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.
(Pub. L. 109–304, § 8(c), Oct. 6, 2006, 120 Stat. 1641.)