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
February 4, 2004 CIBC World Markets Corp. As Representative of the Several Underwriters c/o CIBC World Markets Corp. CIBC World Markets Tower World Financial Center 200 Liberty Street New York, New York 10281 Re: Public Offering of Common Stock of...Lock-Up Agreement • April 5th, 2004 • Wojtek Frank A • Crude petroleum & natural gas
As Representative of the Several Underwriters c/o CIBC World Markets Corp. CIBC World Markets Tower World Financial Center 200 Liberty Street New York, New York 10281
EXHIBIT 32 AMENDMENT TO RULE 10b5-1 TRADING PLAN The Sales Plan dated April 12, 2001 (the "Sales Plan") entered into between Frank Wojtek ("Seller") and UBS PaineWebber Inc. ("UBS PaineWebber"), acting as agent, for the purpose of establishing a...Rule 10b5-1 Trading Plan • July 25th, 2002 • Wojtek Frank A • Crude petroleum & natural gas
