19 C.F.R. § 122.28 Private aircraft taken abroad by U.S. residents.
Title 19 - Customs Duties
An aircraft belonging to a resident of the U.S. which is taken to a foreign area for non-commercial purposes and then returned to the U.S. by the resident shall be admitted under the conditions and procedures set forth in §148.32 of this chapter. Repairs made abroad, and accessories purchased abroad shall be included in the baggage declaration as required by §148.32(c), and may be subject to entry and payment of duty as provided in §148.32.
Title 19: Customs Duties
PART 122—AIR COMMERCE REGULATIONS
Subpart C—Private Aircraft
§ 122.28 Private aircraft taken abroad by U.S. residents.