(As filed on December 18, 2003)

                                                               File No. 70-10159



                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   FORM U-1/A

                                 Amendment No. 1
                                       to
                           APPLICATION OR DECLARATION
                                      UNDER
                 THE PUBLIC UTILITY HOLDING COMPANY ACT OF 1935

                               Ameren Corporation
                               Ameren Energy, Inc.
                           Ameren Development Company
                                Ameren ERC, Inc.
                         Ameren Energy Resources Company
                         Ameren Energy Marketing Company
                    Ameren Energy Fuels and Services Company
                          Illinois Materials Supply Co.
                        Missouri Central Railroad Company
                     Union Electric Development Corporation
                          AFS Development Company, LLC
                              1901 Chouteau Avenue
                            St. Louis, Missouri 63103

                            CIPSCO Investment Company
                              607 East Adams Street
                           Springfield, Illinois 62739

                       CILCORP Investment Management Inc.
                              CILCORP Ventures Inc.
                          CILCORP Energy Services Inc.
                              QST Enterprises Inc.
                    CILCO Exploration and Development Company
                            CILCO Energy Corporation
                               300 Liberty Street
                             Peoria, Illinois 61602





                AmerenEnergy Medina Valley Cogen (No. 4), L.L.C.
                AmerenEnergy Medina Valley Cogen (No. 2), L.L.C.
                    AmerenEnergy Medina Valley Cogen, L.L.C.
                  AmerenEnergy Medina Valley Operations, L.L.C.
                                  P.O. Box 230
                         Mossville, Illinois 61552-0230

                    (Names of companies filing this statement
                  and addresses of principal executive offices)
              ----------------------------------------------------

                               AMEREN CORPORATION

                    (Name of top registered holding company)

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

              Steven R. Sullivan, Vice President 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:

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 Transactions...............................1
         1.1  Description of Applicants.....................................1
         1.2  Prior Order...................................................3
         1.3  Summary of Approvals Requested................................6
         1.4  Acquisition of Certain Non-Exempt Subsidiaries................6
         1.5  Development Activities and Administrative Activities.........11
         1.6  Guarantees by Non-Utility Subsidiaries.......................11
         1.7  Sales of Services and Goods Among Non-Utility Subsidiaries...12
         1.8  Sale of Certain Goods and Services by Non-Utility
              Subsidiaries Outside the United States.......................13
         1.9  Sale of Agency Services by Ameren Energy and AE Marketing
              to Utility Subsidiaries......................................14
        1.10  Investments in Energy-Related Assets.........................15
        1.11  Payment of Dividends Out of Capital and Unearned Surplus.....16
        1.12  Anticipatory Interest Rate Hedges by Non-Utility
              Subsidiaries.................................................17
        1.13  Changes in Capitalization of Non-Utility Subsidiaries;
              Subsequent Internal Reorganizations of Non-Utility
              Subsidiaries.................................................18
        1.14  Rule 24 Reports..............................................19

Item 2.  Fees, Commissions and Expenses....................................20

Item 3.  Applicable Statutory Provisions...................................20
         3.1  General......................................................20
         3.2  Compliance with Rule 54......................................21

Item 4.  Regulatory Approval...............................................22

Item 5.  Procedure.........................................................22

Item 6.  Exhibits and Financial Statements.................................22

Item 7.  Information as to Environmental Effects...........................23


                                       i



     The Application/Declaration filed in this proceeding on August 20, 2003 is
hereby amended and restated in its entirty to read as follows:

ITEM 1    DESCRIPTION OF PROPOSED TRANSACTIONS.
          ------------------------------------

          1.1   Description of Applicants
                     -------------------------

          (a)  Ameren Corporation and its Utility Subsidiaries. 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 ("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 parts of Missouri and Illinois.

     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"), an electric utility generating
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 ("Customer Choice Law"). In
October 2003, AmerenCILCO transferred substantially all of its generating assets
to AERG, representing a total of approximately 1100 MW of installed generating
capacity.

     AmerenUE, AmerenCIPS, AmerenCILCO, and AERG are herein referred to
collectively as the "Utility Subsidiaries."

          (b)  Direct Non-Utility Subsidiaries of Ameren. Ameren has five direct
wholly-owned non-utility subsidiaries (in addition to CILCORP Inc., the direct
parent of AmerenCILCO), as follows:

o    Ameren Services Company ("Ameren Services"), 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 holds all of the outstanding
     common stock of Ameren Energy Communications, Inc., an "exempt
     telecommunications company" ("ETC") under Section 34 of the Act, and Ameren
     ERC, Inc. ("Ameren ERC"), an "energy-related company" under Rule 58. Ameren
     ERC, directly and through two majority-owned subsidiaries, provides energy
     management services. Ameren ERC also holds all of the outstanding common
     stock of Missouri Central Railroad Company, a fuel transportation
     subsidiary.


                                       1



o    Ameren Energy Resources Company ("Ameren Energy Resources"), an
     intermediate non-utility holding company, which directly holds all of the
     outstanding voting securities of the following subsidiaries:(1) (1) Ameren
     Energy Development Company ("Ameren Energy Development"), 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) (2) Ameren Energy Marketing
     Company "(AE Marketing"), an "energy-related company" under Rule 58; (3)
     Ameren Energy Fuels and Services Company, also an "energy-related company"
     under Rule 58, which, in turn, owns all of the membership interests of AFS
     Development Company, L.L.C., an "energy-related company" organized to make
     investments in and engage in operating activities related to oil and gas,
     coal bed methane, and other energy commodities, and 71% of the membership
     interests in Cowboy Railroad Development Company, a fuel transportation
     subsidiary; (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 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., which operates AmerenEnergy Medina Valley
     Cogen's generating facility.

o    Ameren Energy, Inc. ("Ameren Energy"), 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.

o    CIPSCO Investment Company ("CIC"), 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.

          (c)  Direct Non-Utility Subsidiary of AmerenUE. AmerenUE has one
direct wholly-owned non-utility subsidiary, Union Electric Development
Corporation ("UEDC"), which holds investments in affordable housing projects and
historic restoration projects that qualify for federal and/or state income tax
credits, and other passive investments.(3)

          (d)  Direct Non-Utility Subsidiaries of CILCORP. CILCORP directly owns
all of the common stock of three non-utility subsidiaries, as follows:


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

(1)  Ameren Energy Resources also directly holds 20% of the outstanding common
     stock of Electric Energy, Inc., an EWG.

(2)  Ameren GenCo was organized in order to facilitate the restructuring of
     AmerenCIPS in accordance with the Customer Choice Law. In May 2000, Ameren
     GenCo acquired all of the existing generating assets of AmerenCIPS.

(3)  AmerenUE also directly holds 40% of the outstanding common stock of
     Electric Energy, Inc., an EWG.


                                       2



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

o    CILCORP Ventures Inc., an intermediate subsidiary, which owns all of the
     outstanding common stock of CILCORP Energy Services, Inc., an
     "energy-related company" under Rule 58 that provides energy-related
     products and services, including gas management services for gas management
     customers, and 80% of the outstanding common stock of Agricultural Research
     & Development Corp., which has pursued commercialization of agricultural
     research in central Illinois as part of a combined private/government
     effort to boost the local economy and create jobs in the region.

o    QST Enterprises Inc. ("QST"), which, through its subsidiary, CILCORP
     Infraservices, Inc., 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).
     QST also holds the stock of other inactive subsidiaries.

          (e)  Direct Non-Utility Subsidiaries of AmerenCILCO. In addition to
AERG, a wholly-owned electric utility generating subsidiary, AmerenCILCO
directly owns all of the issued and outstanding common stock of two non-utility
subsidiaries: CILCO Exploration and Development Company, which has engaged in
the exploration and development of gas, oil, coal and other mineral resources;
and CILCO Energy Corporation, an "energy-related company" under Rule 58 that was
formed to research and develop new sources of energy, including the conversion
of coal and other minerals into gas. Neither company conducts any significant
business at this time.

     Filed herewith as Exhibit E hereto is an organizational chart showing the
corporate relationships of Ameren and its subsidiaries.

     The direct and indirect non-utility subsidiaries of Ameren listed on the
signature page of this Application/Declaration and described above are herein
referred to collectively as the "Non-Utility Subsidiaries." The term Non-Utility
Subsidiaries also includes any new non-utility company hereafter acquired or
formed directly or indirectly by Ameren in a transaction that is exempt under
Rule 58 under the Act or which is acquired pursuant to authorization by the
Commission. Ameren and the Non-Utility Subsidiaries are referred to as the
"Applicants."

          1.2  Prior Order. By order dated July 23, 1999 in File No. 70-9427
(the "1999 Order"),(4) Ameren, AmerenUE and certain direct and indirect
non-utility subsidiaries of Ameren were authorized to engage in various
transactions from time to time through December 31, 2003 relating generally to
Ameren's reorganization of its non-utility subsidiary companies and the
acquisition and ownership of new non-utility subsidiaries. Specifically,

               (i) Ameren was authorized to consolidate its existing and future
non-utility businesses under Ameren Development or other new or existing
non-utility subsidiary companies and to engage through such companies in


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

(4)  See Ameren Corporation, et al., Holding Co. Act Rel. No. 27053.


                                       3



preliminary development activities ("Development Activities")(5) relating to
potential new investments in non-utility businesses and to engage in
administrative and management activities ("Administrative Activities")(6)
associated with such non-utility businesses;

               (ii) Ameren was authorized to acquire, directly or indirectly,
the equity securities of one or more new subsidiaries ("Intermediate
Subsidiaries") organized exclusively for the purpose of acquiring, holding
and/or financing the acquisition of the securities of or other interest in EWGs,
"foreign utility companies" ("FUCOs"), ETCs, "energy-related companies" under
Rule 58 ("Rule 58 Subsidiaries") or other non-utility companies the acquisition
of which has been expressly authorized by the Commission;

               (iii) Ameren was authorized to acquire, directly or indirectly,
the equity securities of one or more new subsidiaries ("Financing Subsidiaries")
organized exclusively for the purpose of issuing long-term debt or equity
securities to investors other than Ameren in order to finance, in whole or in
part, Ameren's direct or indirect acquisition of EWGs, FUCOs, ETCs
(collectively, "Exempt Subsidiaries") and Rule 58 Subsidiaries, and to provide
guarantees, if necessary, of securities issued by Financing Subsidiaries;(7)

               (iv) Ameren was authorized to acquire, directly or indirectly,
the equity securities of one or more new subsidiaries ("Special Purpose
Subsidiaries") organized to acquire the existing assets of UEDC or CIC and
Special Purpose Subsidiaries were authorized to engage in (a) any of the
businesses or activities that UEDC or CIC were engaged in at the time Ameren
became a registered holding company and which would not otherwise qualify as
permitted or exempt businesses under Rule 58 or Section 34, as the case may be;
(b) offering and servicing of customer financing for purchases of home and
business heating, cooling, and energy conservation and management equipment,
services and supplies; (c) Development Activities and operations and
maintenance, construction and construction management, fuel procurement and


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

(5)  Development Activities are limited to due diligence and design review;
     market studies; preliminary engineering; site inspection; preparation of
     bid proposals, including, in connection therewith, posting of bid bonds;
     application for required permits and/or regulatory approvals; acquisition
     of site options and options on other necessary rights; negotiation and
     execution of contractual commitments with owners of existing facilities,
     equipment vendors, construction firms, power purchasers, thermal "hosts,"
     fuel suppliers and other project contractors; negotiation of financing
     commitments with lenders and other third-party investors; and such other
     preliminary activities as may be required in connection with the purchase,
     acquisition or construction of facilities or the securities of other
     companies. Ameren was authorized to expend up to $250 million during the
     authorization period on Development Activities.

(6)  Administrative Activities include ongoing personnel, accounting,
     engineering, legal, financial, and other support activities necessary to
     manage Development Activities and investments in non-utility subsidiaries.

(7)  The Commission reserved jurisdiction under the 1999 Order over the transfer
     of financing proceeds by a Financing Subsidiary to Ameren, but released
     such reserved jurisdiction by order dated October 5, 2001 (Holding Co. Act
     Release No. 27449).


                                       4



other types of activities for or on behalf of associate non-utility companies;
(d) marketing of bill payment protection insurance; (e) the offering of economic
development services to expanding or relocating businesses; (f) the offering of
customer goodwill and retention programs; and (g) the marketing of power outage
insurance;

               (v) Ameren's existing and future non-utility subsidiaries were
authorized to provide guarantees and other forms of credit support with respect
to securities or other obligations of each other in an aggregate amount at any
time outstanding not to exceed $300 million, in addition to any guarantees that
are exempt under Rules 45(b)(7) and 52, provided that any such guarantee or
other credit support outstanding on December 31, 2003 shall remain outstanding
until it expires in accordance with its terms;

               (vi) Ameren's non-utility subsidiaries were granted an exemption
under Section 13(b) of the Act from the "at cost" standard of Rule 90 and 91 in
connection with rendering services and selling goods to each other in certain
specified circumstances;

               (vii) To the extent required, AmerenUE and AmerenCIPS were
authorized to provide personnel and technical services to Ameren's non-utility
subsidiaries "at cost" in accordance with Rules 90 and 91;(8)

               (viii) Rule 58 Subsidiaries and Special Purpose Subsidiaries were
authorized to sell Energy Management Services(9) and Technical Support
Services(10) and related customer financing anywhere outside the United States


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

(8)  The Commission has noted that Rule 87(b)(1) exempts from prior Commission
     approval services rendered by a public-utility company to its associate
     companies "at cost." See Cinergy Corp., et al., Holding Co. Act Release
     No.27016 (May 4, 1999), fn. 2.

(9)  Energy Management Services include the marketing, sale, installation,
     operation and maintenance of various products and services related to
     energy management and demand-side management, including energy and
     efficiency audits; facility design and process control and enhancements;
     construction, installation, testing, sales and maintenance of (and training
     client personnel to operate) energy conservation equipment; design,
     implementation, monitoring and evaluation of energy conservation programs;
     development and review of architectural, structural and engineering
     drawings for energy efficiencies, design and specification of energy
     consuming equipment; and general advice on programs; the design,
     construction, installation, testing, sales and maintenance of new and
     retrofit heating, ventilating, and air conditioning ("HVAC"), electrical
     and power systems, alarm and warning systems, motors, pumps, lighting,
     water, water-purification and plumbing systems, and related structures, in
     connection with energy-related needs; and the provision of services and
     products designed to prevent, control, or mitigate adverse effects of power
     disturbances on a customer's electrical systems.

(10) Technical Support Services include technology assessments, power factor
     correction and harmonics mitigation analysis, meter reading and repair,
     rate schedule design and analysis, environmental services, engineering
     services, billing services (including consolidation billing and bill
     disaggregation tools), risk management services, communications systems,
     information systems/data processing, system planning, strategic planning,
     finance, feasibility studies, and other similar services.


                                       5



and certain goods and services outside the United States; and engage in
electricity and energy commodity brokering and marketing in Canada;(11)

               (ix) Ameren Energy was authorized to act as agent for AmerenUE
and AmerenCIPS in connection with the brokering and marketing of electricity and
other energy commodities, such agency services to be provided "at cost" in
accordance with Rules 90 and 91;

               (x) Ameren Energy (or other marketing subsidiary subsequently
acquired by Ameren) were authorized to expend up to $400 million in connection
with the acquisition or construction, in one or more transactions, of certain
types of non-utility energy-related assets ("Energy-Related Assets") in the
United States that are functionally related to and would assist Ameren Energy in
connection with energy marketing, brokering and trading, including natural gas
production, gathering, processing, storage and transportation facilities;

               (xi) Ameren Development, Rule 58 Subsidiaries and other non-
utility subsidiaries of Ameren were authorized to pay dividends out of capital
and unearned surplus to the extent permitted by law and applicable credit
instruments that restrict the payment of dividends; and

               (xii) Ameren Development, Rule 58 Subsidiaries and other non-
utility subsidiaries were authorized to enter into certain interest rate hedging
transactions ("Anticipatory Hedges") with respect to anticipated debt offerings,
subject to certain restrictions.(12)

          1.3  Summary of Approvals Requested. In this Application/Declaration,
the Applicants are seeking to extend and restate their current authorization
under the 1999 Order for the period through December 31, 2006 (the
"Authorization Period"), subject to a continuation of the Commission's
reservation of jurisdiction over certain specified proposals, as described
below.

          1.4  Acquisition of Certain Non-Exempt Subsidiaries. In addition to
acquiring and holding the securities of Exempt Subsidiaries in transactions that
are exempt pursuant to Section 32, 33, or 34, as applicable, or Rule 58
Subsidiaries, in transactions that are exempt pursuant to Rule 58, Ameren
requests authority through the Authorization Period to organize and acquire,
directly or indirectly, the equity securities of one or more Intermediate
Subsidiaries, Special Purpose Subsidiaries and Financing Subsidiaries. Funds for
any direct or indirect investment in any Intermediate Subsidiary, Special
Purpose Subsidiary or Financing Subsidiary will be derived from available funds,


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

(11) The Commission reserved jurisdiction over certain other proposed
     non-utility energy activities of Rule 58 Subsidiaries and Special Purpose
     Subsidiaries outside the United States pending completion of the record.

(12) Interest rate hedges with respect to existing indebtedness of non-utility
     subsidiaries are exempt pursuant to Rule 52(b).


                                       6



proceeds of financings by Ameren that are authorized in separate
proceedings,(13) and/or proceeds of financings by Non-Utility Subsidiaries that
are exempt under Rule 52(b). Ameren is not requesting any additional financing
authorization in this Application/Declaration.

          (a) Intermediate Subsidiaries. Ameren proposes to acquire, directly or
indirectly through Non-Utility Subsidiaries, the securities of one or more
Intermediate Subsidiaries, which would be organized exclusively for the purpose
of acquiring, holding and/or financing the acquisition of the securities of or
other interest in one or more Exempt Subsidiaries, Rule 58 Subsidiaries, or
other current or future non-exempt subsidiaries that have been authorized by the
Commission ("Non-Exempt Subsidiaries"), provided that Intermediate Subsidiaries
may also engage in Development Activities and Administrative Activities relating
to such subsidiaries. To the extent such transactions are not exempt from the
Act or otherwise authorized or permitted by rule, regulation or order of the
Commission issued thereunder, Ameren requests authority for Intermediate
Subsidiaries to engage in the activities described herein.

     There are several legal and business reasons for the use of Special Purpose
subsidiaries such as the Intermediate Subsidiaries in connection with making
investments in Exempt Subsidiaries, Rule 58 Subsidiaries and other Non-Exempt
Subsidiaries. For example, the formation and acquisition of Special Purpose
subsidiaries is often necessary or desirable to facilitate financing the
acquisition and ownership of a FUCO, an EWG or another non-utility enterprise.
Furthermore, the laws of some foreign countries may require that the bidder in a
privatization program be organized in that country. In such cases, it would be
necessary for Ameren or Ameren Development to form a foreign subsidiary as the
entity (or participant in the entity) that submits the bid or other proposal. In
addition, the interposition of one or more Intermediate Subsidiaries may allow
Ameren to defer the repatriation of foreign source income, or to take full
advantage of favorable tax treaties among foreign countries, or otherwise to
secure favorable U.S. income tax treatment that would not otherwise be
available. Intermediate Subsidiaries would also serve to isolate business risks,
facilitate subsequent adjustments to, or sales of, ownership interests by or
among the members of the ownership group, or to raise debt or equity capital in
domestic or foreign markets.

     An Intermediate Subsidiary may be organized, among other things, (1) in
order to facilitate the making of bids or proposals to develop or acquire an
interest in any Exempt Subsidiary, Rule 58 Subsidiary or Non-Exempt Subsidiary;
(2) after the award of such a bid proposal, in order to facilitate closing on
the purchase or financing of such acquired company; (3) at any time subsequent
to the consummation of an acquisition of an interest in any such company in
order, among other things, to effect an adjustment in the respective ownership
interests in such business held by Ameren and any non-affiliated investors;


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

(13) Ameren is currently authorized by order dated October 5, 2001 in File
     No. 70-9877 to issue and sell, from time to time through September 30,
     2004, common stock, long-term debt and preferred equity securities,
     directly or indirectly through one or more Financing Subsidiaries, and
     short-term debt securities and to provide guarantees on behalf of its
     subsidiaries (Holding Co. Act Release No. 27449) (the "Ameren Financing
     Order").


                                       7



(4) to facilitate the sale of ownership interests in one or more acquired
non-utility companies; (5) to comply with applicable laws of foreign
jurisdictions limiting or otherwise relating to the ownership of domestic
companies by foreign nationals; (6) as a part of tax planning in order to limit
Ameren's exposure to U.S. and foreign taxes; (7) to further insulate Ameren and
the Utility Subsidiaries from operational or other business risks that may be
associated with investments in non-utility companies; or (8) for other lawful
business purposes.

     Investments in Intermediate Subsidiaries may take the form of any
combination of the following: (1) purchases of capital shares, partnership
interests, member interests in limited liability companies, trust certificates
or other forms of equity interests; (2) capital contributions; (3) open account
advances without interest; (4) loans; and (5) guarantees issued, provided or
arranged in respect of the securities or other obligations of any Intermediate
Subsidiaries. Funds for any direct or indirect investment by Ameren in any
Intermediate Subsidiary will be derived from (1) borrowings, sales of common
stock and preferred securities, and guarantees by Ameren, as authorized by the
Commission in separate proceedings, (2) other available cash resources of
Ameren, and (3) proceeds of securities sales by Non-Utility Subsidiaries that
are exempt pursuant to Rule 52. To the extent that Ameren provides funds
directly or indirectly to an Intermediate Subsidiary which are used for the
purpose of making an investment in any EWG or FUCO or a Rule 58 Subsidiary, the
amount of such funds will be included in Ameren's "aggregate investment" in such
entities, as calculated in accordance with Rule 53 or Rule 58, as applicable.
Accordingly, investments in Intermediate Subsidiaries will not result in any
increase in the aggregate amount that may be invested in EWGs, FUCOs, Rule 58
Subsidiaries or any other Non-Exempt Subsidiary that is subject to any
investment limitation under the Act.(14)

          (b)  Financing Subsidiaries. The Applicants request authority to
acquire, directly or indirectly, the equity securities of one or more
corporations, trusts, partnerships or other entities created specifically for
the purpose of facilitating the financing of the Applicants' authorized and
exempt activities (including exempt and authorized acquisitions) through the
issuance of long-term debt or equity securities to third parties and the
transfer of the proceeds of such financings to the parent company of the
Financing Subsidiary. Ameren represents that it has in place sufficient internal
controls to enable it to monitor the creation and use of any Financing
Subsidiary. 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 Ameren of a Non-Utility Subsidiary, as applicable.

     The amount and terms (i.e., interest rate, maturity, etc.) of any long-term
debt or preferred equity securities issued by a Financing Subsidiary of Ameren
will count against the limitation and comply with the specific terms applicable
to that type of security under the Ameren Financing Order or any subsequent


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

(14) This "conduit" approach to tracking and accounting for investments in
     Intermediate Subsidiaries based on the ultimate application of funds
     invested has been approved in numerous cases. In addition to the 1999
     Order, see Progress Energy, Inc., et al., Holding Co. Act Release No. 27297
     (Dec. 12, 2000), Exelon Corporation, Holding Co. Act Release No. 27545
     (June 27, 2002), and SCANA Corporation, et al., Holding Co. Act Release
     No. 27649 (Feb. 12, 2003).


                                       8



order approving financing by Ameren. Ameren may, if required, guarantee or enter
into expense agreements in respect of the obligations of any such Financing
Subsidiaries. To avoid double counting, however, the guarantee of that security
by Ameren would not also be counted against the then current limit on guarantees
that Ameren is authorized to issue. Non-Utility Subsidiaries may also provide
guarantees and enter into expense agreements, if required, on behalf of such
entities pursuant to Rules 45(b)(7) and 52, as applicable. Ameren further
requests authorization to issue its unsecured subordinated promissory notes
("Subordinated Notes") to any Financing Subsidiary to evidence a loan of the
proceeds of any financing by a Financing Subsidiary to Ameren. The amount and
terms (i.e., interest rate, maturity, default provisions, prepayment terms,
etc.) of any Subordinated Notes issued by Ameren to a Financing Subsidiary will
be designed to parallel the amount and terms of the specific securities of a
Financing Subsidiary in respect of which such Subordinated Notes are issued.
Again, to avoid double counting, the amount of Subordinated Notes issued by
Ameren to any Financing Subsidiary will not be counted against the then
applicable limit on long-term debt and preferred equity securities that Ameren
is authorized to issue.

          (c)  Special Purpose Subsidiaries. Ameren requests authority to
acquire, directly or indirectly through a Non-Utility Subsidiary, the equity
securities of one or more Special Purpose Subsidiaries. Investments in Special
Purpose Subsidiaries may take the same form as investments in Intermediate
Subsidiaries, as described above. Ameren proposes to invest in such entities an
aggregate amount at any time outstanding not to exceed $250 million. Special
Purpose Subsidiaries request approval, to the extent required, to purchase or
otherwise acquire any of the assets of or securities held by UEDC and/or CIC at
the time Ameren became a registered holding company, and UEDC and CIC request
authorization, to the extent needed, to sell or otherwise transfer such assets
or securities to Special Purpose Subsidiaries.(15)

     In addition, Special Purpose Subsidiaries may also be formed to engage in
any of the following additional businesses or activities:

          (i)  Customer Financing. Making or guaranteeing loans to customers to
          finance the purchase of home and business heating, ventilation and
          cooling equipment; energy conservation and management equipment,
          products and services; lighting equipment and supplies; and home and
          business security systems. Such financing may also take the form of
          agreements to purchase from vendors of such equipment and supplies
          installment purchase obligations executed by their customers. Ameren
          proposes that the aggregate principal amount of loans, guarantees or
          customer installment obligations with respect to which there is


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

(15) UEDC and CIC are engaged directly or through subsidiaries in certain
     non-utility businesses, including automated meter reading, the sale of
     appliance warranties, and demand side management programs. Transfers of
     such securities or assets to a Special Purpose Subsidiary may be effected
     by sale or by distributions by UEDC, CIC and AmerenUE to Ameren, followed
     by Ameren's contribution of such securities or assets to Ameren
     Development.


                                       9



          recourse to any Special Purpose Subsidiary shall not exceed $300
          million at any one time during the Authorization Period.(16)

          (ii) Development Activities and Other Project Activities. Development
          Activities (as defined in the 1999 Order) and operations and
          maintenance, construction and construction management, fuel
          procurement and other types of services for or on behalf of any
          Non-Utility Subsidiary. Ameren envisions that such Special Purpose
          Subsidiaries will be needed in order to, among other things, establish
          and manage project development offices, and to provide operations and
          maintenance, construction or asset management services, whether to an
          associate company or to a non-associate company. Creating separate
          subsidiaries for such purposes would, among other things, facilitate
          joint ventures with non-associate companies, isolate the risks of one
          business activity from others, and facilitate the segregation of labor
          and benefits programs offered to different categories of employees.

          (iii) Bill Payment Insurance. The marketing of energy bill payment
          insurance in Illinois and Missouri, which would enable utility
          customers to pay their energy bills in the event of unemployment,
          illness, disability or death. This program would be underwritten and
          administered by an independent insurance company or companies.(17)

          (iv) Economic Development Services. The offering of economic
          development services for businesses wishing to expand or relocate
          their facilities to anywhere within the wholesale or retail service
          area of the Utility Subsidiaries, including consultation with local
          economic development officials, building and site screening,
          customized tax comparison studies and workforce analyses, liaison
          services to identify financing and leasing sources for building
          construction, equipment and working capital, and other similar
          services. These services will be similar in scope to those which the
          Utility Subsidiaries have in the past provided to relocating
          businesses, often without charge. Ameren states that minimal capital
          will be required to provide these types of services and that, without
          further order of the Commission, it will not acquire any securities of
          or other interest in any industrial/commercial development enterprise
          except as may be permitted by Rule 40(a)(5).


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

(16) Although such customer financing activities by a non-utility subsidiary are
     beyond the scope of Rule 58 and/or Rule 48, the Commission has granted
     similar requests for authority in Columbia Gas System, et al., Holding Co.
     Act Rel No. 26498 (Mar. 25, 1996); Cinergy Corp., et al., Holding Co. Act
     Rel. No. 26662 (Feb. 7, 1997); and Consolidated Natural Gas Company, et
     al., Holding Co. Act Rel. No. 26757 (Aug. 27, 1997).

(17) The Commission approved a similar proposal in Columbia Gas System, et al.,
     supra n. 16.


                                       10



          (v)  Customer Goodwill Programs. The offering of customer goodwill or
          retention programs, such as packaged discounts on products for the
          home, travel, and health services, prepaid phone cards or "affinity"
          cards to promote customer goodwill, and programs to help customers
          stay informed and protect their credit rating, driving record, and
          social security number.(18)

          (vi) Outage Insurance. The marketing of "outage" insurance, which
          would enable customers to protect against lost revenues due to power
          interruptions, and surge protection service.(19)

          1.5  Development Activities and Administrative Activities. Non-Utility
Subsidiaries (including but not limited to Intermediate Subsidiaries and Special
Purpose Subsidiaries) request authorization to continue to engage in Development
Activities and Administrative Activities, as such terms are defined under the
1999 Order (see Item 1.2 above). The Applicants request authority to expend up
to $250 million in the aggregate outstanding at any time during the
Authorization Period on all Development Activities. Ameren proposes a "revolving
fund" concept for permitted Development Activities. To the extent a Non-Utility
Subsidiary in respect of which expenditures for Development Activities were made
subsequently becomes an EWG or FUCO or qualifies as an "energy-related company"
under Rule 58, the amount so expended will cease to be considered an expenditure
for Development Activities, but will instead be considered as part of the
"aggregate investment" in such entity pursuant to Rule 53 or 58, as
applicable.(20)

          1.6  Guarantees by Non-Utility Subsidiaries. Non-Utility Subsidiaries
request authorization to provide guarantees or other forms of credit support in
respect of obligations of each other in an aggregate principal amount at any
time outstanding during the Authorization Period not to exceed $300 million, in
addition to any guarantees that are exempt under Rules 45(b) and 52(b), as
applicable, provided that any guaranty or other form of credit support
outstanding on December 31, 2006, shall remain in effect until it expires in
accordance with its terms. Credit support may take the form of direct guaranties
of securities issued by any such direct or indirect subsidiary, stand-by equity
funding commitments, obligations under capital maintenance agreements or under
reimbursement agreements in respect of bank letters of credit, payment
obligations under contracts, or other similar financial instruments or
contractual undertakings. The Non-Utility Subsidiary providing any such
guarantee may charge its associate company a fee for each guarantee provided on
its behalf that is not greater than the cost, if any, of obtaining the liquidity


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

(18) The Commission approved a similar proposal in Columbia Gas System, et al.,
     supra n. 16.

(19) In Columbia Gas System, et al., supra n. 16, the Commission has approved,
     as a part of retail services, warranty programs relating to damage to a
     customer's equipment and appliances, including surge protection.

(20) This type of approval for a revolving fund of permitted investment in
     Development Activities has been approved by the Commission in prior cases.
     See e.g., Exelon Corporation, Holding Co. Act Release No. 27545 (June 27,
     2002) and SCANA Corporation, supra n. 14.


                                       11



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.

     Guarantees provided by Non-Utility Subsidiaries may, in some cases, be
provided to support obligations of other Non-Utility 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 $300 million
limitation 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.

          1.7  Sales of Services and Goods Among Non-Utility Subsidiaries.
Non-Utility Subsidiaries request authorization to provide services or sell goods
to each other at fair market prices determined without regard to cost, and
therefore request an exemption pursuant to Section 13(b) from the cost standard
of Rules 90 and 91 as applicable to such transactions, in any case in which any
of the following circumstances may apply:

          (i) The client company is a FUCO or foreign EWG that derives no part
          of its income, directly or indirectly, from the generation,
          transmission, or distribution of electric energy for sale within the
          United States;

          (ii) The client company is an EWG that sells electricity at
          market-based rates which have been approved by the Federal Energy
          Regulatory Commission ("FERC"), provided that the purchaser thereof is
          not a Utility Subsidiary;

          (iii) The client company is a "qualifying facility" ("QF") within the
          meaning of the Public Utility Regulatory Policies Act of 1978, as
          amended ("PURPA") that sells electricity exclusively (a) at rates
          negotiated at arms'-length to one or more industrial or commercial
          customers purchasing such electricity for their own use and not for
          resale, and/or (ii) to an electric utility company (other than a
          Utility Subsidiary) at the purchaser's "avoided cost" as determined in
          accordance with the regulations under PURPA;

          (iv) The client company is a domestic EWG or QF that sells electricity
          at rates based upon its cost of service, as approved by FERC or any
          state public utility commission having jurisdiction, provided that the
          purchaser thereof is not a Utility Subsidiary; or

          (v) Any other Non-Utility Subsidiary that (1) is partially-owned,
          provided that the ultimate purchaser of such goods or services is not
          a Utility Subsidiary or Ameren Services (or any other entity within
          the Ameren system whose activities and operations are primarily
          related to the provision of goods and services to the Utility
          Subsidiaries, (2) is engaged solely in the business of developing,
          owning, operating and/or providing services or goods to Non-Utility
          Subsidiaries described in paragraphs (i) through (iv) immediately
          above, or (3) does not derive, directly or indirectly, any material


                                       12



          part of its income from sources within the United States and is not a
          public-utility company operating within the United States.(21)

          1.8  Sale of Certain Goods and Services by Non-Utility Subsidiaries
Outside the United States. Non-Utility Subsidiaries request authority to sell
goods and services to customers both within and outside the United States. Such
goods and services include:

          (i) the brokering and marketing of electricity, natural gas and other
          energy commodities;

          (ii) Energy Management Services, as defined in Item 1.2 above;

          (iii) performance contracting services aimed at assisting customers in
          realizing energy and other resource efficiency goals in the areas of
          process control, fuel management, and asset management services
          (including operation and maintenance services) in respect of
          energy-related systems, facilities and equipment located on or
          adjacent to the premises of a customer and used by that customer in
          connection with business activities, including: (i) distribution
          systems and substations, (ii) transmission, storage and peak-shaving
          facilities, (iii) gas supply and/or electrical generation facilities
          (i.e., stand-by generators and self-generation facilities), (iv)
          boilers and chillers, (v) alarm/warning systems, (vi) HVAC, water and
          lighting systems, and (vii) environmental compliance, energy supply
          and building automation systems and controls;

          (iv) Technical Support Services, as defined in Item 1.2 above;

          (v) certain retail services, including the provision of centralized
          bill payment centers for payment of all utility and municipal bills
          and related services; annual inspection, maintenance and replacement
          of energy-related equipment and appliances; service line repair and
          extended warranties with respect to all of the utility- or
          energy-related service lines internal and external to a customer's
          premises; provision of surge protection equipment and services;
          marketing services to associate and nonassociate businesses in the
          form of bill insert; and automated meter-reading services;

          (vi) sale of monitoring and response goods and services, which include
          products used in connection with energy and gas-related activities
          that enhance safety, increase energy/process efficiency; sale of
          energy-related information, as well as repair services, in connection
          with such problems as carbon monoxide leaks and faulty equipment
          wiring; operation of call/dispatch centers on behalf of associate and
          nonassociate companies in connection with the proposed sale of goods
          and services or with activities that Non-Utility Subsidiaries are
          otherwise authorized to engage in under the Act;


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

(21) The Commission has previously authorized substantially similar proposals.
     See Entergy Corporation, et al., Holding Co. Act Release No. 27039
     (June 22, 1999) and NiSource Inc, Holding Co. Act Release No. 27265
     (Nov. 1, 2000).


                                       13



          (vii) sale of energy-peaking services via propane-air or liquefied
          natural gas ("LNG"), which involves the provision of back-up
          electricity or gas supply in periods of high or "peak" energy demand
          using a propane-air mixture or LNG as fuel sources for such back-up
          services; and

          (viii) project development and ownership activities, which involves
          the installation and ownership of gas-fired turbines for on-site
          generation and consumption of electricity.

     In addition, Non-Utility Subsidiaries request authority to provide other
energy-related goods and services that may not be permitted under Rule 58. These
include incidental goods and services closely related to the consumption of
energy and the maintenance of energy consuming property by customers. The need
for these goods and services would arise as a result of, or evolve out of, the
goods and services described above and do not differ materially from those goods
and services. The proposed incidental goods and services would not involve the
manufacture of energy consuming equipment but could be related to, among other
things, the maintenance, financing, sale or installation of such equipment.

     The Applicants request that the Commission (1) authorize electricity and
energy commodity brokering and marketing activities in Canada and reserve
jurisdiction over such activities outside the United States and Canada pending
completion of the record in this proceeding,(22) (2) authorize the proposed sale
of Energy Management Services and Technical Support Services and related
customer financing anywhere outside the United States,(23) and (3) continue to
reserve jurisdiction over sale of the remaining goods and services described
above in subparagraphs (iii) and (v) through (viii) outside the United States,
pending completion of the record.

          1.9  Sale of Agency Services by Ameren Energy and AE Marketing to
Utility Subsidiaries. Ameren Energy requests authorization to continue to act as
agent for AmerenUE in connection with the brokering and marketing of electricity
and other energy commodities by AmerenUE.(24) Such services include negotiation
and administration of power sales agreements with third parties and negotiation
of associated credit support and risk management documents. In accordance with
the 1999 Order, Ameren Energy and AmerenUE have entered into an Agency Agreement
in the form previously approved by the Commission. Under the Agency Agreement,


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

(22) The Commission has previously authorized substantially similar proposals.
     See Southern Energy, Inc., Holding Co. Act Rel. No. 27020 (May 13, 1999)
     (supplemental order amending prior order to permit registered holding
     company subsidiary to engage in power and gas marketing activities in
     Canada and reserving jurisdiction over such activities outside the United
     States and Canada).

(23) See 1999 Order.

(24) Under the 1999 Order, Ameren Energy was also authorized to provide agency
     services to AmerenCIPS. However, AmerenCIPS subsequently sold its
     generating assets to Ameren GenCo, an EWG, and Ameren Energy now provides
     such agency services to Ameren GenCo, as well as to AE Marketing, "at cost"
     pursuant to Rule 87(b)(1).


                                       14



Ameren Energy provides agency and any other incidental services at cost,
determined in accordance with Rules 90 and 91. Ameren Energy is not entitled to
receive any part of the profits from any such transactions and does not receive
any other fee or commission for its services.

     AE Marketing requests authorization to enter into a substantially identical
Agency Agreement with AERG pursuant to which AE Marketing would provide similar
agency services to AERG in connection with brokering and marketing of
electricity produced by AERG. The terms and conditions applicable to Ameren
Energy noted in the previous paragraph will similarly apply to AE Marketing.

          1.10 Investments in Energy-Related Assets. Ameren, indirectly through
one or more Non-Utility Subsidiaries, requests authority to acquire or construct
non-utility energy assets in the United States, including, without limitation,
natural gas production, gathering, processing, storage and transportation
facilities and equipment, liquid oil reserves and storage facilities, and
associated facilities (collectively, "Energy-Related Assets"), that would be
incidental or functionally related to energy marketing, brokering and trading.
Ameren requests authorization to invest up to $400 million at any one time
during the Authorization Period (the "Investment Limitation") in such
Energy-Related Assets or in the equity securities of existing or new companies
substantially all of whose physical properties consist or will consist of such
Energy-Related Assets. Such Energy-Related Assets (or equity securities of
companies owning Energy Assets) may be acquired for cash or in exchange for
common stock or other securities of Ameren or any Non-Utility Subsidiary. If
common stock of Ameren is used as consideration in connection with any such
acquisition, the market value thereof on the date of issuance will be counted
against the proposed Investment Limitation. The stated amount or principal
amount of any other securities issued as consideration in any such transaction
will also be counted against the Investment Limitation. Under no circumstances
will Ameren Energy or any marketing subsidiary acquire, directly or indirectly,
any assets or properties the ownership or operation of which would cause such
companies to be considered an "electric utility company" or "gas utility
company" as defined under the Act.

     As this Commission has recognized in American Electric Power Company, Inc.,
et al., Holding Co. Act Rel. No. 26933 (November 2, 1998) and SEI Holdings,
Inc., Holding Co. Act Rel. No. 26581 (September 26, 1996) and other decisions
(including the 1999 Order), a successful marketer of energy commodities must be
able to control some level of physical assets that are incidental and reasonably
necessary in its day-to-day operations. For example, gas marketers today must be
able to offer their customers a variety of value-added, or "bundled," services,
such as gas storage and processing, that the interstate pipelines offered prior
to FERC Order 636.(25) In order to provide such value-added services, many of
the leading gas marketers have invested in gas production, gathering,
processing, and storage capacity at or near the principal gas producing areas
and hubs and market centers in the U.S. Similarly, in order to compete with both
interstate pipelines and local distribution companies for industrial and


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

(25) See FERC Order 636, FERC Stats. & Regs.Paragraph 30,939, "Pipeline Service
     Obligations and Revisions to Regulations Governing Self-Implementing
     Transportation; and Regulation of Natural Gas Pipelines After Partial
     Wellhead Decontrol," 57 Fed. Reg. 13,270 (April 16, 1992).


                                       15



electric utility sales, marketers must have the flexibility to acquire or
construct such supply facilities. In fact, most energy marketers today own
substantial physical assets of the type described herein.

     The acquisition of production, gathering, processing, and storage capacity
provide energy marketers the opportunity to hedge the price of future supplies
of natural gas against changes in demand brought about due to weather, increased
usage requirements by end use customers, or other volatilities imposed by the
market. Storage and pipeline assets allow energy marketers to "bank" low cost
supplies for use during periods of high volatility or take advantage of
differential price spreads between different markets. Energy marketers with
strong and balanced physical asset portfolios are able to originate tolling or
reverse tolling of gas and electric commodities, whereby the payment is made in
one or the other commodity. The integration of production, gathering, and
storage assets offer energy marketers the opportunity to provide either gas or
electric products and services to energy users, at their discretion, depending
on user requirements and needs. Finally, the physical assets underlying an
energy marketer's balance sheet may provide substantial credit support for the
financial transactions undertaken by the marketer.

     It is the intention of Ameren to add to its existing base of non-utility,
marketing-related, assets as and when market conditions warrant, whether through
acquisitions of specific assets or groups of assets that are offered for sale,
or by acquiring existing companies (for example, other gas marketing companies
which own significant physical assets in the areas of gas production,
processing, storage, and transportation). Ultimately, it is Ameren's objective
to control a substantial portfolio of Energy-Related Assets that would provide
the Ameren system with the flexibility and capacity to compete for sales in all
major markets in the United State and, in the future, possibly Canada.

          1.11 Payment of Dividends Out of Capital and Unearned Surplus. Ameren,
on behalf of its direct or indirect Non-Utility Subsidiaries, requests that such
companies be permitted to pay dividends with respect to the securities of such
companies and/or reacquire their securities that are held by any associate
company, from time to time through the Authorization Period, out of capital and
unearned surplus, to the extent permitted under applicable corporate law,
provided that, without further approval of the Commission, no Non-Utility
Subsidiary will declare or pay any dividend out of capital or unearned surplus
if that Non-Utility Subsidiary derives any material part of its revenues from
sales of goods, services, electricity or natural gas to any of the Utility
Subsidiaries or if, at the time of such declaration or payment, such Non-Utility
Subsidiary has negative retained earnings.(26)

     Ameren anticipates that there will be situations in which Non-Utility
Subsidiaries will have unrestricted cash available for distribution in excess of
any such company's current and retained earnings. In such situations, the
declaration and payment of a dividend would have to be charged, in whole or in
part, to capital or unearned surplus. As an example, if an Intermediate
Subsidiary purchases all of the stock of an EWG or FUCO, and following such
acquisition, the EWG or FUCO incurs non-recourse borrowings some or all of the


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

(26) The Commission has approved substantially similar proposals on numerous
     occasions. In addition to the 1999 Order, see FirstEnergy Corp. et al.,
     Holding Co. Act Release No. 27459 (Oct. 29, 2001) and SCANA Corporation,
     supra n. 14.


                                       16



proceeds of which are distributed to the Intermediate Subsidiary as a reduction
in the amount invested in the EWG or FUCO (i.e., return of capital), the
Intermediate Subsidiary (assuming it has no earnings) could not, without the
Commission's approval, in turn distribute such cash to Ameren.(27)

     Similarly, using the same example, if an Intermediate Subsidiary, following
its acquisition of all of the stock of an EWG or FUCO, were to sell part of that
stock to a third party for cash, the Intermediate Subsidiary would again have
substantial unrestricted cash available for distribution, but (assuming no
profit on the sale of the stock) would not have current earnings and therefore
could not, without the Commission's approval, declare and pay a dividend to
Ameren out of such cash proceeds.

     Further, there may be periods during which unrestricted cash available for
distribution by a Non-Utility Subsidiary exceeds current and retained earnings
due to the difference between accelerated depreciation allowed for tax purposes,
which may generate significant amounts of distributable cash, and depreciation
methods required to be used in determining book income.

     Finally, even under circumstances in which an Intermediate Subsidiary or
Non-Utility Subsidiary has sufficient earnings, and therefore may declare and
pay a dividend to its immediate parent, such immediate parent may have negative
retained earnings, even after receipt of the dividend, due to losses from other
operations. In this instance, cash would be trapped at a subsidiary level where
there is no current need for it.

     Ameren represents that it will not permit any Non-Utility Subsidiary to
declare or pay any dividend out of capital or unearned surplus in contravention
of any law restricting the payment of dividends. Ameren also represents that
Non-Utility Subsidiaries will comply with the terms of any credit agreements and
indentures that restrict the amount and timing of distributions to shareholders.

          1.12 Anticipatory Interest Rate Hedges by Non-Utility Subsidiaries.
Non-Utility Subsidiaries request authorization to enter into interest rate
hedging transactions with respect to anticipated debt offerings ("Anticipatory
Hedges"), subject to certain limitations and restrictions. Such Anticipatory
Hedges would only be entered into with counterparties whose senior debt ratings,
or the senior debt ratings of the parent companies of the counterparties, as
published by Standard and Poor's Ratings Group, are equal to or greater than
BBB, or an equivalent rating from Moody's Investors Service, Fitch Investor
Service or Duff and Phelps.

     Anticipatory Hedges would be utilized to fix 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"), or (iv) some combination of a Forward Sale, Put Options Purchase,
Zero Cost Collar and/or other derivative transactions appropriate for the
Anticipatory Hedges. Anticipatory Hedge transactions may be executed on-exchange
("On-Exchange Trades") with brokers through the opening of futures and/or


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

(27) The same problem would arise where an Intermediate Subsidiary is
     over-capitalized in anticipation of a bid which is ultimately unsuccessful.
     In such a case, Ameren would normally desire a return of some or all of the
     funds invested.


                                       17



options positions traded on the Chicago Board of Trade ("CBOT"), 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. A
Non-Utility Subsidiary will determine the optimal structure of each Anticipatory
Hedge transaction at the time of execution. A Non-Utility Subsidiary may decide
to lock in interest rates and/or limit its exposure to interest rate increases.
All open positions under an Anticipatory Hedge will be closed on or prior to the
date of the new issuance and a Non-Utility Subsidiary will not, at any time,
take possession of the underlying U.S. Treasury securities.

     Each Anticipatory Hedge will qualify for hedge accounting treatment under
the current Financial Accounting Standards Board ("FASB") guidelines in effect
and as determined at the time entered into. Further, the Applicants will comply
with the Statement of Financial Accounting Standards ("SFAS") 133 ("Accounting
for Derivatives 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 FASB.(28)

          1.13 Changes in Capitalization of Non-Utility Subsidiaries; Subsequent
Internal Reorganizations of Non-Utility Subsidiaries. The portion of an
individual Non-Utility Subsidiary's aggregate financing to be effected through
the sale of capital stock during the Authorization Period pursuant to Rule 52
and/or pursuant to an order issued in this proceeding cannot be ascertained at
this time. The proposed sale of capital stock may in some cases exceed the then
authorized capital stock of such Non-Utility Subsidiary. In addition, the
Non-Utility Subsidiary may choose to use capital stock with no par value, or
convert from one form of business organization (e.g., a corporation) to another
(e.g., a limited liability company). Also, a Non-Utility Subsidiary may wish to
engage in a reverse stock split to reduce franchise taxes or for other corporate
purposes. As needed to accommodate such proposed transactions and to provide for
future issuances of securities, the Applicants request authority to change the
terms of any Non-Utility Subsidiary's authorized capitalization by an amount
deemed appropriate by Ameren or other parent company, provided that, if a
Non-Utility Subsidiary is not wholly owned, the consent of all other
shareholders has been obtained for such change. Thus, a Non-Utility Subsidiary
would be able to increase the number of its authorized shares of capital stock,
change the par value of its capital stock, change between par value and no-par
value stock, or convert from one form of business organization to another
without additional Commission approval.(29)

     In addition, to the extent that such transactions are not otherwise exempt
under the Act or Rules thereunder,(30) Ameren requests approval to consolidate,


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

(28) The authority sought for anticipatory interest rate hedging transactions in
     this Application/Declaration is identical to the authorization granted to
     Ameren under the Ameren Financing Order, supra n. 13.

(29) The Commission has previously authorized substantially similar proposals.
     See Conectiv, Inc., Holding Co. Act Release No. 26833 (Feb. 26, 1998); and
     NiSource Inc., Holding Co. Act Release No. 27265 (Nov. 1, 2000).

(30) Sections 12(b), 12(c) and 12(f) of the Act and Rules 43(b), 45(b), 46(a)
     and 58, as applicable, may exempt many of the transactions described in
     this paragraph.


                                       18



sell, transfer or otherwise reorganize all or any part of its direct and
indirect ownership interests in Non-Utility Subsidiaries, as well as investment
interests in entities that are not subsidiary companies. To effect any such
consolidation or other reorganization, Ameren may wish to either contribute the
equity securities of one Non-Utility Subsidiary to another Non-Utility
Subsidiary (including a newly formed Intermediate Subsidiary) or sell (or cause
a Non-Utility Subsidiary to sell) the equity securities or all or part of the
assets of one Non-Utility Subsidiary to another one. Such transactions may also
take the form of a Non-Utility Subsidiary selling or transferring the equity
securities of a subsidiary or all or part of such subsidiary's assets as a
dividend to an Intermediate Subsidiary or to another Non-Utility Subsidiary, and
the acquisition, directly or indirectly, of the equity securities or assets of
such subsidiary, either by purchase or by receipt of a dividend. The purchasing
Non-Utility Subsidiary in any transaction structured as an intrasystem sale of
equity securities or assets may execute and deliver its promissory note
evidencing all or a portion of the consideration given. Ameren may also
liquidate or merge Non-Utility Subsidiaries.(31)

          1.14 Rule 24 Reports. Ameren proposes to continue to file reports
pursuant to Rule 24 on a quarterly basis with respect to the transactions
authorized in this proceeding.(32) It is proposed that such combined report also
be in lieu of any separate notification on Form U-6B-2 that would otherwise be
required of Ameren Development or any subsidiary thereof with respect to exempt
securities issuances. The Rule 24 report shall include:

     (i)  A copy of the balance sheet and income statement for Ameren and its
consolidated subsidiaries.

     (ii) The amount and type of investment in any Special Purpose Subsidiary
during the quarter and a description of the business(es) of any such Special
Purpose Subsidiary.

     (iii) The amounts and form of any guarantee or other form of credit support
provided by any Non-Utility Subsidiary for the benefit of any other direct or
indirect Non-Utility Subsidiary of Ameren.

     (iv) A chart, in the form of Exhibit E hereto, showing, as of the end of
such quarterly period, all associate companies of Ameren that identifies the
type of each Non-Utility Subsidiary (e.g., EWG, FUCO or ETC, Rule 58 Subsidiary,
Intermediate Subsidiary, Financing Subsidiary, Special Purpose Subsidiary) and
Ameren's percentage equity ownership in each such Non-Utility Subsidiary.


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

(31) The Commission has previously authorized substantially similar proposals.
     In addition to the 1999 Order, see Entergy Corporation, et al., Holding Co.
     Act Release No. 27039 (June 22, 1999), and NiSource Inc., supra n. 29.

(32) Rule 58 Subsidiaries will also continue to file quarterly reports on
     Form U-9C-3. In addition, Ameren will provide such information as may be
     required by Form U5S with respect to any EWGs or FUCOs in which it may
     acquire an interest. These reports will be furnished to the Missouri and
     Illinois public service commissions, subject to terms of confidentiality
     that those commissions have granted.


                                       19



     (v)  A narrative description of Development Activities during the quarter,
the dollar amount expended on Development Activities, and the type of potential
investment (e.g., EWG, Rule 58 Subsidiary, etc.) in respect of which such
expenditures were made.

     (vi) A description of non-utility business activities conducted by
Non-Utility Subsidiaries (other than any Exempt Subsidiary) outside the United
States.

     (vii) A description of the type and location of any Energy-Related Assets
(or of the equity securities of any company owning such Energy-Related Assets)
acquired or constructed during the quarter and the aggregate amount of
expenditures thereon during the quarter.

     (viii) The notional amount, identity of counterparty, and principal terms
of any Anticipatory Hedge entered into by a Non-Utility Subsidiary during the
quarter.

     (ix) With respect to any dividends paid by any Non-Utility Subsidiary out
of capital or unearned surplus during the quarter, the date and amount thereof
and the name of the entity to which such dividends were paid.

     (x)  A brief description of any internal reorganization of Non-Utility
Subsidiaries completed during the quarter and the purpose thereof.


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

          The fees, commissions and expenses paid or incurred and to be paid or
incurred in connection with the proposals contained herein are estimated not to
exceed $25,000.


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

          3.1  General. The Applicants believe that the following proposed
transactions are or may be subject to the requirements of the following
provisions of the Act and rules thereunder:


                                       20



               TRANSACTION                      APPLICABLE SECTION OR RULE

Acquisition by Ameren, directly or              Sections 9(a) and 10.
indirectly, of initial securities of
Intermediate Subsidiaries, Special
Purpose Subsidiaries and Financing
Subsidiaries, and Development Activities
and Administrative Activities by
Non-Utility Subsidiaries.

Sale or other transfer by UEDC and CIC          Sections 12(c) or Section 12(f),
of securities and interests in businesses       to the extent not exempt
currently owned by UEDC and CIC or their        pursuant to Rule 43, as
respective subsidiaries, and acquisition        applicable; Sections 9(a)and 10,
thereof by any other Non-Utility                to the extent not exempt
Subsidiary.                                     pursuant to Rule 58 or
                                                Section 34.

Sale of agency services by Ameren Energy        Section 13(b) and Rules 90-91.
to AmerenUE and by AE Marketing to
AERG.

Sale of goods and services among                Section 13(b) and Rules 87 and
Non-Utility Subsidiaries of Ameren              90-91.

Investments in Energy-Related Assets.           Sections 9(a) and 10.

Guarantees by Non-Utility Subsidiaries          Section 6(a), 7 and 12(b) and
of obligations of any other Non-Utility         Rule 45(a) thereunder, unless
Subsidiary                                      exempt pursuant to Rules 45(b)
                                                and/or 52.

Declaration and payment of dividends out        Section 12(c) and Rule 46.
of capital and unearned surplus by
Non-Utility Subsidiaries.

Anticipatory Interest Rate Hedges by            Sections 6(a) and 7.
Non-Utility Subsidiaries

          3.2  Compliance with Rule 54. The transactions proposed herein are
also subject to Rule 54. Rule 54 provides that, in determining whether to
approve the issue or sale of any securities for purposes other than the
acquisition of an EWG or "foreign utility company" ("FUCO") or other
transactions unrelated to EWGs or FUCOs, the Commission shall not consider the
effect of the capitalization or earnings of subsidiaries of a registered holding
company that are EWGs or FUCOs if Rule 53(a), (b) and (c) are satisfied. 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.
These standards are met.


                                       21



     Rule 53(a)(1): Ameren's "aggregate investment" (as defined in
Rule 53(a)(1)) in EWGs as of September 30,2003 was $479,020,230, or
approximately 26.8% of Ameren's "consolidated retained earnings" (also as
defined in Rule 53(a)(1)) for the four quarters ended September 30, 2003
($1,785,326,604). 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 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. generally accepted
accounting principles. 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
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
relating to investments in EWGs and FUCOs and copies of any related Rule 24
certificates, as well as a copy of Ameren's Form U5S, to each of the public
service commissions having jurisdiction over the retail rates of Ameren's
domestic 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 proposed transactions are not subject to the jurisdiction of any
state commission or of any federal commission other than this Commission.


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

          The Commission has published a notice with respect to the filing of
this Application/Declaration (Holding Co. Act Release No. 27767) and no hearing
has been requested. Accordingly, the Applicants respectfully request that the
Commission issue an order in this proceeding approving and authorizing the
Application/Declaration, as amended, and that there be no thirty-day waiting
period between the issuance of the Commission's order and the date on which it
is to become effective. The Applicants hereby waive a recommended decision by a
hearing officer or other responsible officer of the Commission and hereby
consent to the participation of the Division of Investment Management in the
preparation of the Commission's decision and/or order in the proceeding unless
such Division opposes the matters covered hereby.


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

          (a)  Exhibits.
               --------

               A     -     None.

               B     -     None.

               C     -     None.

               D     -     None.


                                       22



               E     -     Organizational Chart of Ameren and
                           Subsidiaries. (Form SE - Required Paper Format)
                           (Previously filed)

               F     -     Opinion of Counsel. (Filed herewith)

               G     -     Form of Federal Register Notice. (Previously
                           filed)

          (b)  Financial Statements.
               --------------------

               FS-1  -     Ameren Consolidated Balance Sheet as of December 31,
                           2002, and Consolidated Statement of Income and
                           Consolidated Statement of Cash Flows for the year
                           ended December 31, 2002 (Incorporated by Reference to
                           Ameren's Annual Report on Form 10-K for the year
                           ended December 31, 2002) (File No. 1-14756).

               FS-2  -     Ameren Consolidated Balance Sheet as of September 30,
                           2003, and Consolidated Statement of Income and
                           Consolidated Statement of Cash Flows for the nine
                           months ended September 30, 2003 (Incorporated by
                           Reference to Ameren's Quarterly Report on Form 10-Q
                           for the period ended September 30, 2003)
                           (File No. 1-14756).


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

          In light of the nature of the proposed transactions, as described in
Item 1 hereof, the Commission's action in this matter will not constitute any
major federal action significantly affecting the quality of the human
environment. No other federal agency has prepared or is preparing an
environmental impact statement with regard to the proposed transactions.


                                       23



                                   SIGNATURES

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



                                Ameren Corporation
                                Ameren Energy, Inc.
                                Ameren Development Company
                                Ameren ERC, Inc.
                                Ameren Energy Resources Company
                                Ameren Energy Marketing Company
                                Ameren Energy Fuels and Services Company
                                Illinois Materials Supply Co.
                                Missouri Central Railroad Company
                                Union Electric Development Corporation
                                AFS Development Company, LLC
                                CIPSCO Investment Company
                                CILCORP Investment Management Inc.
                                CILCORP Ventures Inc.
                                CILCORP Energy Services Inc.
                                QST Enterprises Inc.
                                CILCO Exploration and Development Company
                                CILCO Energy Corporation
                                AmerenEnergy Medina Valley Cogen (No. 2), L.L.C.
                                AmerenEnergy Medina Valley Cogen (No. 4), L.L.C.
                                AmerenEnergy Medina Valley Cogen, L.L.C.
                                AmerenEnergy Medina Valley Operations, L.L.C.

                                By: /s/ Steven R. Sullivan
                                        ------------------
                                Name:   Steven R. Sullivan
                                Title:  Secretary

Dated:  December 18, 2003