08938 12/11/2007 11:42 FAX 0018/099 KIRKLAND & ELLIS I Lr R. Alexander Acosta December 11.2007 Page I5 obligation to undcdakc discussion with the Slate Attomey's Office Ia custom caswpiiiiitim with these procedures. which compliance will be necessary to satisfy the United States' intero.t, pursuant to the Pe