33 CFR § 151.30 - Applicability.
(a) Except as provided in paragraph (b) of this section, §§ 151.30 through 151.49 apply to each ship that—
(1) Is operated under the authority of the United States and engages in international voyages;
(2) Is operated under the authority of the United States and is certificated for ocean service;
(3) Is operated under the authority of the United States and is certificated for coastwise service beyond three nautical miles from land;
(4) Is operated under the authority of the United States and operates at any time seaward of the outermost boundary of the territorial sea of the United States as defined in § 2.22 of this chapter; or
(5) Is operated under the authority of a country other than the United States while in the navigable waters of the United States, or while at a port or terminal under the jurisdiction of the United States.
(b) Sections 151.30 through 151.49 do not apply to—
(1) A tank barge whose certificate is endorsed by the Coast Guard for a limited short protected coastwise route if the barge is constructed and certificated primarily for service on an inland route;
(2) A warship, naval auxiliary, or other ship owned or operated by a country when engaged in noncommercial service;
(3) A Canadian or U.S. ship being operated exclusively on the Great Lakes of North America or their connecting and tributary waters;
(4) A Canadian or U.S. ship being operated exclusively on the internal waters of the United States and Canada; or
(5) Any other ship specifically excluded by MARPOL 73/78.