amount appropriated under this heading, up to $6,000,000 shall be used for providing matching funds to qualified commercial entities seeking to demonstrate or validate technologies that the Federal Aviation Administration considers essential to the safe integration of unmanned aircraft systems (UAS) in the National Airspace System at Federal Aviation Administration designated UAS test sites: Provided further , That not later than 60 days after the date of enactment of this Act, the Administrator of the Federal Aviation Administration shall identify essential integration technologies that could be demonstrated or validated at test sites designated in accordance with the preceding proviso. Facilities and equipment (airport and airway trust fund) For necessary expenses, not otherwise provided for, for acquisition, establishment, technical support services, improvement by contract or purchase, and hire of national airspace systems and experimental facilities and equipment, as authorized under part A of subtitle VII of title 49, United States Code, including initial acquisition of necessary sites by lease or grant