; and (5) by striking subsections (f) and (h) and redesignating subsection (g) (as amended by paragraph (4)) as subsection (f). 563. GAO study and report on the alternate essential air service pilot program (a) Study The Comptroller General shall study the effectiveness of the alternate essential air service pilot program established under section 41745 of title 49, United States Code, (in this section referred to as the Alternate EAS program ), including challenges, if any, that have impeded robust community participation in the Alternate EAS program. (b) Contents The study required under subsection (a) shall include an assessment of potential changes to the Alternate EAS program and the basic essential air service programs under subchapter II of chapter 417 of title 49, United States Code, including changes in which Governors of States or territories containing essential air service communities would be given block grants in lieu of essential air service subsidies. (c) Briefing Not later than 3 years after the date of enactment of this Act, the Comptroller General shall submit to the appropriate committees of Congress a report on the study required under subsection (a), including any recommendations for legislation and administrative action as the Comptroller General determines appropriate. 564. Essential air service in parts of Alaska Not later than September 1, 2024, the Secretary, in consultation with the appropriate State authority of Alaska, shall review all domestic points in the State of Alaska that were deleted from carrier certificates between July 1, 1968, and October 24, 1978, and that were not subsequently determined to be an eligible place prior to January 1, 1982, as a result of being unpopulated at that time due to destruction during the 1964 earthquake and its resultant tidal wave, to determine whether such points have been resettled or relocated and should be designated as an eligible place entitled to receive a determination of the level of essential air service supported, if necessary, with