The board of county commissioners of each county within the human service zone shall appoint the appointed members of the human service zone board based upon fitness to serve as members by reason of character, experience, and training without regard to political affiliation. Appointed members of the human service zone board must consist of local elected officials and other key community partners, including at least one member of the legislative assembly. If a human service zone consists of two or more counties, each county must be represented on the human service zone board by only one county commissioner of that county. If a human service zone consists of a single county, the county must be represented on the human service zone board by no more than two county commissioners of that county and the human service zone board must have at least five appointed members. Appointed members shall elect a vice presiding officer and appoint a secretary, and other officers as the human service zone board determines necessary. The human service zone director shall serve as presiding officer of the human service zone board as a nonappointed member.