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)