12.—(1) In the event that, at some future date, the authorised development, or part of it, is to be decommissioned, a written scheme of decommissioning must be submitted to the relevant planning authority for its approval in consultation with the relevant highway authority, at least six months prior to any decommissioning works.
(2) The approved scheme must be implemented as approved as part of the decommissioning of the authorised development or relevant part of it.
(3) This requirement does not apply to the part of the authorised development and associated development described in Schedule 1 (authorised development) which relates to the dismantling and removal of existing infrastructure or apparatus.
(4) The written scheme of decommissioning submitted under sub-paragraph (1) must include an environmental assessment undertaken in accordance with the laws and regulations applicable at the time it is submitted to the relevant planning authority.