The authority for public airport donations is 49 U.S.C. 47151 . 49 U.S.C. 47151 authorizes executive agencies to give priority consideration to requests from a public airport (as defined in 49 U.S.C. 47102 ) for the donation of surplus property if the Department of Transportation (DOT) considers the property appropriate for airport purposes and GSA approves the donation.
41 C.F.R. §102-37.520