Power of Corporation to regulate the manufacture, preparation and sale of food and drink---The Corporation may, and if required by the Government shall, by below--

(a) prohibit the manufacture, shall or preparation of any exposure for sale, of any specified article of food or drink, in any place or premises not licensed by the Corporation; (b) regulate the hours of manner or transport of any specified articles of food or drink within the City and prescribe the route by which such articles shall be carried; (c) prohibit the sale of milk, butter, ghee, curd, meat, game, fish and poultry by persons not licensed by the Corporation; (d) prohibit the import by persons not licensed by the Corporation of milk, cream, butter, ghee, curd, meat, game, fish and poultry within the City for sale; (e) provide for the grant and withdrawal of license and the levying of fees thereof under this section; Provided that no person shall be punishable for the breach of any byelaw made under clause (a) by reason of the continuance of such manufacture, preparation or exposure for sale, or sale in any place or upon any premises which are at the time of the making of such byelaws used for such purpose until he has received from the Corporation six month's notice in writing to discontinue such manufacture, preparation or exposure for sale.