21.—(1) With respect to any Requirement which requires the authorised project to be carried out in accordance with details approved by the relevant planning authority, the approved details include any amendments that may subsequently be approved in writing by the relevant planning authority to the extent that the authority may lawfully do so.
(2) Any approved details in any Requirement, including amendment or variation from the approved details under paragraph (1), may not be authorised by the relevant planning authority except where it has been demonstrated to the satisfaction of that relevant planning authority that the subject-matter of the approval sought is unlikely to give rise to any materially new or materially different environmental effects in comparison with the authorised project as identified and assessed in the environmental statement.
Commencement Information
I1Sch. 3 para. 21 in force at 15.9.2016, see art. 1