; 16 U.S.C. 1338a ) is amended— (1) by striking In administering this Act and inserting (a) In general .—In administering this Act ; (2) by striking helicopters or, for the purpose of transporting captured animals, motor vehicles and inserting motor vehicles for the purpose of transporting captured animals ; (3) by striking fixed-wing aircraft, or helicopters, or to and inserting or ; and (4) by adding at the end the following: (b) Prohibition on certain uses of aircraft In administering this Act, the Secretary may not use or contract for the use of helicopters or fixed-wing aircraft for the purposes of rounding up or gathering wild free-roaming horses and burros. . 4. GAO Report Not later than 1 year after the date of the enactment of this Act, the Comptroller General shall submit, to the Committee on Natural Resources of the House of Representatives and the Committee on Energy and Natural Resources of the Senate, a report that describes— (1) humane alternatives to the use of helicopters and fixed-wing aircraft in managing wild free-roaming horse and burro populations; (2) job creation opportunities presented by the use of such humane alternatives; and (3) the effects of aircraft, including unmanned aircraft systems, on wild free-roaming horse and burro populations.