; and (C) methods and opportunities for community outreach, education, and engagement. (b) Report Not later than 3 years after the date of enactment of this Act, the Administrator shall submit to the covered committees of Congress and the Committee on Transportation and Infrastructure of the House of Representatives a report on the results of the study conducted under subsection (a) and recommendations, if appropriate, to facilitate the safe operation and integration of high-speed aircraft into the national airspace system. (c) Definitions In this section: (1) High-speed aircraft The term high-speed aircraft means an aircraft operating at speeds in excess of Mach 1, including supersonic and hypersonic aircraft. (2) Hypersonic The term hypersonic means flights operating at speeds that exceed Mach 5. (3) Supersonic The term supersonic means flights operating at speeds in excess of Mach 1 but less than Mach 5. 1011. Operating high-speed flights in high altitude Class E airspace (a) Research Not later than 1 year after the date of enactment of this Act, the Administrator, in consultation with the Administrator of NASA and any other relevant stakeholders the Administrator determines appropriate, including industry and academia, shall undertake research to identify, to the maximum extent practicable, the minimum altitude above the upper boundary of Class A airspace, at or above which flights operating with speeds above Mach 1 generate sonic booms that do not produce appreciable sonic boom overpressures that reach the surface under prevailing atmospheric conditions. (b) Hypersonic defined In this section, the term hypersonic means a flight operating at speeds that exceed Mach 5. 1012. Electric propulsion aircraft operations study (a) In general Not later than 120 days after the date of enactment of this Act, the Comptroller General shall initiate a study assessing the safe and scalable operation and integration of electric aircraft into the national airspace system. (b) Contents In conducting the study required under