; and (2) in clause (ii), by striking and (g) and inserting (g), and (i) . (c) Preservation of existing within perimeter service Nothing in this section, or the amendments made by this section, shall be construed as authorizing the conversion of a within-perimeter exemption or slot at Ronald Reagan Washington National Airport that is in effect on the date of enactment of the FAA Reauthorization Act of 2024 to serve an airport located beyond the perimeter described in section 49109 of title 49, United States Code. B Accessibility 731. Extension of the advisory committee on the air travel needs of passengers with disabilities Section 439(g) of the FAA Reauthorization Act of 2018 ( 49 U.S.C. 41705 note) is amended by striking March 8, 2024 and inserting September 30, 2028 . 732. Modernization and improvements to aircraft evacuation (a) Study (1) In general Not later than 1 year after the date of enactment of this section, the Administrator shall conduct a study on improvements to the safety and efficiency of evacuation standards for manufacturers and carriers of transport category airplanes, as described in parts 25 and 121 of title 14, Code of Federal Regulations. (2) Contents (A) Requirements The study required by paragraph (1) shall include— (i) a prospective risk analysis, as well as an evaluation of relevant past incidents with respect to evacuation safety and evacuation standards; (ii) an assessment of the evacuation testing procedures described in section 25.803 of such title 14, as well as recommendations for how to revise such testing procedures to ensure that the testing procedures assess, in a safe manner, the ability of passengers with disabilities, including those who use wheelchairs or other mobility assistive devices, to safely and efficiently evacuate an aircraft