The Mayor, with the advice and consent of the Township Council, shall appoint all regular and alternate members of the Commission and shall designate at the time of appointment the regular members by class and the alternate members as "Alternate No. 1" and "Alternate No. 2." The terms of the regular members first appointed under this chapter shall be as follows: One-year terms for a Class A member and a Class C member; two-year terms for a Class B member and two Class C members; three-year terms for a Class C member and a member of either Class A or Class B; and four-year terms for a Class C member and a member of either Class A or Class B. The terms of the alternate members first appointed under this chapter shall be one year for Alternate No. 1 and two years for Alternate No. 2. Thereafter, the term of a regular member shall be four years, and the term of an alternate member shall be two years. Notwithstanding any other provision herein, the term of any member common to the Commission and the Township Planning Board shall be for the member's term of membership on the Planning Board, and the term of any member common to the Commission and the Township Zoning Board of Adjustment shall be for the member's term of membership on the Zoning Board of Adjustment.