230.220.  Commission membership, districts — members, election of — compensation and mileage, funds used for — vacancies, how filled. — 1.  In each county adopting it, the county highway commission established by sections 230.200 to 230.260 shall be composed of the three commissioners of the county commission and one person elected from the unincorporated area of each of the two county commission districts.  Except that the presiding commissioner and one of the associate commissioners by process of election may reside in the same township, not more than one member of the county highway commission shall be a resident of the same township of the county.  The county commission shall designate one county commission district as district A and the other as district B.  The member of the county highway commission first elected from district A shall serve a term of two years.  The member first elected from district B shall serve a term of four years.  Upon the expiration of the term of each such member, his successors shall be elected for a term of four years.  The commissioners of the county commission shall serve as members of the county highway commission during their term as county commissioners.

  2.  The elected members of the county highway commission shall be nominated at the primary election and elected at the general election next following the adoption of the proposition for the alternative county highway commission by the voters of the county.  Candidates shall file and the election shall be conducted in the same manner as for the nomination and election of candidates for county office.  Within thirty days after the adoption of an alternative county highway commission by the voters of any county as provided in sections 230.200 to 230.260, the governor shall appoint a county highway commissioner from each district from which a member will be elected at the next following general election.  The commissioners so appointed shall hold their office until their successors are elected at the following general election.  Appointments shall be made by naming one member from each of the two political parties casting the highest number of votes in the preceding general election.

  3.  Members of the county highway commission who are not also members of the county's governing body shall receive an attendance fee in an amount per meeting as set by the county's governing body, not to exceed one hundred dollars, and a mileage allowance for miles actually and necessarily traveled in the performance of their duties in the same amount per mile received by the members of the county's governing body to be paid out of the road and bridge fund of the county.

  4.  If a vacancy occurs among the elected members of the county highway commission, the members of the county highway commission shall select a successor who shall serve until the next regular election.