- Where it appears to the Commissioner that any premises are, or are intended to be, used as a market, railway station, dock, wharf or other place of public resort, or as a place in which persons exceeding twenty in number are employed in any manufacture, trade or business or as workmen or labourers, the Commissioner may, by written notice, require the owner or occupier of the said premises to construct a sufficient number of water-closets or latrines or privies and urinals for the separate use of each sex.