351.18 PARKING ON POSTED PRIVATE PROPERTY.
(a) If an owner of private property posts on the property in a conspicuous manner, a prohibition against parking on the property or conditions and regulations under which parking is permitted, no person shall do either of the following:
(1) Park a vehicle on the property without the owner's consent;
(2) Park a vehicle on the property in violation of any condition or regulation posted by the owner. (ORC 4511.681)
(b) Whoever violates this section is guilty of a traffic violation of the minor degree.