46 U.S.C. § 55120: Transshipment of imported merchandise intended for immediate exportation

The Secretary of Homeland Security may prescribe regulations for the transshipment and transportation of merchandise that is imported into the United States by sea for immediate exportation to a foreign port by sea, or by a river, the right to ascend or descend which for the purposes of commerce is secured by treaty to the citizens of the United States and the subjects of a foreign power.