Ohio Revised Code Title XLI. Labor and Industry § 4121.24

No action, proceeding, or suit to set aside, vacate, or amend any order of the bureau of workers' compensation, or to enjoin the enforcement thereof, shall be brought unless the plaintiff has applied to the bureau for a hearing thereon at the time and as provided in section 4121.23 of the Revised Code and in the petition therefor has raised every issue raised in the action.

Every order of the bureau is, in every prosecution for a violation thereof, conclusively presumed to be just, reasonable, and lawful, unless prior to the institution of the prosecution for the violation an action has been brought to vacate and set aside the order as provided in section 4121.28 of the Revised Code.