It’s much more restrictive than that, which is why there are basically no carriers that meet its requirements. It’s just not financially feasible. From Wikipedi

It’s much more restrictive than that, which is why there are basically no carriers that meet its requirements. It’s just not financially feasible. From Wikipedia: It requires that all goods transported by water between U.S. ports be carried on ships that have been constructed in the United States and that fly the U.S. flag, are owned by U.S. citizens, and are crewed by U.S. citizens and U.S. permanent residents.