Iowa Code Title IX. Local Government [Chs. 331-420] § 331.201. Board membership--qualifications--term

1. The board shall consist of three members unless the membership is increased to five as provided in section 331.203.

2. A supervisor must be a registered voter of the county or supervisor district of the county which the supervisor represents.

3. The office of supervisor is an elective office except that if a vacancy occurs on the board, a successor may be appointed to the unexpired term as provided in section 69.14A.

4. The term of office of a supervisor is four years unless a change in the supervisor district representation plan or in the number of supervisors on the board requires the election of one or two supervisors for an initial term of two years.