15.—(1) The Secretary of State may request a Contracting State to survey a United Kingdom ship and, if the Contracting State is satisfied that the ship complies with the requirements of the Convention, to issue, or authorise the issue of, a Sewage Certificate in respect of that ship.
(2) Where a Sewage Certificate is issued pursuant to paragraph (1)—
(a)the Secretary of State is to be treated as the Certifying Authority in relation to it; and
(b)any reference in these Regulations to the Certifying Authority who issued the Certificate is to be treated as a reference to the Secretary of State.