Necessary amounts may be appropriated to allow the head of a department, agency, or instrumentality of the Government to acquire space at a public airport (as defined in section
47102 of title
49) when the head decides the space is necessary to carry out inspections, clearance, collection of taxes or duties, or a similar responsibility of the head, related to transporting passengers or property in air commerce. The head must consult with the Secretary of Transportation before making a decision on space.