19 C.F.R. § 122.51 Aircraft of domestic origin registered in the U.S.
Title 19 - Customs Duties
After Customs inspection of the aircraft, passengers, baggage and merchandise at the entry airport, commercial aircraft of domestic origin registered in the U.S. may be allowed to proceed to other airports in the U.S. without permit.
Title 19: Customs Duties
PART 122—AIR COMMERCE REGULATIONS
Subpart F—International Traffic Permit
§ 122.51 Aircraft of domestic origin registered in the U.S.