Ohio Rev. Code § 1726.08
The board of directors of a corporation incorporated under Chapter 1726. of the Revised Code shall be of such number in multiples of three as shall be determined in the first instance by the incorporators and thereafter by the shareholders and shall be elected in the first instance by the incorporators, and thereafter at each annual meeting of the corporation, or, if no annual meeting is held in any year at the time fixed by the bylaws, at a special meeting held in lieu thereof, the members of the corporation shall elect two-thirds of the board of directors and the shareholders shall elect the remaining directors. The directors shall hold office until the next annual meeting of the corporation or special meeting held in lieu of the annual meeting after their election, and until their successors are elected and qualified unless sooner removed in accordance with the provisions of the bylaws.
Any vacancy in the office of a director elected by the members shall be filled by the directors elected by the members, and any vacancy in the office of a director elected by the shareholders shall be filled by the directors elected by the shareholders.
R.C. §1726.08