Except as provided in division (C)(3)(b) of this section, the owner or person in control of private land or premises, and a private person or entity leasing land or premises owned by the state, the United States, or a political subdivision of the state or the United States, may post a sign in a conspicuous location on that land or on those premises prohibiting persons from carrying firearms or concealed firearms on or onto that land or those premises
Except as otherwise provided in this division, a person who knowingly violates a posted prohibition of that nature is guilty of criminal trespass in violation of division (A)(4) of section 2911.21
of the Revised Code and is guilty of a misdemeanor of the fourth degree. If a person knowingly violates a posted prohibition of that nature and the posted land or premises primarily was a parking lot or other parking facility, the person is not guilty of criminal trespass in violation of division (A)(4) of section 2911.21
of the Revised Code and instead is subject only to a civil cause of action for trespass based on the violation.
(b) A landlord may not prohibit or restrict a tenant who is a licensee and who on or after September 9, 2008, enters into a rental agreement with the landlord for the use of residential premises, and the tenant's guest while the tenant is present, from lawfully carrying or possessing a handgun on those residential premises.