4. In regulation 4 of the principal Regulations (enforcement and execution of regulations), for paragraph (2) substitute–
“(2) Any two local authorities may agree that one of them shall undertake the enforcement and execution of the whole or specified provisions of these Regulations in the district of the other, provided that they first obtain the approval of the Scottish Ministers to the terms of the agreement.
(3) The district in which a provision of these Regulations is enforced and executed under an agreement made under paragraph (2) is deemed to be the district of the authority which enforces and executes it.
(4) Where an agreement under paragraph (2) enables a local authority to enforce and execute the provisions relating to ship sanitation certificates in the district of another local authority, an authorised officer of the local authority has authority to issue or amend a ship sanitation certificate in the district of the other local authority.
(5) A local authority must–
(a)ensure that no ship sanitation certificate is issued without prior inspection by an authorised officer with appropriate expertise;
(b)ensure that any control measures required under regulations 19A(1)(a)(ii)(aa), 19B(3)(a)(i) and (4)(a)(i) are carried out by or under the supervision of an authorised officer with appropriate expertise.”.