13.—(1) No part of any electrical transmission station may be commenced until a detailed surface water drainage scheme based on sustainable drainage principles and an assessment of the hydrological and hydrogeological context of the electrical transmission station has been submitted to and approved by the local planning authority, in consultation with the drainage board concerned within the meaning of section 23 of the Land Drainage Act 1991.
(2) Construction of the electrical transmission station must be carried out in accordance with the approved scheme.