(A) A local planning commission serving not more than two political jurisdictions may not have less than five nor more than twelve members. A local planning commission serving three or more political jurisdictions shall have a membership not greater than four times the number of jurisdictions it serves. In the case of a joint city-county planning commission the membership must be proportional to the population inside and outside the corporate limits of municipalities.

(B) No member of a planning commission may hold an elected public office in the municipality or county from which appointed. Members of the commission first to serve must be appointed for staggered terms as described in the agreement of organization and shall serve until their successors are appointed and qualified. The compensation of the members, if any, must be determined by the governing authority or authorities creating the commission. A vacancy in the membership of a planning commission must be filled for the unexpired term in the same manner as the original appointment. The governing authority or authorities creating the commission may remove any member of the commission for cause.

(C) In the appointment of planning commission members the appointing authority shall consider their professional expertise, knowledge of the community, and concern for the future welfare of the total community and its citizens. Members shall represent a broad cross section of the interests and concerns within the jurisdiction.