(1) If a service provider's data retention implementation plan is in force, it may be amended only if:
(a) the service provider applies to a Communications Access Coordinator for approval of the amendment, and a Communications Access Coordinator approves the amendment; or
(b) a Communications Access Coordinator makes a request to the service provider for the amendment to be made, and the service provider agrees to the amendment.
(2) Section 187F applies in relation to approval of the amendment under paragraph (1)(a) as if the application for approval of the amendment were an application under section 187E for approval of a data retention implementation plan.
(3) An amendment of a data retention implementation plan:
(a) comes into force when:
(i) if paragraph (1)(a) applies--a Communications Access Coordinator notifies the service provider of the approval of the amendment; or
(ii) if paragraph (1)(b) applies--the service provider notifies a Communications Access Coordinator of the service provider's agreement to the amendment; but
(b) does not effect when the plan ceases to be in force under paragraph 187H(1)(b).