Section 396(1) in The Mumbai Municipal Corporation Act, 1888
(1)The Commissioner may at any time, by day or by night, without notice, enter into or upon, and inspect or examine, any premises used or likely to be used for the purposes mentioned in section 394 or 394-A, and upon any premises in which a furnace is employed for the purpose of any trade, process or operation, and into any bakehouse, and take samples if need be by breaking open the container or call upon any person who may be keeping or suffering or allowing the keeping of any article or carrying on or allowing to carry on any trade, process or operation to give samples of the article kept or products of the trade, process or operation, in order to satisfy himself as to whether any provision of this Act or any regulation or by-law or notification made or issued thereunder or any condition of a licence granted under this Act has been or is being contravened, and as to whether any nuisance is created, or is likely to be created upon such premises.