Section 297(1)(b) in The Mumbai Municipal Corporation Act, 1888
(b)from time to time, but subject in each case to his receiving the authority of the corporation in that behalf, prescribe a fresh line in substitution for any line so prescribed, or for any part thereof provided that such authority shall not be accorded-(i)unless, at least one month before the meeting of the corporation at which the matter is decided, public notice of the proposal has been given by the Commissioner by advertisement in local newspapers as well as in the [Official Gazette] [The words 'Official Gazette' were substituted for the words 'Bombay Government Gazette' by the Adaptation of Indian Laws Order In Council.], and special notice thereof, signed by the Commissioner, has also been put up in the street or part of the street for which such fresh line is proposed to be prescribed, and(ii)until the corporation have considered all objections to the said proposal made in writing and delivered at the office of the municipal secretary not less than three clear days before the day of such meeting.