19 U.S.C. § 1463 : US Code - Section 1463: Sealed vessels and vehicles

Search 19 U.S.C. § 1463 : US Code - Section 1463: Sealed vessels and vehicles

To avoid unnecessary inspection of merchandise imported from a
contiguous country at the first port of arrival, the master of the
vessel or the person in charge of the vehicle in which such
merchandise is imported may apply to the customs officer of the
United States stationed in the place from which such merchandise is
shipped, and such officer may seal such vessel or vehicle. Any
vessel or vehicle so sealed may proceed with such merchandise to
the port of destination under such regulations as the Secretary of
the Treasury may prescribe.