto), Ameren is authorized to issue
500,000,000 shares of capital stock consisting of 400,000,000 shares of common
stock, $.01 par value ("Common Stock"), and 100,000,000 shares of preferred
stock $.01 par value ("Preferred Stock"), which may be issued in one or more
series with such designations as are approved by Ameren's board of directors. At
December 31, 2003, Ameren had issued and outstanding 162,861,662 shares of
Common Stock. Ameren does not have any outstanding Preferred Stock, but has
reserved 4,000,000 shares for issuance upon exercise of rights issued under its
shareholder rights plan. In addition, at December 31, 2003, Ameren had issued


                                       4



and outstanding $445 million principal amount of senior unsecured debt
securities having maturities through 2007. At December 31, 2003, Ameren did not
have any outstanding short-term debt. Ameren's common stock is listed and traded
on the New York Stock Exchange.

     As of December 31, 2003, Ameren's capitalization on a consolidated basis
was as follows:



                                                    
          -------------------------------------------------------
          Common equity           $ 4,354,000,000           46.9%
          -------------------------------------------------------
          Preferred equity        $   182,000,000            2.0%
          -------------------------------------------------------
          Long-term debt*         $ 4,091,000,000           44.0%
          -------------------------------------------------------
          Short-term debt**       $   659,000,000            7.1%
          -------------------------------------------------------
                      Total       $ 9,286,000,000         100.00%
          -------------------------------------------------------

               *  Includes mandatorily redeemable preferred stock
               ** Includes current portion of long-term debt



     Ameren's senior unsecured debt securities are currently rated BBB+ by
Standard & Poor's Inc. ("S&P") and A3 by Moody's Investors Service ("Moody's").
Ameren's commercial paper is rated A-2 by S&P and P-2 by Moody's.

     1.3 Ameren's Current Financing Authorization. By order dated October 5,
2001 in File No. 70-9877,/1/ (the "Current Financing Order"), Ameren is
authorized to issue and sell from time to time through September 30, 2004 (i) in
public or private offerings, up to $2.5 billion at any time outstanding of
Common Stock or options, warrants or other stock purchase rights exercisable for
Common Stock, Preferred Stock and other forms of preferred securities
(including, without limitation, trust preferred securities) ("Preferred
Securities"), equity-linked securities ("Equity-linked Securities"), and
unsecured long-term debt securities ("Long-term Debt"),/2/ (ii) in addition to
the foregoing, up to 25 million shares of Common Stock through stock-based plans
maintained for shareholders (including new investors), officers, employees, and
non-employee directors, and (iii) up to $1.5 billion principal amount at any
time outstanding of commercial paper and/or other forms of unsecured short-term
indebtedness ("Short-term Debt"). In addition, Ameren is authorized to provide
guarantees and other forms of credit support ("Guarantees") on behalf of its
Non-utility Subsidiaries in an aggregate amount at any one time outstanding not
to exceed $1.5 billion, and to enter into interest rate hedging transactions
with respect to outstanding indebtedness and anticipated debt offerings.

     1.4 Summary of Requested Approvals. Ameren proposes herein to amend and
restate its current financing authorization, as contained in the Current
Financing Order, for the period commencing with the effective date of the
Commission's order in this proceeding and ending June 30, 2007 (the
"Authorization Period"). Upon the effective date of the Commission's order in
this proceeding, Ameren will relinquish its authority to issue securities and
engage in the other transactions authorized under the Current Financing Order.

----------
1    See Ameren Corporation, Holding Co. Act Release No. 27449 (Oct. 5, 2001).

2    Ameren is authorized to issue and sell Common Stock and Preferred Stock
     directly and Equity-linked Securities, Preferred Securities and Long-term
     Debt directly or indirectly through one or more financing subsidiaries.


                                       5



     Specifically, Ameren requests authorization for the following transactions
during the Authorization Period:

          (i)  Ameren requests authority to issue and sell from time to time,
               directly, Common Stock and Preferred Stock,/3/ and directly or
               indirectly through one or more financing subsidiaries ("Financing
               Subsidiaries"), Preferred Securities (including without
               limitation trust preferred securities), Equity-linked Securities
               and/or Long-term Debt in an aggregate amount at any time
               outstanding not to exceed $2.5 billion.

         (ii)  Ameren requests authority to issue up to 25 million shares of
               Common Stock pursuant to its dividend reinvestment and stock
               purchase plan and employee savings and incentive compensation
               plans maintained for its officers and employees, or other similar
               stock-based plans adopted in the future, such shares to be in
               addition to any shares of Common Stock issued under the authority
               requested in (i) above.

        (iii)  Ameren requests authority to issue and sell from time to time
               Short-term Debt in an aggregate principal amount at any time
               outstanding not to exceed $1.5 billion.

         (iv)  Ameren requests authority to provide Guarantees on behalf or for
               the benefit of its Subsidiaries in an aggregate principal or
               nominal amount not to exceed $1.5 billion at any one time
               outstanding, provided that the amount of any securities issued by
               a Financing Subsidiary of Ameren that are guaranteed or supported
               by other forms of credit enhancement provided by Ameren will not
               count against this limitation but will instead be counted against
               the limitation on long-term securities proposed in (i) above.

          (v)  Ameren, directly or indirectly through any Financing Subsidiary,
               requests authority to enter into hedging transactions ("Interest
               Rate Hedges") with respect to existing indebtedness in order to
               manage and minimize interest rate costs, and to enter into
               hedging transactions ("Anticipatory Hedges") with respect to

----------
3    Any shares of Preferred Stock issued under the authorization requested in
     this proceeding would be in addition to any Preferred Stock that may be
     issued under Ameren's shareholder rights plan, as authorized by the
     Commission in File No. 70-9383. See Ameren Corporation, Holding Co. Act
     Release No. 26961 (Dec. 29, 1998).


                                       6



               anticipatory debt issuances in order to lock-in current interest
               rates and/or manage interest rate risk exposure.

     In addition to the foregoing requests by Ameren, AmerenUE and AmerenCIPS
are requesting in this Application/Declaration authorization to acquire the
equity securities of one or more Financing Subsidiaries to facilitate the
issuance of long-term debt and/or preferred securities (including, without
limitation, trust preferred securities).

     1.5 Parameters Applicable to Authorized External Financing Transactions.
The following general terms will be applicable where appropriate to the proposed
external financing activities requested to be authorized hereby (including,
without limitation, securities issued for the purpose of refinancing or
refunding outstanding securities of the issuer):/4/

     Effective Cost of Money. The effective cost of capital on Long-term Debt,
Preferred Stock, Preferred Securities, Equity-linked Securities, and Short-term
Debt will not exceed competitive market rates available at the time of issuance
for securities having the same or reasonably similar terms and conditions issued
by similar companies of reasonably comparable credit quality; provided that in
no event will the effective cost of capital (i) on any series of Long-term Debt
exceed 500 basis points over a U.S. Treasury security having a remaining term
equal to the term of such series, (ii) on any series of Preferred Stock,
Preferred Securities or Equity-linked Securities exceed 700 basis points over a
U.S. Treasury security having a remaining term equal to the term of such series,
and (iii) on Short-term Debt exceed 300 basis points over the London Interbank
Offered Rate ("LIBOR") for maturities of less than one year.

     Maturity. The maturity of Long-term Debt will be between one and 50 years
after the issuance thereof. Preferred Securities and Equity-linked Securities
will be redeemed no later than 50 years after the issuance thereof, unless
converted into Common Stock. Preferred Stock issued directly by Ameren may be
perpetual in duration.

     Issuance Expenses. The underwriting fees, commissions or other similar
remuneration paid in connection with the non-competitive issue, sale or
distribution of securities pursuant to this Application/Declaration will not
exceed the greater of (i) 6% of the principal or total amount of the securities
being issued or (ii) issuance expenses that are generally paid at the time of
the pricing for sales of the particular issuance, having the same or reasonably
similar terms and conditions issued by similar companies of reasonably
comparable credit quality.

     Common Equity Ratio. At all times during the Authorization Period, Ameren
and each Utility Subsidiary will maintain common equity of at least 30% of its
consolidated capitalization (common equity, preferred stock, long-term debt and
short-term debt); provided that Ameren will in any event be authorized to issue
Common Stock (including pursuant to stock-based plans maintained for
shareholders, including new investors, officers, employees and non-employee
directors) to the extent authorized herein.

----------
4    The Commission has previously authorized financing transactions subject to
     these same general parameters. See SCANA Corporation, Holding Co. Act
     Release No. 27649 (Feb. 12, 2003).


                                       7



     Investment Grade Ratings. Ameren further represents that, except for
securities issued to fund intrasystem financings, no guarantees or other
securities, other than Common Stock, may be issued in reliance upon the
authorization granted by the Commission pursuant to this
Application/Declaration, unless (i) the security to be issued, if rated, is
rated investment grade; and (ii) all outstanding securities of Ameren that are
rated are rated investment grade. For purposes of this provision, a security
will be deemed to be rated "investment grade" if it is rated investment grade by
at least one nationally recognized statistical rating organization, as that term
is used in paragraphs (c)(2)(vi)(E), (F) and (H) of Rule 15c3-1 under the
Securities Exchange Act of 1934, as amended ("1934 Act"). The ratings test will
not apply to any issuance of Common Stock. Ameren requests that the Commission
reserve jurisdiction over the issuance of any such securities that are rated
below investment grade. Ameren further requests that the Commission reserve
jurisdiction over the issuance of any guarantee or other securities at any time
that the conditions set forth in clauses (i) and (ii) above are not satisfied.

     Authorization Period. No security will be issued pursuant to the
authorization sought herein after the last day of the Authorization Period (June
30, 2007).

     1.6 Use of Proceeds. Ameren will utilize the proceeds of financing
authorized hereunder for general and corporate purposes including: (a)
financing, in part, of the capital expenditures of Ameren and its Subsidiaries;
(b) financing working capital requirements and capital spending of the
Subsidiaries, including by making contributions to the Ameren System Utility
Money Pool and Ameren System Non-State Regulated Subsidiary Money Pool;/5/ (c)
financing exempt acquisitions of interests in EWGs and "foreign utility
companies" ("FUCOs"), subject to the limitations of Rule 53; (d) financing
exempt acquisitions of interests in "energy-related companies," as defined in
Rule 58, subject to the limitations of that rule; (e) the acquisition,
retirement, refinancing or redemption of securities of which Ameren is the
issuer pursuant to Rule 42; and/or (f) the acquisition of the securities or
assets of other companies, as may be authorized by the Commission in a separate
proceeding.

     1.7 Description of Specific Financing Proposals. Ameren contemplates that
Common Stock (including options, warrants and/or forward equity purchase
contracts), Preferred Stock, Preferred Securities, Equity-linked Securities and
Long-term Debt would be issued directly to one or more purchasers in
privately-negotiated transactions or to one or more investment banking or
underwriting firms or other entities who would resell such securities without
registration under the Securities Act of 1933 ("1933 Act") in reliance upon one
or more applicable exemptions from registration thereunder, or to the public
either (i) through underwriters selected by negotiation or competitive bidding
or (ii) through selling agents acting either as agent or as principal for resale
to the public either directly or through dealers. All such securities sales will
be at rates or prices and under conditions negotiated or based upon, or
otherwise determined by, competitive capital markets.

----------
5    The Commission has previously authorized Ameren to maintain and make
     advances to the Utility Subsidiaries and certain of the Non-Utility
     Subsidiaries through separate system money pool arrangements. See Ameren
     Corporation, et al., Holding Co. Act Release Nos. 27655 (Feb. 27, 2003),
     27721 (Sept. 15, 2003), and 27738 (Oct. 20, 2003) in File No. 70-10106.


                                       8



     Ameren has filed a Registration Statement on Form S-3 (Exhibit C-1 hereto)
under the 1933 Act utilizing the "shelf" registration process, under which
Ameren may offer for sale, in one or more transactions, (i) directly, any
combination of Common Stock, stock purchase contracts, stock purchase units, and
senior long-term debt securities and subordinated long-term debt securities,
each of which may be converted into Common Stock, and (ii) indirectly through
one or more Financing Subsidiaries,/6/ trust preferred securities, and
guarantees thereof by Ameren, in an aggregate amount up to $1,472,875,000, of
which amount $1,469,262,508 has been utilized./7/ The prospectus contained in
the Registration Statement provides a general description of the securities
Ameren may offer. Information about the terms of any specific securities to be
offered under this "shelf" registration process will be as set forth in one or
more prospectus supplements to be filed at the time of any specific offering.

          1.7.1 Common Stock. Ameren may issue and sell Common Stock through
underwriters or dealers, through agents, or directly to a limited number of
purchasers or a single purchaser. If underwriters are used in the sale of Common
Stock, such securities will be acquired by the underwriters for their own
account and may be resold from time to time in one or more transactions,
including negotiated transactions, at a fixed public offering price or at
varying prices determined at the time of sale. Common Stock may be offered to
the public either through underwriting syndicates (which may be represented by a
managing underwriter or underwriters designated by Ameren) or directly by one or
more underwriters acting alone. Common Stock may be sold directly by Ameren or
through agents designated by Ameren from time to time. If dealers are utilized
in the sale of Common Stock, Ameren will sell such securities to the dealers, as
principals. Any dealer may then resell such Common Stock to the public at
varying prices to be determined by such dealer at the time of resale. If Common
Stock is being sold in an underwritten offering, Ameren may grant the
underwriters thereof a "green shoe" option permitting the purchase from Ameren
at the same price of additional shares.

     Ameren may also issue Common Stock or options, warrants or other stock
purchase rights exercisable for Common Stock in public or privately-negotiated
transactions as consideration for the equity securities or assets of other
companies, provided that the acquisition of any such equity securities or assets
has been authorized in a separate proceeding or is exempt under the Act or the
rules thereunder (specifically Rule 58).

          1.7.2 Preferred Stock, Preferred Securities, Equity-linked Securities
and Long-term Debt. Ameren proposes to issue Preferred Stock or, directly or
indirectly through one or more Financing Subsidiaries,/8/ Long-Term Debt,
Preferred Securities (including, specifically, trust preferred securities), and

----------
6    Ameren has formed, but has not yet utilized, two Financing Subsidiaries,
     Ameren Capital Trust I and Ameren Capital Trust II, to facilitate the
     issuance of trust preferred securities.

7    Ameren intends to file one or more new "shelf" Registration Statements
     during the Authorization Period with respect to some or all of these types
     of securities.

8    Ameren has previously been authorized to acquire the securities of one or
     more Financing Subsidiaries and to engage in related transactions involving
     Financing Subsidiaries. See Ameren Corporation, et al., Holding Co. Act
     Release No. 27777 (Dec. 18, 2003). All transactions involving the issuance
     of securities by a Financing Subsidiary of Ameren will comply with the
     terms and conditions of the December 18, 2003 order as well as the order
     issued in this proceeding.


                                       9



Equity-linked Securities (including, specifically, debt or preferred securities
that are convertible, either mandatorily or at the option of the holder, into
Common Stock and forward purchase contracts for Common Stock)./9/

     Preferred Stock, Preferred Securities and Equity-linked Securities may be
issued in one or more series with such rights, preferences, and priorities as
may be designated in the instrument creating each such series. All such
securities will be redeemed no later than 50 years after the issuance thereof,
unless converted into Common Stock, except that Preferred Stock may be perpetual
in duration. Dividends or distributions on Preferred Stock, Preferred Securities
or Equity-linked Securities will be made periodically and to the extent funds
are legally available for such purpose, but may be made subject to terms that
allow the issuer to defer dividend payments or distributions for specified
periods. Preferred Securities and Equity-linked Securities may be convertible or
exchangeable into shares of Common Stock and may be issued in the form of shares
or units.

     Long-term Debt of a particular series (a) will be unsecured, (b) will have
a maturity ranging from one to 50 years, (c) may be subject to optional and/or
mandatory redemption, in whole or in part, at par or at various premiums above
the principal amount thereof, (d) may be entitled to mandatory or optional
sinking fund provisions, (e) may provide for reset of the coupon pursuant to a
remarketing or auction arrangement, and (f) may be called from existing
investors by a third party. The maturity dates, interest rates, and redemption
and sinking fund provisions, if any, with respect to the Long-term Debt of a
particular series, as well as any associated placement, underwriting or selling
agent fees, commissions and discounts, if any, will be established by
negotiation or competitive bidding.

          1.7.3 Short-term Debt. Ameren proposes to issue and sell from time to
time Short-term Debt in an aggregate principal amount at any time outstanding
not to exceed $1.5 billion. Short-term Debt may include commercial paper notes,
bank notes, and other forms of short-term indebtedness. All Short-term Debt will
be unsecured and will have maturities of less than one year from the date of
issuance.

     Commercial paper will be sold in established domestic or European
commercial paper markets. Such commercial paper would typically be sold to
dealers at the discount rate per annum prevailing at the date of issuance for
commercial paper of comparable quality and maturities sold to commercial paper
dealers generally. It is expected that the dealers acquiring such commercial
paper will reoffer it at a discount to corporate, institutional and, with
respect to European commercial paper, individual investors. It is anticipated
that such commercial paper will be reoffered to investors such as commercial

----------
9    In accordance with the Current Financing Order, Ameren in March 2002 issued
     $345 million of adjustable conversion-rate equity security units. The $25
     adjustable conversion-rate equity security units each consisted of a senior
     unsecured note with a principal amount of $25 and a contract to purchase,
     for $25, a fraction of a share of Common Stock on May 15, 2005. The senior
     unsecured notes will mature on May 15, 2007. The stock purchase contracts
     require holders to purchase between 8.7 million and 7.4 million shares of
     Common Stock on May 15, 2005 at the market price at that time, subject to a
     minimum share purchase price of $39.50 and a maximum of $46.61.


                                       10



banks, insurance companies, pension funds, investment trusts, foundations,
colleges and universities, finance companies and nonfinancial corporations.

     Ameren also proposes to establish and maintain back-up credit lines with
banks or other institutional lenders to support its commercial paper program(s)
and other credit arrangements and/or borrowing facilities generally available to
borrowers with comparable credit ratings as it may deem appropriate in light of
its needs and existing market conditions providing for revolving credit or other
loans and having commitment periods not longer than the Authorization Period.
Only the amounts drawn and outstanding under these agreements and facilities
will be counted against the proposed limit on Short-term Debt./10/

     1.8 Common Stock Issued Under Stock-based Plans. In addition to the
foregoing, Ameren also proposes to issue up to 25 million shares of Common Stock
under stock-based plans that it or any of its subsidiaries maintain for
shareholders, investors, employees and nonemployee directors (collectively,
"Plans"). Currently, Ameren maintains the following Plans:

o    Dividend Reinvestment Plan. Ameren's dividend reinvestment and stock
     purchase plan ("DRPlus") is intended to provide participants with a
     convenient way to purchase Common Stock and to reinvest all or a portion of
     the dividends received on Common Stock or on preferred stock of AmerenUE,
     AmerenCIPS, AmerenCILCO or any other Ameren subsidiary in additional shares
     of Common Stock. In addition, participants in the DRPlus may make optional
     cash purchases of Common Stock in a minimum amount of $25 per transaction
     after the initial investment and up to a maximum of $120,000 per year.
     Eligible non-shareholders may enroll in the DRPlus by making an initial
     minimum cash investment of $250. Eligible non-shareholders who are
     employees of Ameren or its subsidiaries may authorize a minimum payroll
     deduction investment of $25 per pay period to purchase Common Stock. If
     shares of Common Stock for issuance under the DRPlus are purchased on the
     open market or in privately negotiated transactions, the price of such
     shares shall be the weighted average price at which an independent agent
     acquired such shares on the applicable investment date plus applicable
     brokerage commissions and other fees. If Ameren chooses to issue new shares
     of Common Stock, the price on the applicable investment date will be the
     average of the high and low sales prices for Ameren's Common Stock reported
     on the consolidated tape for NYSE-listed companies administered by the
     Consolidated Tape Association. Ameren has filed a Registration Statement on
     Form S-3 (incorporated by reference as Exhibit C-3 hereto), which has not
     yet been declared effective, to register 6,000,000 shares of Common Stock
     for issuance under the DRPlus./11/ A full description of the DRPlus is
     included in the pending Registration Statement.

o    Ameren Long-term Incentive Plan. In 1998, Ameren adopted a long-term
     incentive plan ("1998 Incentive Plan") for eligible employees, replacing
     the plan previously in place at AmerenUE. The 1998 Incentive Plan provides

----------
10   Ameren currently has in place committed revolving credit facilities
     totaling $600 million which are used, in part, to support its commercial
     paper program.

11   When it is declared effective, the new Registration Statement for shares to
     be issued under the DRPlus will replace Ameren's current Registration
     Statement on Form S-3, as filed on June 15, 2000 (incorporated by reference
     as Exhibit C-2 hereto).


                                       11



     for the grant of options, performance awards, restricted stock, dividend
     equivalents and stock appreciation rights. Under the terms of the plan,
     options may be granted at a price not less than the fair market value of
     Ameren's Common Stock at the date of the grant. Granted options vest over a
     period of five years, beginning at the date of the grant, and provide for
     acceleration of exercisability of the options upon the occurrence of
     certain events, including retirement. Outstanding options expire on various
     dates through 2010. Since 2001, awards under the 1998 Incentive Plan have
     been exclusively in the form of restricted Common Stock. Restricted shares
     have the potential to vest equally over a seven-year period from the date
     of grant (one seventh on each anniversary date) based upon achievement of
     certain Ameren performance levels and upon the achievement of required
     stock ownership levels based on position and salary. The vesting period is
     reduced from seven years to three years if Ameren's ongoing earnings per
     share achieve a prescribed growth rate over the three-year period. Ameren
     has registered 4,000,000 shares of Common Stock for issuance or delivery
     under the 1998 Incentive Plan. See Registration Statement on Form S-8,
     which is incorporated by reference as Exhibit C-4 hereto. The 1998
     Incentive Plan is incorporated by reference as Exhibit H hereto.

o    Ameren Corporation Savings Investment Plan (formerly the Union Electric
     Savings Investment Plan). Ameren maintains an employee savings investment
     plan ("SIP") which permits eligible participants under Section 401(k) of
     the Internal Revenue Code to defer current federal income taxes on
     contributions to the SIP and earnings thereon. The plan is open to both
     management and union (contract) employees. Participants may contribute via
     payroll deductions and can invest in one or more investment funds,
     including the Ameren Common Stock Fund. Ameren, to the extent sufficient
     earnings are available, may partially match contributions made to the SIP
     by participants. The match, if any, and the allocation of matching
     contributions for contract employees are established by the collective
     bargaining agreement of the participant's bargaining unit. Ameren has
     registered 3,000,000 shares of Common Stock for issuance or delivery under
     the SIP. See Registration Statement on Form S-8, which is incorporated by
     reference as Exhibit C-5 hereto.

o    Ameren Corporation Employee Long-term Savings Plan. Ameren sponsors two
     investment savings plans that permit employees of AmerenCIPS and Ameren
     GenCo who are members of certain collective bargaining units to defer
     federal income taxes on contributions to the plans and earnings thereon.
     The plans are qualified plans under Section 401(k) of the Internal Revenue
     Code. Participants can participate in only one plan. Employees who have one
     year of service and have attained the age of 21 can participate in one of
     the available plans. A participant may contribute via payroll deductions
     into a plan and invest in one or more investment funds, including the
     Ameren Common Stock Fund. Ameren, to the extent sufficient earnings are
     available, may partially match contributions made to these plans by
     participants. The match, if any, and the allocation of matching
     contributions are established by the collective bargaining agreement of the
     participant's bargaining unit. Ameren has registered 400,000 shares of
     Common Stock for issuance or delivery under each of these plans. See
     Registration Statement on Form S-8, which is incorporated by reference as
     Exhibit C-6 hereto.

     Ameren proposes to issue shares of its Common Stock under the authorization
and within the limitations set forth herein in order to satisfy its obligations
under each of these existing Plans. Shares of Common Stock issued under these


                                       12



Plans may either be newly issued shares, treasury shares or shares purchased on
the open market pursuant to Rule 42. Ameren also proposes, within the
limitations set forth herein, to issue and/or purchase shares of Common Stock
pursuant to these existing Plans, as they may be amended or extended, and
pursuant to any similar plans or plan funding arrangements hereafter adopted
without any additional Commission order.

     1.9 Guarantees. Ameren requests authorization to provide Guarantees with
respect to financial or contractual obligations of any Subsidiary as may be
appropriate in the ordinary course of such subsidiary's business, in an
aggregate principal or nominal amount not to exceed $1.5 billion outstanding at
any one time, provided however, that the amount of any Guarantees in respect of
obligations of any Non-Utility Subsidiaries shall also be subject to the
limitations of Rule 53(a)(1) or Rule 58(a)(1), as applicable; and provided
further, that any Guarantee that is outstanding on the last day of the
Authorization Period will expire or terminate in accordance with its stated
terms. In addition to providing direct parent guarantees, Ameren may also
provide Guarantees in the form of formal credit enhancement agreements,
including but not limited to "keep well" agreements and reimbursement
undertakings under letters of credit. The proposed limitation on Guarantees
shall not include the amount of any guarantees or other forms of credit support
provided with respect to securities issued by any Financing Subsidiary of Ameren
(the amounts of which would count only against the proposed limitations on the
amounts of debt and equity securities that Ameren may issue). Guarantees may, in
some cases, be provided to support obligations of Subsidiaries that are not
readily susceptible of exact quantification or that may be subject to varying
quantification. In such cases, Ameren will determine the exposure under such
guarantee for purposes of measuring compliance with the proposed limitation on
Guarantees by appropriate means, including estimation of exposure based on loss
experience or projected potential payment amounts. If appropriate, such
estimates will be made in accordance with Generally Accepted Accounting
Principles ("GAAP"). Such estimation will be reevaluated periodically.

     Ameren may charge any Subsidiary a fee for each Guarantee provided on its
behalf that is not greater than the cost, if any, of obtaining the liquidity
necessary to perform the guarantee (for example, bank line commitment fees or
letter of credit fees, plus other transactional expenses) for the period of time
the Guarantee remains outstanding.

     1.10 Hedging Transactions.

          1.10.1 Interest Rate Hedges. Ameren, directly or indirectly through
any Financing Subsidiary, requests authorization to enter into interest rate
hedging transactions with respect to outstanding indebtedness ("Interest Rate
Hedges"), subject to certain limitations and restrictions, in order to reduce or
manage the effective interest rate cost. In no case will the notional amount of
any Interest Rate Hedge exceed the principal amount of the underlying debt
instrument. Transactions will be entered into for a fixed or determinable
period. Thus, Ameren will not engage in speculative transactions. Interest Rate
Hedges (other than exchange-traded interest rate futures contracts) would only
be entered into with counterparties ("Approved Counterparties") whose senior
debt ratings, or the senior debt ratings of any credit support providers who
have guaranteed the obligations of such counterparties, as published by S&P, are
equal to or greater than BBB, or an equivalent rating from Moody's or Fitch,
Inc.


                                       13



     Interest Rate Hedges will involve the use of financial instruments commonly
used in today's capital markets, such as exchange traded interest rate futures
contracts and over the counter interest rate swaps, options, caps, collars,
floors, and structured notes (i.e., a debt instrument in which the principal
and/or interest payments are indirectly linked to the value of an underlying
asset or index), or transactions involving the purchase or sale, including short
sales, of U.S. Treasury Securities. The transactions would be for fixed periods
and stated notional amounts. Fees, commissions and other amounts payable to the
counterparty or exchange (excluding, however, the swap or option payments) in
connection with an Interest Rate Hedge will not exceed those generally
obtainable in competitive markets for parties of comparable credit quality.

          1.10.2 Anticipatory Hedges. In addition, Ameren, directly or
indirectly through any Financing Subsidiary, requests authorization to enter
into interest rate hedging transactions with respect to anticipated debt
offerings (the "Anticipatory Hedges"), subject to certain limitations and
restrictions. Such Anticipatory Hedges (other than exchange-traded interest rate
futures contracts) would only be entered into with Approved Counterparties, and
would be utilized to fix the interest rate and/or limit the interest rate risk
associated with any new issuance through (i) a forward sale of exchange-traded
U.S. Treasury futures contracts, U.S. Treasury Securities and/or a forward swap
(each a "Forward Sale"), (ii) the purchase of put options on U.S. Treasury
Securities (a "Put Options Purchase"), (iii) a Put Options Purchase in
combination with the sale of call options on U.S. Treasury Securities (a "Zero
Cost Collar"), (iv) transactions involving the purchase or sale, including short
sales, of U.S. Treasury Securities, or (v) some combination of a Forward Sale,
Put Options Purchase, Zero Cost Collar and/or other derivative or cash
transactions, including, but not limited to structured notes, caps and collars,
appropriate for the Anticipatory Hedges.

     Anticipatory Hedges may be executed on-exchange ("On-Exchange Trades") with
brokers through the opening of futures and/or options positions traded on the
Chicago Board of Trade, Chicago Mercantile Exchange or other financial exchange,
the opening of over-the-counter positions with one or more counterparties
("Off-Exchange Trades"), or a combination of On-Exchange Trades and Off-Exchange
Trades. Ameren will determine the optimal structure of each Anticipatory Hedge
transaction at the time of execution.

     Ameren will comply with Statement of Financial Accounting Standard ("SFAS")
133 (Accounting for Derivative Instruments and Hedging Activities) and SFAS 138
(Accounting for Certain Derivative Instruments and Certain Hedging Activities)
or other standards relating to accounting for derivative transactions as are
adopted and implemented by the Financial Accounting Standards Board ("FASB").
Ameren represents that each Interest Rate Hedge and each Anticipatory Hedge will
qualify for hedge accounting treatment under the current FASB standards in
effect and as determined as of the date such Interest Rate Hedge or Anticipatory
Hedge is entered into. Ameren will also comply with any future FASB financial
disclosure requirements associated with hedging transactions./12/

----------
12   The proposed terms and conditions of the Interest Rate Hedges and
     Anticipatory Hedges are substantially the same as the Commission has
     approved in other cases. In addition to the Current Financing Order, see
     NiSource Inc., Holding Co. Act Release No. 27789 (December 30, 2003) and
     FirstEnergy Corp., Holding Co. Act Release No. 27694 (June 30, 2003).


                                       14



     1.11 Financing Subsidiaries. In connection with the issuance of long-term
debt and preferred securities, AmerenUE and AmerenCIPS request authorization to
acquire, directly or indirectly, the common stock or other equity securities of
one or more Financing Subsidiaries formed exclusively for the purpose of
facilitating the issuance of such long-term debt securities and/or preferred
securities (including, without limitation, trust preferred securities) and for
the loan or other transfer of the proceeds thereof to AmerenUE or AmerenCIPS, as
applicable. In connection with any such financing transactions, AmerenUE and
AmerenCIPS may enter into one or more guarantees or other credit support
agreements in favor of its Financing Subsidiary./13/ AmerenUE and AmerenCIPS
also request authorization to enter into expense agreements with its respective
Financing Subsidiary, pursuant to which each such company would agree to pay all
expenses of such Financing Subsidiary./14/

     Any Financing Subsidiary organized pursuant to the authority granted by the
Commission in this proceeding shall be organized only if, in management's
opinion, the creation and utilization of such Financing Subsidiary will likely
result in tax savings, increased access to capital markets and/or lower cost of
capital for AmerenUE or AmerenCIPS, as the case may be. No Financing Subsidiary
shall acquire or dispose of, directly or indirectly, any interest in any
"utility asset," as that term is defined under the Act.

     AmerenUE and AmerenCIPS also request authorization to issue to its
Financing Subsidiary, at any time or from time to time in one or more series,
unsecured debentures, unsecured promissory notes or other unsecured debt
instruments or preferred securities (individually, a "Note" and, collectively,
the "Notes") governed by an indenture or indentures or other documents, and the
Financing Subsidiary will apply the proceeds of any external financing by such
Financing Subsidiary plus the amount of any equity contribution made to it from
time to time to purchase the Notes. The terms (e.g., interest rate, maturity,
amortization, prepayment terms, default provisions, etc.) of any such Notes
would generally be designed to parallel the terms of the securities issued by
the Financing Subsidiary to which the Notes relate./15/

     1.12 Certificates of Notification. Ameren proposes to file certificates of
notification pursuant to Rule 24 that report each of the transactions carried
out in accordance with the terms and conditions of and for the purposes
represented in this Application/Declaration. Such certificates of notification
would be filed within 60 days after the end of each of the first three calendar
quarters, and 90 days after the end of the last calendar quarter, in which
transactions occur. The Rule 24 certificates will contain the following
information for the reporting period:

----------
13   Guarantees or other credit support provided by AmerenUE and AmerenCIPS with
     respect to securities issued by any Financing Subsidiary will be exempt
     under Rules 52(a) and 45(b)(7) if the conditions of such rules are
     satisfied.

14   The authorization requested herein is substantially identical to the
     authorization to organize and acquire the securities of Financing
     Subsidiaries previously granted to Ameren under the December 18, 2003
     order, supra n. 8.

15   "Mirror image" Notes issued by AmerenUE or AmerenCIPS to its Financing
     Subsidiary will be exempt under Rule 52(a) if the conditions of Rule 52(a)
     are satisfied.


                                       15



          a.   The sales of any Common Stock and the purchase price per share
               and the market price per share at the date of the agreement of
               sale;

          b.   The total number of shares of Common Stock issued or issuable
               under options, warrants or other stock-purchase rights granted
               during the quarter under the Plans;

          c.   If Common Stock has been transferred to a seller of securities of
               a company being acquired, the number of shares so issued, the
               value per share and whether the shares are restricted to the
               acquiror;

          d.   The amount and terms of any Long-term Debt, Preferred Stock,
               Preferred Securities or Equity-linked Securities issued directly
               or indirectly by Ameren during the calendar quarter;

          e.   The amount and terms of any Short-term Debt issued directly or
               indirectly by Ameren during the calendar quarter;

          f.   A description of the amount, terms and purpose of any Guarantee
               issued during the calendar quarter by Ameren and the name of the
               Subsidiary benefiting from such Guarantee;

          g.   The name and amount invested by Ameren, AmerenUE and AmerenCIPS
               in any Financing Subsidiary during the calendar quarter;

          h.   The notional amount and principal terms of any Interest Rate
               Hedge or Anticipatory Hedge entered into during the quarter and
               the identity of the parties to such instruments; and

          i.   Consolidated balance sheet of Ameren, AmerenUE and AmerenCIPS as
               of the end of the calendar quarter./16/

ITEM 2. FEES, COMMISSIONS AND EXPENSES.
        ------------------------------

     The fees, commissions and expenses incurred or to be incurred in connection
with the preparation and filing of this Application/Declaration are estimated
not to exceed $25,000. Fees, commissions and expenses incurred in connection
with any financing transaction approved in this proceeding will be within the
limits set forth in Item 1.5 above.

ITEM 3. APPLICABLE STATUTORY PROVISIONS.
        -------------------------------

     3.1 General. Sections 6(a) and 7 of the Act are applicable to the issuance
and sale of Common Stock, Preferred Stock, Preferred Securities, Equity-linked
Securities, Long-term Debt and Short-term Debt by Ameren. Sections 6(a) and 7 of
the Act are also applicable to the execution of Interest Rate Hedges and
Anticipatory Hedges by Ameren. Sections 6(a), 7 and 12(b) of the Act and Rule

----------
16   Any of the information described in items (a) through (i) that is provided
     in filings under the 1933 Act or the 1934 Act may be incorporated into the
     Rule 24 certificate by reference.


                                       16



45(a) are applicable to the issuance of Guarantees by Ameren. Sections 6(a), 7,
9(a)(1), 10 and 12(b) are applicable to the organization and acquisition of
securities of Financing Subsidiaries by AmerenUE and AmerenCIPS.

     3.2 Compliance with Rules 53 and 54. The transactions proposed herein are
also subject to Rules 53 and 54. Under Rule 53(a), the Commission shall not make
certain specified findings under Sections 7 and 12 in connection with a proposal
by a holding company to issue securities for the purpose of acquiring the
securities of or other interest in an EWG, or to guarantee the securities of an
EWG, if each of the conditions in paragraphs (a)(1) through (a)(4) thereof are
met, provided that none of the conditions specified in paragraphs (b)(1) through
(b)(3) of Rule 53 exists. Rule 54 provides that the Commission shall not
consider the effect of the capitalization or earnings of subsidiaries of a
registered holding company that are EWGs or FUCOs in determining whether to
approve other transactions if Rule 53(a), (b) and (c) are satisfied. These
standards are met.

     Rule 53(a)(1): Ameren's "aggregate investment" (as defined in Rule
53(a)(1)) in EWGs as of December 31, 2003 was $425,165,404, or approximately
23.4% of Ameren's "consolidated retained earnings" (also as defined in Rule
53(a)(1)) for the four quarters ended December 31, 2003 ($1,813,903,019). Ameren
does not currently hold an interest in any FUCO.

     Rule 53(a)(2): Ameren will maintain books and records enabling it to
identify investments in and earnings from each such EWG and FUCO in which it
directly or indirectly acquires and holds an interest. Ameren will cause each
domestic EWG in which it acquires and holds an interest, and each foreign EWG
and FUCO that is a majority-owned subsidiary, to maintain its books and records
and prepare its financial statements in conformity with U.S. GAAP. All of such
books and records and financial statements will be made available to the
Commission, in English, upon request.

     Rule 53(a)(3): No more than 2% of the employees of Ameren's domestic public
utility subsidiaries will, at any one time, directly or indirectly, render
services to EWGs and FUCOs.

     Rule 53(a) (4): Ameren will submit a copy of each Application/Declaration,
and each amendment thereto, relating to any EWG or FUCO, and will submit copies
of any Rule 24 certificates required thereunder, as well as a copy of the
relevant portions of Ameren's Form U5S, to each of the public service
commissions having jurisdiction over the retail rates of Ameren's domestic
public utility subsidiaries.

     In addition, Ameren states that the provisions of Rule 53(a) are not made
inapplicable to the authorization herein requested by reason of the occurrence
or continuance of any of the circumstances specified in Rule 53(b). Rule 53(c)
is inapplicable by its terms.

ITEM 4. REGULATORY APPROVAL.
        -------------------

     The approval of the ICC may be required in order for AmerenUE or AmerenCIPS
to acquire the equity securities of any Financing Subsidiary. Such approval, if
required, will be obtained at the time AmerenUE or AmerenCIPS seeks ICC approval
to issue securities through any Financing Subsidiary. No other state commission,


                                       17



and no federal commission, other than the Commission, has jurisdiction over any
of the transactions proposed in this Application/Declaration.

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

     The Commission is requested to publish a notice under Rule 23 with respect
to the filing of this Application/Declaration as soon as practicable. Ameren
requests 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.
Ameren hereby waives 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 such Division opposes the matters proposed herein.

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

        A. EXHIBITS.
           --------

           A-1  Restated Articles of Incorporation of Ameren (incorporated by
                reference to Annex F to the Registration Statement on Form S-4
                of Ameren in File No. 33-64165).

           A-2  Certificate of Amendment to the Restated Articles of
                Incorporation of Ameren as filed with the Secretary of State of
                the State of Missouri on December 14, 1998 (incorporated by
                reference to Exhibit 3(i) to Ameren's Annual Report on Form 10-K
                for the year ended December 31, 1998 in File No. 1-14756).

           A-3  By-Laws of Ameren, as amended to February 13, 2004 (incorporated
                by reference to Exhibit 4.3 to Registration Statement on Form
                S-3, as filed February 13, 2004, in File No. 333-112823).

           B    None.

           C-1  Registration Statement on Form S-3 ("shelf" registration), as
                amended (incorporated by reference to File Nos. 333-89970,
                333-89970-1, and 333-89970-02).

           C-2  Registration Statement on Form S-3, including Prospectus for
                Dividend Reinvestment and Stock Purchase Plan, as filed June 15,
                2000 (incorporated by reference to File No. 333-39400).

           C-3  Registration Statement on Form S-3, including Prospectus for
                Dividend Reinvestment and Stock Purchase Plan, as filed February
                13, 2004 (incorporated by reference to File No. 333-112823).

           C-4  Registration Statement on Form S-8, as filed April 23, 1998
                (incorporated by reference to File No. 333-50793).


                                       18



           C-5  Registration Statement on Form S-8, as filed October 24, 2001
                (incorporated by reference to File No. 333-72156).

           C-6  Registration Statement on Form S-8, as filed November 26, 2002
                (incorporated by reference File No. 333-101506).

           D    None at this time.

           E    Organizational Chart (Form SE).

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

           G    Proposed Form of Federal Register Notice.

           H    Ameren Corporation Long-term Incentive Plan of 1998.
                (Incorporated by reference to Exhibit 10.1 to Ameren's Annual
                Report on Form 10-K for the year ended December 31, 1998, in
                File No. 1-14756).

           I    Forecast of consolidated capitalization ratios as of December
                31, 2003 through December 31, 2007 (to be filed confidentially
                by amendment pursuant to Rule 104).

           J    Forecast assumptions (sources and uses) for each year 2004- 2007
                (to be filed confidentially by amendment pursuant to Rule 104).

        B. FINANCIAL STATEMENTS.
           --------------------

     FS-1  Ameren Consolidated Statement of    Incorporated by reference to
           Income for the year ended           Current Report of Ameren on
           December 31, 2003                   Form 8-K, as furnished to the
                                               Commission on February 10,
                                               2004 in File No. 1-14756

     FS-2  Ameren Consolidated Balance         Incorporated by reference to
           Sheet as of December 31, 2003       Current Report of Ameren on
                                               Form 8-K, as furnished to the
                                               Commission on February 10,
                                               2004 in File No. 1-14756

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

     None of the matters that are the subject of this Application/Declaration
involves a "major federal action" nor do such matters "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/Declaration will not result in changes in the operation of
the Applicants that will have an impact on the environment. The Applicants 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/Declaration.


                                       19



                                    SIGNATURE

     Pursuant to the requirements of the Public Utility Holding Company Act of
1935, the undersigned Applicants have duly caused this Application/Declaration
to be signed on their behalves by the undersigned thereunto duly authorized.


                                         AMEREN CORPORATION
                                         UNION ELECTRIC COMPANY
                                         CENTRAL ILLINOIS PUBLIC SERVICE COMPANY

                                         By: /s/ Jerre E. Birdsong
                                                 -----------------
                                         Name:   Jerre E. Birdsong
                                         Title:  Vice President and Treasurer


Date: February 24, 2004


                                       20