Ohio Rev. Code Ann. § 2701.10
(B)
(1) The parties to any civil action or proceeding pending in any court of common pleas, municipal court, or county court unanimously may choose to have the action or proceeding in its entirety referred for adjudication, or to have any specific issue or question of fact or law in the action or proceeding submitted for determination, to a judge of their choosing who has registered with the clerk of that court in accordance with division (A) of this section. If the parties unanimously do choose to have a referral or submission made to a retired judge pursuant to this section, all of the parties to the action or proceeding shall enter into a written agreement with the retired judge that does all of the following:
(c) Indicates either of the following: