A.
There is hereby established pursuant to N.J.S.A. 40:55D-1 et seq. (c. 291, P.L. 1975) in the Borough of Alpha, Warren County, New Jersey, a Planning Board of nine members, consisting of the following four classes:
(1)
Class I: the Mayor or the Mayor's designee.
(2)
Class II: one of the officials of the municipality other than a member of the governing body, to be appointed by the Mayor; provided, however, that if there is an Environmental Commission, the member of the Environmental Commission who is also a member of the Planning Board, as required by N.J.S.A. 40:56A-1, shall be deemed to be the Class II Planning Board member if there are both a member of the Historic Preservation Commission and a member of the Board of Education among the Class IV members.
(3)
Class III: a member of the governing body, to be appointed by it.
(4)
Class IV: six other citizens of the municipality, to be appointed by the Mayor. The members of Class IV shall hold no other municipal office, except that one may be a member of the Board of Education. A member of the Environmental Commission who is also a member of the Planning Board, as required by N.J.S.A. 40:56A-1, shall be a Class IV Planning Board member unless there are among the Class IV members or alternate members of the Planning Board both a member of the Historic Preservation Commission and a member of the Board of Education, in which case the member of the Environmental Commission shall be deemed to be the Class II member of the Planning Board. For the purpose of this section, membership on a municipal board or commission whose function is advisory in nature, and the establishment of which is discretionary and not required by statute, shall not be considered the holding of municipal office.
B.
There shall be two alternate members in Class IV. Alternate members of Class IV shall serve for terms of two years; provided, however, that in the event that two alternate members of Class IV are appointed, the initial terms of such members shall be one and two years, respectively. Such alternate members shall be designated by the Chairman as "Alternate No. 1" and "Alternate No. 2" and shall serve in rotation during the absence or disqualification of any regular member or members of Class IV.
C.
If a vacancy of any class shall occur otherwise than by expiration of term, it shall be filled by appointment as above provided for the unexpired term.