Ohio Rev. Code § 735.03
Whenever the legislative authority of any city, by ordinance, declares it essential to the best interests of such city, the duties relating to the management and operation of municipally owned public utilities conferred upon the director of public service by sections 735.02 and 743.03 of the Revised Code shall be vested in a board composed of three members. The mayor, with the consent of the legislative authority, shall appoint one member for a term of two years, one for a term of four years, and one for a term of six years. At the expiration of each term of office an appointment shall be made for a term of six years. In case of vacancy by death, resignation, or removal from the city of a member of such board, the mayor, with the consent of the legislative authority, shall immediately appoint a successor to fill the vacancy for the unexpired term. The legislative authority shall designate the compensation to be paid to said members, their duties, authority, and powers. Except as otherwise provided in section 3.061 of the Revised Code, the legislative authority shall determine whether such members shall be required to give bond, and, if so, in what amount. The cost of any required bond shall be borne by the city.
R.C. § 735.03