; and (2) if feasible, the ways in which individuals with significant disabilities using wheelchairs, including power wheelchairs, can be accommodated with in-cabin wheelchair restraint systems. (b) Report Not later than 1 year after the initiation of the study under subsection (a), the Secretary of Transportation shall submit to the Committee on Transportation and Infrastructure of the House of Representatives and the Committee on Commerce, Science, and Transportation of the Senate a report on the findings of the study. C Small Community Air Service 551. Essential air service authorization Section 41742(a)(2) of title 49, United States Code, is amended by striking $150,000,000 for fiscal year 2011 and all that follows before to carry out and inserting $178,000,000 for fiscal year 2018, $182,000,000 for fiscal year 2019, $185,000,000 for fiscal year 2020, $327,000,000 for fiscal year 2021, $337,000,000 for fiscal year 2022, and $347,000,000 for fiscal year 2023 . 552. Extension of final order establishing mileage adjustment eligibility Section 409(d) of the Vision 100—Century of Aviation Reauthorization Act ( 49 U.S.C. 41731 note) is amended by striking September 30, 2017 and inserting September 30, 2023 . 553. Study on essential air service reform (a) Study (1) In general The Comptroller General of the United States shall conduct a study on the effects of section 6 of the Airport and Airway Extension Act of 2011, Part IV ( Public Law 112–27 ), section 421 of the FAA Modernization and Reform Act of 2012 ( Public Law 112–95 ), and other relevant Federal laws enacted after 2010, including the amendments made by those laws, on the Essential Air Service program. (2) Scope In conducting the study under paragraph (1), the Comptroller General shall analyze, at a minimum— (A) the impact of each relevant Federal law, including the amendments made by each law, on the Essential Air Service program