Section 167(1) in The Gujarat Provincial Municipal Corporations Act, 1949
(1)Where the Commissioner is of opinion that any group or block of premises, any part of which is situated within one hundred feet of a municipal drain, or other place legally set apart for the discharge of drainage already existing or about to be constructed, may be drained more economically or advantageously in combination than separately, the Commissioner may cause such group or block of premises to be drained by such method as appears to the Commissioner to be best suited therefor, and the expenses incurred by the Commissioner in so doing shall be paid by the owner of such premises in such proportions as the Commissioner thinks fit.