33 U.S.C. § 1604 : US Code - Section 1604: Vessels not subject to International Regulations

Search 33 U.S.C. § 1604 : US Code - Section 1604: Vessels not subject to International Regulations

(a) The International Regulations do not apply to vessels while
in the waters of the United States shoreward of the navigational
demarcation lines dividing the high seas from harbors, rivers, and
other inland waters of the United States.
(b) Whenever a vessel subject to the jurisdiction of the United
States is in the territorial waters of a foreign state the
International Regulations shall be applicable to, and shall be
complied with by, that vessel to the extent that the laws and
regulations of the foreign state are not in conflict therewith.