(1) If a proposed consolidation includes a portion of a township, the term “municipality” as defined in section 1 and 12 when used in this section and sections 14, 15, and 17 means only that portion included within the proposed consolidated city. Except as provided in subsection (2), when its order approving a proposed consolidation becomes final, the commission shall call an election of 9 charter commissioners who shall be registered electors of the municipalities proposed for consolidation, each having a residence of at least 2 years in the municipality from which he or she is to be elected immediately before the election. The commission shall determine the number of charter commissioners to be elected from each municipality proposed for consolidation, which number shall be as nearly proportionate as possible to the municipality’s population. Each municipality proposed for consolidation is entitled to a minimum of 1 charter commissioner, regardless of population. If charter commissioners are elected at the same election at which the proposition to consolidate is submitted, the election of the charter commissioners is void if the proposition to consolidate is not adopted. If charter commissioners are not elected at the election at which the proposition to consolidate is submitted they shall be elected at a separate election to be held within 60 days after a favorable vote on the proposition to consolidate, which election date shall be set by the commission. A municipal officer or employee, elected or appointed, shall not be eligible for election to the charter commission.

  (2) The municipalities proposed for consolidation may, by resolution of their respective governing bodies, choose to appoint their charter commissioners pursuant to this subsection. If the municipalities proposed for consolidation choose to appoint their charter commissioners pursuant to this subsection, the commission, when its order approving a proposed consolidation becomes final, shall instruct the governing bodies of the municipalities proposed for consolidation to appoint not less than 8 and not more than 10 charter commissioners. The governing body of each municipality proposed for consolidation shall appoint an equal number of charter commissioners. The appointees for charter commissioner shall be residents of the municipalities from which they are to be appointed for not less than 2 years immediately preceding the appointment and shall also be registered electors in the municipalities from which they are to be appointed. The charter commissioners shall be appointed within 180 days after the commission’s order approving a proposed consolidation becomes final as determined pursuant to section 12a(3). A municipal officer or employee, elected or appointed, shall not be eligible for appointment to the charter commission. This subsection shall apply to all municipalities whose proposals for consolidation are approved by the commission after January 1, 1982.