Except in counties with a consolidated city-county (metropolitan or unification) form of government, the county legislative body is made up of not less than nine nor more than 25 members, elected from districts. No more than three members may be elected from any one district. T.C.A. § 5-5-102. Districts must be reapportioned at least every 10 years, and commissioners must represent substantially equal populations based on the latest federal census. T.C.A. § 5-1-111. Members are elected by the voters in their district for four-year terms and until their successors are elected and qualified. T.C.A. § 5-5-102. The county legislative body determines by resolution whether members in multimember districts are elected at large within the district with the two or three persons receiving the greatest number of votes being elected, or whether candidates must run for designated seats, usually designated A and B, also C in three-member districts. T.C.A. § 5-5-102(h). Members are elected in the August general elections coinciding with the election of the governor and take office the following September 1 after being qualified to hold office.