Immediately upon filing the declaration of incorporation mentioned in section 7, in the office of the secretary of state, as in that section directed, the council shall proceed to divide the newly incorporated city into wards. If such city contains a population of less than 5,000 persons, they shall divide it into 3 wards; if it contains a population of 5,000 and upwards, it may be divided into 4 wards; and a greater number of wards may be established upon the basis of population as provided in section 2, chapter 3 of this act. The division shall be so made as to make the territory and population of the wards as nearly equal as may be.
MCL 81.10