15 U.S.C. § 9044
The Secretary of Transportation is authorized to require, to the extent reasonable and practicable, an air carrier receiving loans and loan guarantees under section 9042 of this title to maintain scheduled air transportation service as the Secretary of Transportation deems necessary to ensure services to any point served by that carrier before March 1, 2020. When considering whether to exercise the authority granted by this section, the Secretary of Transportation shall take into consideration the air transportation needs of small and remote communities and the need to maintain well-functioning health care and pharmaceutical supply chains, including for medical devices and supplies. The authority under this section, including any requirement issued by the Secretary under this section, shall terminate on March 1, 2022.
15 U.S.C. § 9044