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...Sales Contracts • April 4th, 2002 • Wojtek Frank A • Crude petroleum & natural gas • New York
