11.—(1) Subject to paragraph (2), any land within the Order limits which is used temporarily for construction is to be reinstated to its former condition, or such condition as the relevant planning authority may approve, within twelve months of completion of construction of the stage of authorised development for which it was required, or such further time as may be approved by the relevant planning authority.
(2) The requirement to reinstate the land to its former condition is subject to the provisions of articles 36 (temporary use of land by National Grid), 37 (temporary use of land by NPG), 38 (temporary use of land by NGN) and article 39 (temporary use of land for maintaining the authorised development).