(1) A regional plan, master plan or new town development plan approved under section 28 may, at any time, be varied or revoked by a subsequent regional plan, master plan or new town development plan, as the case may be, prepared and approved under this Act.
(2)(a) Once in every ten years after the date on which the regional plan for an area comes into operation, the regional planning authority may, and if so directed by the Government shall, after carrying out such fresh surveys as may be considered necessary and in consultation with the Director, review the regional plan and make such modifications in such plan wherever necessary and submit the modified regional plan for the approval of the Government.
(b) Once in every five years after the date on which the master plan for an area comes into operation, the local planning authority may, and if so directed by the Government shall, after carrying out such fresh surveys as may be considered necessary and in consultation with the regional planning authority and the local authorities concerned, review the master plan and make such modifications in such plan wherever necessary and submit the modified master plan for the approval of the Government.
(3) The provisions of section 36, 28 and 30 with such modifications as may be necessary shall apply to such modified regional plan or the master plan, as the case may be.
(4) The Government may, at any time by notification in the Tamil Nadu Government Gazette, vary or revoke the regional plan, a master plan or a new town development plan, as the case may be, prepared and approved under this Act.