Ohio Rev. Code § 4507.04: Nonresident exemption.

Nonresidents, permitted to drive upon the highways of their own state, may operate any motor vehicle upon any highway in this state without examination or license under sections 4507.01 to 4507.39, inclusive, of the Revised Code, upon condition that such nonresidents may be required at any time or place to prove lawful possession, or their right to operate, such motor vehicle, and to establish proper identity.