Any individual, whether in private or ex-officio capacity, may be appointed to serve on such commission, and the majority of the members thereof shall be individuals who do not hold elective public office. The boards of county commissioners of two or more counties may arrange or provide for a joint or common commission, and for the purposes of this subdivision any such joint or common zoning commission shall be deemed the zoning commission of each of such counties. The board of county commissioners shall provide for reimbursement of the members of the zoning commission for actual expenses incurred, and shall provide for the filling of vacancies in the membership of such commission, and for the removal of a member for non-performance of duty or misconduct.
16 P.S. § 5221