46 U.S.C. § 10701: Application

(a) Except as otherwise specifically provided, this chapter applies to a vessel on a voyage between—(1) a port of the United States and a port in a foreign country (except a port in Canada, Mexico, and the West Indies); and (2) a port of the United States on the Atlantic Ocean and a port of the United States on the Pacific Ocean. (b) This chapter does not apply to a vessel on which a seaman by custom or agreement is entitled to share in the profit or result of a voyage. (c) This chapter does not apply to a foreign vessel.