In this chapter, the term “short sea transportation” means the carriage by a documented vessel of cargo—
that is—
(A) contained in intermodal cargo containers and loaded by crane on the vessel;
(B) loaded on the vessel by means of wheeled technology;
(C) shipped in discrete units or packages that are handled individually, palletized, or unitized for purposes of transportation; or
(D) freight vehicles carried aboard commuter ferry boats; and
that is—
(A) loaded at a port in the United States and unloaded either at another port in the United States or at a port in Canada located in the Great Lakes Saint Lawrence Seaway System; or
(B) loaded at a port in Canada located in the Great Lakes Saint Lawrence Seaway System and unloaded at a port in the United States.
(Added Pub. L. 110–140, title XI, § 1121(a), Dec. 19, 2007, 121 Stat. 1761; amended Pub. L. 112–213, title IV, § 405(b), Dec. 20, 2012, 126 Stat. 1571; Pub. L. 114–92, div. C, title XXXV, § 3508, Nov. 25, 2015, 129 Stat. 1223.)