EX-1 3 jd3-19ex_1.txt EXHIBIT 1 AGREEMENT This will confirm the agreement by and among all the undersigned that the Schedule 13D filed on or about this date with respect to the beneficial ownership of the undersigned of shares of the common stock of Plains Resources Inc. is being filed on behalf of each of the entities named below. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. Dated: March 19, 2004 LEUCADIA NATIONAL CORPORATION By: /s/ Joseph A. Orlando ---------------------------------- Name: Joseph A. Orlando Title: Vice President and Chief Financial Officer PERSHING SQUARE, L.P. By: PERSHING SQUARE GP, LLC By: /s/ William Ackman ---------------------------------- Name: William Ackman Title: Managing Member PERSHING SQUARE GP, LLC By: /s/ William Ackman ---------------------------------- Name: William Ackman Title: Managing Member By: /s/ William Ackman ----------------------------------- Name: William Ackman