11-2-3. Term of office of appointed commission members--Removal for cause--Ex officio members. The term of each of the appointed members of the county planning commission shall be for three to five years as the board of county commissioners may provide. However, when the planning commission is first appointed, the lengths of the terms shall be varied so that no more than one-third of the terms shall expire in the same year. Any appointed member of the county planning commission may be removed for cause, after hearing prior to the expiration of the term by a majority vote of the elected members of the board of county commissioners. Administrative officials of the county may be appointed as ex officio members of the commission.