Ohio Rev. Code Ann. § 303.48

In any suit, action, or proceeding involving the validity or enforcement of any bond issued under any of the provisions of sections 303.26 to 303.56, inclusive, of the Revised Code, or the security therefor, any such bond reciting in substance that it has been issued by the county in connection with county renewal project of such county shall be considered to have been issued for such purpose, and such project shall be considered to have been planned, located, and undertaken or carried out in accordance with the provisions of sections 303.26 to 303.56, inclusive, of the Revised Code.