Section 212(1)(a) in The Gujarat Provincial Municipal Corporations Act, 1949
(a)require the owner of such building to show cause within such period as is specified in such notice by a statement in writing subscribed by him or by an agent duly authorised by him in that behalf and addressed to the Commissioner, why such building or any part thereof, which is within the regular line of the street shall not be pulled down and the land within the said line acquired by the Commissioner; or