(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 the Communications Access Co - ordinator for approval of the amendment, and the Co - ordinator approves the amendment; or
(b) the Co - ordinator 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--the Co - ordinator notifies the service provider of the approval of the amendment; or
(ii) if paragraph (1)(b) applies--the service provider notifies the Co - ordinator 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).