; (2) that is operated less than 400 feet above the ground and in Class G airspace; (3) that is operated in a manner that does not interfere with and gives way to any manned aircraft; and (4) with respect to which, in any case in which the unmanned aircraft system is flown within five miles of an airport, the operator of the aircraft provides the airport operator and the airport air traffic control tower (when an air traffic facility is located at the airport) with prior notice of such operation, including by establishing a mutually agreed upon operating procedure in cases with respect to which such unmanned aircraft system is flown from a permanent location within five miles of an airport. 904. Authorization of appropriations (a) Federal Aviation Administration research and development funding There are authorized to be appropriated to the Administrator of the Federal Aviation Administration to carry out section 901— (1) $20,000,000 for fiscal year 2024; (2) $21,000,000 for fiscal year 2025; (3) $22,050,000 for fiscal year 2026; (4) $23,152,500 for fiscal year 2027; and (5) $24,310,125 for fiscal year 2028. (b) University unmanned aircraft systems center funding There are authorized to be appropriated to the Administrator of the Federal Aviation Administration to carry out section 902— (1) $100,000,000 for fiscal year 2024; (2) $105,000,000 for fiscal year 2025; (3) $110,250,000 for fiscal year 2026; (4) $115,762,500 for fiscal year 2027; and (5) $121,550,625 for fiscal year 2028. X Limitation 1001. Limitation (a) In general Except as otherwise provided in this section, none of the funds authorized to be appropriated by this Act may be used for the purchase, acquisition, or operation of advanced air mobility and unmanned aircraft systems— (1) produced or assembled in, or containing components produced or assembled in, a foreign country of concern