Section 7(2)(a) in The Gujarat Municipalities Act, 1963
(a)the State Government shall, by notification in the Official Gazette, determine the number of wards into which the municipal borough shall be divided, the number of councillors to be elected to the municipality and the number of seats to be reserved in favour of the Scheduled Castes, the Scheduled Tribes, the backward classes and women as provided in subsection (3) of section 6.