Section 178(4) in The Bombay Provincial Municipal Corporations Act, 1949
(4)Where any water-closet or privy accommodation is provided or set up by the Commissioner under sub-section (1) and the expenses incurred by the Commissioner in doing so are paid by, or recovered from, the owner in full, such water-closet or privy accommodation shall belong to the owner of the premises and the owner shall be responsible for the expenses of maintaining it in good repairs and efficient condition.