Ohio Rev. Code Ann. § 4511.0911
(B)
(2) In addition to the requirement prescribed in division (B)(1) of this section, for every such device that is considered mobile, meaning it is attached to a trailer, vehicle, or other wheeled apparatus so that it is easily moved to different system locations, both of the following apply:
(C) In the case of a traffic law photo-monitoring device that is used at an intersection to detect violations of section 4511.12 of the Revised Code based on the failure to comply with section 4511.13 of the Revised Code or a substantially equivalent municipal ordinance, the local authority shall not issue a ticket for a violation based upon evidence recorded by a traffic law photo-monitoring device when a vehicle makes a legal right or left turn-on-red-signal if all of the following apply: