19 C.F.R. § 122.157 Documents required for clearance.
Title 19 - Customs Duties
As a condition precedent to clearance, the aircraft commander shall present to Customs: (a) The documents required by Subpart H of this part; and (b) A validated license issued by the Department of Commerce, as provided for in 15 CFR 371.19 or a license issued by the Department of State, as provided in 22 CFR part 123.
Title 19: Customs Duties
PART 122—AIR COMMERCE REGULATIONS
Subpart O—Flights to and From Cuba
§ 122.157 Documents required for clearance.
