(1) Except as otherwise provided in this section, an intermediate school district shall be under the supervision and control of an intermediate school board composed of 5 members elected under this part.

    (2) In an intermediate school district that adopts section 615 to 617 for popular election of its members, or in an intermediate school district reorganized under section 701, the number of intermediate school board members shall be 7.

    (3) In an intermediate school district whose boundaries are enlarged by a dissolution under section 703, the number of intermediate school board members, at the option of the intermediate school board, may be 7.

    (4) Beginning on the effective date of this subsection, an intermediate school board may by resolution change the number of intermediate school board members to 7. Before adopting the resolution to change the number of intermediate school board members to 7, an intermediate school board shall hold at least 2 public hearings on the resolution. If an intermediate school board determines that the terms of intermediate school board members should be staggered differently than provided under this act or any bylaws of the intermediate school board due to a change in the number of board members under this subsection, the intermediate school board may adopt bylaws or amend its bylaws to change the way that intermediate school board members’ terms are staggered. The bylaws may alter the current terms of members serving at the time the bylaws are adopted to implement the change in the way that terms are staggered. If an intermediate school board adopts or amends bylaws under this subsection that alter a member’s existing term, the member’s term is subject to that action.