52 STAT.] 75TH CONG. , 3D SESS.-CH. 601-JUNE 23, 1938 to be observed by each such class or group, as the Authority finds necessary in the public interest. Exemptions (b) (1) The Authority, from time to time and to the extent neces- sary, may (except as provided in paragraph (2) of this subsection) exempt from the requirements of this title or any provision thereof, or any rule, regulation, term, condition, or limitation prescribed there- under, any air carrier or class of air carriers, if it finds that the enforcement of this title or such provision, or such rule, regulation, term, condition, or limitation is or would be an undue burden on such air carrier or class of air carriers by reason of the limited extent of, or unusual circumstances affecting, the operations of such air carrier or class of air carriers and is not in the public interest. (2) The Authority shall not exempt any air carrier from any pro- vision of subsection (1) of section 401 of this title, except that (A) any air carrier not engaged in scheduled air transportation, and (B), to the extent that the operations of such air carrier are conducted during daylight hours, any air carrier engaged in scheduled air transporta- tion, may be exempted from the provisions of paragraphs (1) and (2) of such subsection if the Authority finds, after notice and hearing, that, by reason of the limited extent of, or unusual circumstances affecting, the operations of any such air carrier, the enforcement of such paragraphs is or would be such an undue burden on such air carrier as to obstruct its development and prevent it from beginning or continuing operations, and that the exemption of such air carrier from such paragraphs would not adversely affect the public interest: Provided,That nothing in this subsection shall be deemed to authorize the Authority to exempt any air carrier from any require- ment of this title, or any provision thereof, or any rule, regulation, term, condition, or limitation prescribed thereunder which provides for maximum flying hours for pilots or copilots. TITLE V-NATIONALITY AND OWNERSHIP OF AIRCRAFT REGISTRATION OF AIRCRAFT NATIONALITY Registration Required SEC. 501. (a) It shall be unlawful for any person to operate or navigate any aircraft eligible for registration if such aircraft is not registered by its owner as provided in this section, or (except as pro- vided in section 6 of the Air Commerce Act of 1926, as amended) to operate or navigate within the United States any aircraft not eligible for registration: Provided That aircraft of the national defense forces of the United States may be operated and navigated without being so registered if such aircraft are identified, by the agency having jurisdic- tion over them, in a manner satisfactory to the Authority. The Authority may, by regulation, permit the operation and navigation of aircraft without registration by the owner for such reasonable periods after transfer of ownership thereof as the Authority may prescribe. Eligibility for Registration (b) An aircraft shall be eligible for registration if, but only if- (1) It is owned by a citizen of the United States and is not regis- tered under the laws of any foreign country; or (2) It is an aircraft of the Federal Government, or of a State, Territory, or possession of the United States, or the District of Columbia, or of a political subdivision thereof. 1005 Exemptions. Exceptions. Ante, p. 990. Proviso. Maximum flying hours for pilots or copilots. Title V-National- ity and Ownership of Aircraft. Registration of air. craft nationality. Registration re- quired. 44 Stat. 72. 49 U.S.C. §176. Proviso. Aircraft of national defense forces. Operation without registration after transfer; limitation. Eligibility for regis- tration.
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