((a)) ** .—** The Administrator of General Services, subject to chapters 33 and 51 and subchapter III of chapter 53 of title 5, may appoint and fix the compensation of personnel necessary to carry out chapters 1, 3, and 5 of this title and division C (except sections 3302, 3501(b), 3509, 3906, 4710, and 4711) of subtitle I of title 41.

((b)) ** .—** The Administrator may procure the temporary or intermittent services of experts or consultants under to the extent the Administrator finds necessary to carry out chapters 1, 3, and 5 of this title and division C (except sections 3302, 3501(b), 3509, 3906, 4710, and 4711) of subtitle I of title 41.

((c)) ** .—** Notwithstanding or any other law, in carrying out functions under this subtitle the Administrator may use the services of personnel (including armed services personnel) from an executive agency other than the General Services Administration with the consent of the head of the agency.

((d)) ** .—** The Administrator, in the Administrator’s discretion, may detail field personnel of the Administration to the District of Columbia for temporary duty for a period of not more than 30 days in any one case. Subsistence or similar expenses may not be allowed for an employee on temporary duty in the District of Columbia under this paragraph.