Ohio Rev. Code § 2923.1212: Signage prohibiting concealed handguns.

Each person, board, or entity that owns or controls any place or premises identified in division (B) of section 2923.126 of the Revised Code as a place into which a valid license does not authorize the licensee to carry a concealed handgun, or a designee of such a person, board, or entity, shall post in one or more conspicuous locations in the premises a sign that contains a statement in substantially the following form: "Unless otherwise authorized by law, pursuant to the Ohio Revised Code, no person shall knowingly possess, have under the person's control, convey, or attempt to convey a deadly weapon or dangerous ordnance onto these premises."