151.51—Applicability.
(1)
Each ship that is of United States registry or nationality, or one operated under the authority of the United States, including recreational vessels defined in 46 U.S.C. 2101(25) and uninspected vessels defined in 46 U.S.C. 2101(43), wherever located; and
(2)
Each ship, other than a ship referred to in paragraph (a)(1) of this section, while in the navigable waters or the Exclusive Economic Zone of the United States.
(1)
A warship, naval auxiliary, or other ship owned or operated by the United States when engaged in noncommercial service; or