You need to know that:
(a) Goods transported entirely or partly by water between U.S. points, either directly or via a foreign port, must travel in U.S. flag vessels that have a coastwise endorsement;
(b) There are exceptions and limits for the U.S. Island territories and possessions in the Atlantic and Pacific Oceans (see Sec. 102-117.155); and
(c) The Secretary of the Treasury is empowered to impose monetary penalties against agencies that violate the coastwise laws. [65 FR 60061, Oct. 6, 2000, as amended at 75 FR 51394, Aug. 20, 2010]