The planning commission consists of six regular members and one alternate member. The term of a member of the planning commission is 3 years. The terms of the members of the planning commission shall be staggered. At the end of a term, an appointed member continues to serve until a successor is appointed and qualifies. An ex officio member serves a term concurrent with the member’s term of office. A member who is appointed after a term has begun serves only for the rest of the term and until a successor is appointed and qualifies.