(a) Each department, agency, or instrumentality of the United States in control of the maintenance, operation, and protection of Federal property shall take all steps necessary to assure that, wherever feasible, in light of appropriate space and potential patronage, one or more vending facilities for operation by blind licensees shall be located on all Federal property Provided that the location or operation of such facility or facilities would not adversely affect the interests of the United States. Blind persons licensed by State licensing agencies shall be given priority in the operation of vending facilities on any Federal property.

(b) Any limitation on the location or operation of a vending facility for blind vendors by a department, agency or instrumentality of the United States based on a finding that such location or operation or type of location or operation would adversely affect the interests of the United States shall be fully justified in writing to the Secretary who shall determine whether such limitation is warranted. A determination made by the Secretary concerning such limitation shall be binding on any department, agency, or instrumentality of the United States affected by such determination. The Secretary shall publish such determination in the Federal Register along with supporting documents directly relating to the determination.

(c) Priority in the operation of vending facilities in areas administered by the National Park Service or the National Aeronautics and Space Administration shall be given to blind vendors. Priority in the awarding of contracts for the operation of concessions in such areas when such concessions provide accommodations, facilities, and services of a scope or of a character not generally available in vending facilities operated by blind vendors shall be given in accordance with the provisions of the Concession Policy Act (Pub. L. 98-249, 16 U.S.C. 1) or the National Aeronautics and Space Act of 1958, as amended (Pub. L. 85-568, 42 U.S.C. 2473). The provisions of this part shall not apply when all accommodations, facilities, or services in such areas are operated by a single responsible concessioner.