8-K

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                    FORM 8-K

                                 CURRENT REPORT

                       Pursuant to Section 13 or 15(d) of
                       the Securities Exchange Act of 1934


Date of earliest event reported:    December 16, 1999
Date of report:                     December 17, 1999

Commission             Registrant, State of Incorporation, I.R.S. Employer
File Number              Address and Telephone Number      Identification No.

1-1443                 Central and South West Corporation   51-0007707
                       (A Delaware Corporation)
                       1616 Woodall Rodgers Freeway
                       Dallas, Texas 75202-1234
                       (214) 777-1000

0-346                  Central Power and Light Company      74-0550600
                       (A Texas Corporation)
                       539 North Carancahua Street
                       Corpus Christi, Texas 78401-2802
                       (512) 881-5300

0-343                  Public Service Company of Oklahoma   73-0410895
                       (An Oklahoma Corporation)
                       212 East 6th Street
                       Tulsa, Oklahoma 74119-1212
                       (918) 599-2000

1-3146                 Southwestern Electric Power Company  72-0323455
                       (A Delaware Corporation)
                       428 Travis Street
                       Shreveport, Louisiana 71156-0001
                       (318) 673-3000

0-340                  West Texas Utilities Company         75-0646790
                       (A Texas Corporation)
                       301 Cypress Street
                       Abilene, Texas 79601-5820
                       (915) 674-7000





GLOSSARY OF TERMS
The following abbreviations or acronyms used in this text are defined below:

Abbreviation or Acronym    Definition
AEP........................American Electric Power Company, Inc., Columbus, Ohio
AEP Merger.................Proposed merger between AEP and CSW where CSW would
                           become a wholly-owned subsidiary of AEP
Amendment No. 1............Amendment to Merger Agreement as of December 31, 1999
CSW........................Central and South West Corporation, Dallas, Texas
CSW System.................CSW and its subsidiaries
Exchange Act...............Securities Exchange Act of 1934, as amended
Merger Agreement...........Agreement and Plan of Merger, dated as of December
                           21, 1997, between AEP and CSW











FORWARD-LOOKING INFORMATION
This report made by CSW and certain of its subsidiaries contains forward-looking
statements  within the meaning of Section 21E of the Exchange Act.  Although CSW
and each of its  subsidiaries  believe  that  their  expectations  are  based on
reasonable  assumptions,  any such  statements may be influenced by factors that
could cause actual  outcomes and results to be materially  different  from those
projected.   Important  factors  that  could  cause  actual  results  to  differ
materially from those in the  forward-looking  statements  include,  but are not
limited to:

- -        the impact of general economic changes  in  the  United  States  and in
         countries in which CSW either  currently  has made or in the future may
         make investments,
- -        the  impact  of  the  proposed  AEP  Merger  including  any  regulatory
         conditions imposed on the merger or the inability to consummate the AEP
         Merger,
- -        increased competition  and  the  restructuring of  the electric utility
         industry in the United States,
- -        federal and state regulatory  developments and changes in law which may
         have a substantial adverse impact on the value of CSW System generating
         and other assets,
- -        timing and adequacy of rate relief,
- -        adverse changes in electric load and customer growth,
- -        climatic changes or unexpected changes in weather patterns,
- -        changing  fuel  prices,  generating  plant  and  distribution  facility
         performance,
- -        decommissioning costs associated with nuclear generating  facilities,
- -        costs associated with any year 2000 computer related failure(s) within
         the  CSW  System,  with  the  electric  grid  or  with supplier(s) that
         adversely affect the CSW System and
- -        risks associated with hedging and other risk management techniques.








ITEM 5.  OTHER EVENTS

      AEP Merger
      On December 16, 1999, AEP and CSW issued a news release related to the AEP
Merger, a copy of which is attached as an exhibit hereto and incorporated herein
by  reference.  AEP and CSW have  entered  into  Amendment  No. 1 to the  Merger
Agreement,  a copy of which is  attached as an exhibit  hereto and  incorporated
herein by reference.


ITEM 7.  FINANCIAL STATEMENTS AND EXHIBITS

(c)  Exhibits.

Exhibit  99.1 - News  release  dated  December  16,  1999  issued by AEP and CSW
related to the AEP Merger.

Exhibit  10.23.1 - Amendment No. 1 to Agreement and Plan of Merger,  dated as of
December 31, 1999, by and among American  Electric  Power  Company,  Inc., a New
York Corporation,  Augusta Acquisition Corporation, a Delaware Corporation and a
wholly-owned  subsidiary  of AEP,  and  Central  and South West  Corporation,  a
Delaware Corporation.








SIGNATURES

      Pursuant to the  requirements  of the Securities  Exchange Act of 1934, as
amended,  each registrant has duly caused this report to be signed on its behalf
by the undersigned hereunto duly authorized.


                        CENTRAL AND SOUTH WEST CORPORATION

Date:  December 17, 1999

                        By:  /s/ Lawrence B. Connors
                                 Lawrence B. Connors
                            Controller and Chief Accounting Officer
                                 (Principal Accounting Officer)



                        CENTRAL POWER AND LIGHT COMPANY
                        PUBLIC SERVICE COMPANY OF OKLAHOMA
                        SOUTHWESTERN ELECTRIC POWER COMPANY
                        WEST TEXAS UTILITIES COMPANY


Date:  December 17, 1999

                        By:  /s/ R. Russell Davis
                                 R. Russell Davis
                             Controller and Chief Accounting Officer
                                 (Principal Accounting Officer)

EX-99.1

                                                                    Exhibit 99.1
AEP, CSW Extend Merger Agreement

(Note: This is a press release issued jointly by AEP and CSW on Dec. 16.)

                         AEP, CSW AMEND MERGER AGREEMENT
                   TO EXTEND TERM FOR AN ADDITIONAL SIX MONTHS

Columbus, Ohio, and Dallas, Texas (Dec. 16, 1999) -- American Electric Power and
Central and South West Corp. have mutually agreed to amend the agreement for the
pending  merger of the two  companies  to  extend  its  term.  This  will  allow
additional  time to satisfy the closing  conditions  contained in the agreement.
This amendment to the merger  agreement,  approved by the boards of directors of
each  company,  requires that AEP and CSW gain final  approvals  before June 30,
2000. The original merger agreement listed a Dec. 31, 1999 deadline.

The merger has already received  approval from state  regulatory  commissions in
Arkansas,  Louisiana,  Oklahoma and Texas,  the four states within CSW's service
territory. In addition, the Nuclear Regulatory Commission has approved a license
transfer application for the transfer of control of CSW subsidiary Central Power
and Light's South Texas Nuclear Plant.

The merger  requires  additional  approvals  by the  Federal  Energy  Regulatory
Commission (FERC), the Securities and Exchange Commission (SEC) and clearance by
the Department of Justice under the Hart-Scott-Rodino Antitrust Improvements Act
of 1976. The  administrative law judge who presided over the FERC merger hearing
filed an initial  decision with the commission on Nov. 23 that found the AEP-CSW
merger  to be in the  public  interest.  The FERC  indicated  it will act on the
merger no later than  February  or March  2000.  The SEC review  will follow the
FERC's action.

Central and South West Corp. is a global,  diversified  public  utility  holding
company based in Dallas. CSW owns four electric operating  subsidiaries  serving
1.7 million  customers in Texas,  Oklahoma,  Louisiana and Arkansas;  a regional
electricity company in the United Kingdom; other international energy operations
and   non-utility   subsidiaries   involved   in   energy-related   investments,
telecommunications, energy efficiency and financial transactions.

AEP,  a  global  energy   company,   is  one  of  the  United  States'   largest
investor-owned  utilities,  providing energy to 3 million  customers in Indiana,
Kentucky,  Michigan,  Ohio,  Tennessee,  Virginia  and  West  Virginia.  AEP has
holdings in the United States, the United Kingdom,  China and Australia.  Wholly
owned  subsidiaries  provide power  engineering,  energy  consulting  and energy
management services around the world. The company is based in Columbus, Ohio.

EX-10.23.1

                                                                 Exhibit 10.23.1

                                 AMENDMENT No. 1

                                       TO


AGREEMENT AND PLAN OF MERGER





            This  Amendment  No. 1, dated as of December  31,  1999,  amends the
Agreement  and Plan of  Merger as of  December  21,  1997 by and among  American
Electric  Power  Company,   Inc.,  a  New  York  corporation  ("AEP"),   Augusta
Acquisition Corporation, a Delaware corporation and a wholly owned subsidiary of
AEP ("Augusta"),  and Central and South West Corporation, a Delaware corporation
(the  "Company").  All Orders  necessary for the consummation of the Merger have
not been obtained.

            The Board of  Directors  of the  Company,  the Board of Directors of
AEP, and the Board of Directors of Augusta have  determined that the Termination
Date of December 31, 1999 provided in Paragraph  9.1(f) of the Merger  Agreement
should be extended upon the terms and conditions set forth herein.

            NOW THEREFORE,  in consideration of the foregoing and the respective
agreements  set forth in this  Amendment  No.  l, the  parties  hereto  agree as
follows:

             1.   Paragraph  9.1(f) of the Merger Agreement is hereby amended so
                  that, as amended, it shall read in its entirety as follows.

                        "(f.)  Termination  Date  By either  AEP or the Company,
                        by written notice to the other, if the Merger shall  not
                        have  been   consummated  on  or  before   June 30, 2000
                        (`Termination Date')."

             2.   The Merger shall be  consummated  pursuant to Article 2 of the
                  Merger Agreement provided that on or before the Effective Date
                  all closing conditions set forth in the Merger Agreement shall
                  be satisfied or, if permitted by the Merger Agreement,  waived
                  in a writing given  subsequent  to the date of this  Amendment
                  No. 1.






             3.   This  Amendment  No. 1 is not and  shall not be deemed to be a
                  waiver of any rights or a release of any obligations of any of
                  the parties to the Merger Agreement whether based upon events,
                  facts or conditions  occurring or existing before or after the
                  date hereof.

             4.   Capitalized   terms  shall  have  the  same  meaning  in  this
                  Amendment No. 1 as in the Merger Agreement.

            IN WITNESS  WHEREOF,  each of the  parties  hereto  has caused  this
Amendment  No.  1 to be  executed  as of the  date  first  written  above by the
respective duly authorized officers thereunto duly authorized.

AMERICAN ELECTRIC POWER COMPANY, INC.




By:/s/ E.L. Draper, Jr.
   Name:  E.L. Draper, Jr.
   Title:



AUGUSTA ACQUISITION CORPORATION




By:/s/ E.L. Draper, Jr.
   Name:  E.L. Draper, Jr.
   Title




CENTRAL AND SOUTH WEST CORPORATION




By:/s/ E.R. Brooks
   Name:  E.R. Brooks
   Title: