s 46 Power of planning authorities to vary planning permission.
After section 31 of the 1972 Act there shall be inserted the following section— Power of planning authorities to vary planning permission. (31A) Notwithstanding any other provision of this Part of this Act, a planning authority may, at the request of the grantee or of a person acting with his consent, vary any planning permission granted by them, if it appears to them that the variation sought is not material.