Pub. L. 91-171, tit. VI, sec. 631

Sec. 631. Of the funds made available by this Act for the services of the Military Airlift Command, $109,000,000 shall be available only for procurement of commercial transportation service from carriers participating in the civil reserve air, fleet program; and the Secretary of Defense shall utilize the services of such carriers which qualify as small businesses to the fullest extent found practicable: Provided, That the Secretary of Defense shall specify in such procurement, performance characteristics for aircraft to be used based upon modern aircraft operated by the civil air fleet.