Duration and expiry of permission to erect a Building

(1) A permission to erect a building granted under Section 46 shall, unless it is renewed on an application made to the Corporation for this only for two years after the date on which it is granted, unless the work of erection has been commenced within that period but in any case shall not continue for a period longer than three years from the said date unless it is so renewed. (2) Any person who erects a building or continues the work of erection of a building, when the permission granted therefor has expired, shall be deemed to erect such building or to continue such work without sanction.