18.—(1) Within 12 months of the date that the undertaker decides to decommission any part of the authorised development, the undertaker must submit to the relevant planning authority for its approval, after consultation with the Environment Agency, a decommissioning environmental management plan for that part.
(2) No decommissioning works must be carried out until the relevant planning authority has approved the plan submitted under sub-paragraph (1) in relation to such works.
(3) The plan submitted and approved must include details of—
(a)the buildings to be demolished;
(b)the means of removal of the materials resulting from the decommissioning works;
(c)the phasing of the demolition and removal works;
(d)any restoration works to restore the land to a condition agreed with the relevant planning authority;
(e)the phasing of any restoration works; and
(f)a timetable for the implementation of the scheme.
(4) The measures set out in the plan submitted under paragraph (1) must be consistent with the principles informing the measures that are set out in the register of environmental actions and commitments.
(5) The plan must be implemented and maintained as approved for the duration of the decommissioning of the authorised development.