5.—(1) Subject to paragraphs (2) to (5), these Regulations apply to—
(a)a United Kingdom NLS ship wherever it may be; and
(b)any other NLS ship while it is within United Kingdom waters.
(2) Subject to paragraph (5), regulation 20(1) and (2) apply to a ship which—
(a)is not a United Kingdom ship;
(b)is engaged in voyages to ports or offshore installations under the jurisdiction of a Contracting State other than the United Kingdom; and
(c)is—
(i)in a port in the United Kingdom; or
(ii)at an offshore installation in the United Kingdom or controlled waters, other than a floating platform which is in transit.
(3) Subject to paragraph (5), regulation 24 applies to the discharge into the sea from any ship which has caused, or is likely to cause, pollution within United Kingdom waters.
(4) Subject to paragraph (5), regulation 26 applies to any ship which, having been enabled to proceed contrary to the requirements of that regulation, has caused, or is likely to cause, pollution within United Kingdom waters.
(5) These Regulations do not apply to any—
(a)warship;
(b)naval auxiliary; or
(c)other ship owned or operated by a State and used for the time being on government, non-commercial service.