; (B) shall hold the appropriate category and class rating for the authorized aircraft; (C) shall hold 3 experimental aircraft authorizations in aircraft of the same category and class rating for the authorization sought; and (D) may become qualified in additional experimental aircraft by completing aircraft-specific ground and flight training. (b) Rule of construction Nothing in this section may be construed to disallow an individual from being given both an authorization described in paragraph (1)(A) and an authorization described in paragraph (1)(B). (c) Failure to comply (1) In general If the Administrator fails to implement subsection (a) within the time period prescribed in such subsection, the Administrator shall brief the appropriate committees of Congress on the status of the implementation of such subsection on a monthly basis until the implementation is complete. (2) No delegation The Administrator may not delegate the briefing described in paragraph (1). 807. Response to letter of investigation Section 2(b) of the Pilot’s Bill of Rights ( 49 U.S.C. 44703 note) is amended by adding at the end the following: (6) Response to letter of investigation (A) In general If an individual decides to respond to a Letter of Investigation described in paragraph (2)(B), such individual may respond not later than 30 days after receipt of such Letter, including providing written comments on the incident to the investigating office. (B) Construction Nothing in this paragraph shall be construed to diminish the authority of the Administrator (as of the day before the date of enactment of the FAA Reauthorization Act of 2024 ) to take emergency action relating to an airman certificate. . 808. ADS–B out equipage study