AGREEMENT TO FILE SCHEDULE 13D JOINTLY (as required by Item 7 of Schedule 13D)Agreement to File Schedule 13d Jointly • January 31st, 2006 • Usg Corp • Concrete, gypsum & plaster products
The undersigned persons hereby agree that reports on Schedule 13D, and any amendments thereto, may be filed in a single statement on behalf of all such persons, and further, each such person designates Marc D. Hamburg as its agent and attorney-in-fact for the purpose of executing any and all such reports required to be made by it with the Securities and Exchange Commission.
