16 Pa.C.S. § 15904

A county acquiring land for an airport may enter into agreements for the use of all or a part of the land, for adequate consideration, after due public notice to a person desiring to use the same for the purposes of taking off or landing an airplane, for other aviation purposes or for any nonaviation purpose, on terms and subject to conditions and regulations. In counties of the second class A, agreements for nonaviation purposes shall be for terms of less than 50 years and shall only involve land designated in the county's airport master plan not needed for airport purposes within the term of the lease. A county may enter into a contract in the form of a lease providing for the use of airport land or any part thereof by the Federal Government for air mail delivery or other aviation purposes upon nominal rental or without consideration.