1. There shall be established a board of trustees of not less than nine members appointed by the county or participating counties in a service area. The regional advisory council, as defined in section 632.040, or any other interested party may nominate individuals for membership on the board. The governing body of the county or counties shall appoint the members to such board of trustees within one year of January 1, 1991. No more than one-third of the members shall represent public or private entities involved in the provision of services as provided by sections 205.975 to 205.990. At least one-third of the members shall represent consumers of psychiatric services or the families of such consumers. Employees of public or private entities which are recipients of funds pursuant to sections 205.975 to 205.990 are prohibited from serving on this board of trustees.

2. The composition of the board of trustees shall be representative of the residents of the county or participating counties within a service area, taking into consideration their employment, age, sex, and place of residence and other demographic characteristics of the area. At least one member shall be a licensed physician and at least one-half of the members of such body shall be individuals who are not providers of health care.

3. For multicounty service areas, each participating county shall have at least one representative on the board of trustees. The remaining members shall be appointed in proportion to the populations of the participating counties within the service area.

4. The terms of office of the members of the board of trustees shall be three years except that of the first appointments, the terms of the members shall be staggered as follows:

(1) In multicounty service areas, one member from each county shall be appointed to a three-year term. Counties which have two or more representatives shall appoint one member to a two-year term. Counties having more than two representatives shall appoint one-third of its members to one-year terms, one-third to two-year terms, and one-third to three-year terms.

(2) In service areas entirely within a county, one-third of the members shall be appointed for one year, one-third for two years, and one-third for three years.