Sch 7A para 13 General condition of planning permission
(1) Every planning permission granted for the development of land in England shall be deemed to have been granted subject to the condition in sub-paragraph (2). (2) The condition is that the development may not be begun unless— (a) a biodiversity gain plan has been submitted to the planning authority (see paragraph 14), and (b) the planning authority has approved the plan (see paragraph 15).