Section 202(2)(b) in The Gujarat Municipalities Act, 1963
(b)If any such work is begun or completed without such permission, the Chief Officer may either-(i)by written notice require the owner or other person who has done such work to fill up or demolish such work in such manner as the Chief Officer shall prescribe; or(ii)grant written permission to retain such work; but such permission shall not exempt such owner from proceedings for contravening the provisions of clause (a) of this sub-section.