Ohio Rev. Code Ann. § 4513.263
(A) As used in this section and in section 4513.99 of the Revised Code:
(B) No person shall do any of the following:
(C)
(3) Divisions (B)(1) and (3) of this section do not apply to a person who has an affidavit signed by a physician licensed to practice in this state under Chapter 4731. of the Revised Code or a chiropractor licensed to practice in this state under Chapter 4734. of the Revised Code that states the following:
(F)
(2) If, at the time of an accident involving a passenger car equipped with occupant restraining devices, any occupant of the passenger car who sustained injury or death was not wearing an available occupant restraining device, was not wearing all of the available elements of such a device, or was not wearing such a device as properly adjusted, then, consistent with the Rules of Evidence, the fact that the occupant was not wearing the available occupant restraining device, was not wearing all of the available elements of such a device, or was not wearing such a device as properly adjusted is admissible in evidence in relation to any claim for relief in a tort action to the extent that the claim for relief satisfies all of the following:
(G)