Section 303(2) in The Mumbai Municipal Corporation Act, 1888
(2)But if, within thirty days after the receipt by the Commissioner of any notice under section 302 or of the plans, sections, description, scheme or further information, if any, called for under section 302A, the disapproval by the Commissioner with regard to any of the matters aforesaid specified in such notice shall not be communicated to the person who gave the same, the proposals of the said person shall be deemed to have been approved by the Commissioner.]