EXHIBIT 31 UBS PAINEWEBBER INC. RULE 10b5-1 SALES PLAN This Sales Plan dated April 12, 2001 (the "Sales Plan") is entered into between Frank A. Wojtek ("Seller") and UBS PaineWebber Inc. ("UBS PaineWebber"), acting as agent, for the purpose of...Wojtek Frank A • April 4th, 2002 • Crude petroleum & natural gas • New York
Company FiledApril 4th, 2002 Industry Jurisdiction