The Senate prohibition only applies to rolling stock (rail cars and buses), not any other kind of procurement.
ABA voices support for equitable airport access
In a joint letter with the National Limousine Association; Near Airport Parking Industry Trade Assoc.; and the Taxicab, Limousine, Paratransit Assoc., the American Bus Assoc. urged Senate chairmen and ranking members to provide an even playing field with motorcoach access to airports.