19.—(1) In accordance with the ISPS Code M1, the Secretary of State shall decide, and thereafter notify companies and owners of port facility security plans in writing, of the changes or amendments to the relevant approved ship security plan or port facility security plan that must first be submitted to him for approval before they are implemented in respect of those ships and port facilities.

(2) The changes or amendments referred to in paragraph (1) shall not be implemented by the companies or owners of port facility security plans without first obtaining the approval of the Secretary of State.