The Chief Municipal Executive Officer/ Municipal Executive Officer may alteration of existing

with a view to promoting convenience, safety, privacy of the public or the buildings. occupier, or sanitation or to securing conformity with the provisions of this Act and the rules and the regulations made thereunder by order in writing require the owner of any existing building to make such alteration therein and within such period as may be specified in the order : Provided that before making any such order, the Chief Municipal Executive Officer/ Municipal Executive Officer shall afford a reasonable opportunity to the owner to show cause why such order should not be made.