13.—(1) Before applying for a storage permit, a licence holder shall draw up a proposed provisional post-closure plan that is—
(a)based on best practice; and
(b)in accordance with Annex II to the Directive.
(2) Before granting a storage permit, the authority shall—
(a)approve that proposed plan; or
(b)require the licence holder to make such modifications to it as the authority (after consulting the licence holder) considers necessary,
and the provisional post-closure plan is the plan so approved or modified.
(3) The authority may—
(a)approve a proposed post-closure plan submitted to it for approval in accordance with the provisions in the licence included by virtue of regulation 6 and paragraph 2(1) of Schedule 1; or
(b)require the operator to make such modifications to it as the authority (after consulting the operator) considers necessary,
and the post-closure plan is the plan so approved or modified.
(4) Where the authority is deemed to be the operator pursuant to regulation 12(5), the post-closure plan is the provisional post-closure plan with such modifications as the authority considers necessary.