(A) The governing body of any county is authorized to create a commission subject to the provisions of this section. The commission consists of six members, all of whom must be residents of the county, appointed as follows:

1. (1) The governing body of the county must appoint three members of the commission.

2. (2) The municipalities in the county must appoint three members, who must be residents of incorporated municipalities within the county, and who are selected according to the following mechanism:

   1. (a) The total population of all incorporated municipalities within the county, as determined by the most recent United States census, must be divided by three, the result being an apportionate average.
   2. (b) The respective population of each municipality in the county must be divided by the apportionate average to determine an appointive index.
   3. (c) Each municipality in the county appoints a number of members to the commission equal to the whole number indicated by their appointive index. However, no single municipality may appoint more than two members to the commission; unless there is only one municipality in the county, and in such case the municipality is entitled to three appointments to the commission.
   4. (d) When less than three members are selected to the commission in accordance with the prescribed appointive index method, the remaining member or members must be selected in a joint meeting of the commission appointees of the municipalities in the county. The member or members must be chosen from among the residents of the municipalities in the county that before this time have not provided a representative for the commission.
   5. (e) In the event no municipality is entitled to appoint a member to the commission pursuant to the formula in subitem (c) of this subsection, the municipality with the highest appointive index must be deemed to have an appointive index of one.