Ohio Rev. Code § 705.12
Members of the legislative authority of a municipal corporation shall be electors of the municipal corporation. They shall not hold any other public office or employment, except that of notary public or member of the state militia, or state or county central committeeman of a political party, or state or county executive committeeman of a political party, or state or county officer of a political party, and shall not be interested in the profits or emoluments of any contract, job, work, or service for the municipal corporation. Any member who ceases to possess any of the qualifications required by this section shall forthwith forfeit his office. Any contract in which any such member is or becomes interested may be declared void by the legislative authority.
R.C. §705.12