available for such purpose. 13. Management and disposal of property (a) Establishment of a single property disposal agency The Secretary shall establish a new Field Activity to act as the executive agent for the management and disposal of real property made excess to the needs of the Department in carrying out the actions described in section 12. The staff of this Field Activity may consist of persons detailed to the field activity by the Army Corps of Engineers, Naval Facilities Engineering Command, the Air Force Installation and Mission Support Center, and other Federal departments or agencies to assist in carrying out the Field Activities duties under this Act. (b) Management and disposal of property (1) The Administrator of General Services shall delegate to the Secretary of Defense, with respect to excess and surplus real property, facilities, and personal property located at a military installation closed or realigned under this Act— (A) the authority of the Administrator to utilize excess property under subchapter II of chapter 5 of title 40, United States Code