Regulations to determine the fitness of a building.

For the purposes of this Act, the Corporation may, from time to time, frame regulations not inconsistent with this Act for determining the

standards of fitness of buildings for human habitation ; provided that, where in pursuance of a notice

under sub-section (1) of section 378-A any building has been rendered fit for human habitation by the execution of works and alterations to the satisfaction of the Commissioner, such building during a period of ten years from the date of completion of such works and alterations shall not be deemed to be unfit for human habitation by reason only of not conforming with any regulations made subsequently to such date affecting the structure of such building.