Ohio Rev. Code § 305.27
No county commissioner shall be concerned, directly or indirectly, in any contract for work to be done or material to be furnished for the county. For a violation of this section, a commissioner shall forfeit not less than two hundred nor more than two thousand dollars, to be recovered by a civil action, in the name of the state, for use of the county. Such commissioner shall also forfeit, in like manner, any compensation he may have received on such contract.
This section does not apply where a commissioner, being a shareholder of a corporation but not an officer or director, owns not in excess of five per cent of the stock of such corporation and the value of the stock so owned does not exceed five hundred dollars. If a stockholder desires to avail himself of the exception provided in this section, before entering upon such contract he shall first file with the clerk of the board of commissioners an affidavit stating his exact status and connection with such corporation.
R.C. §305.27