There are no greater restrictions on OC as opposed to CC.
There are basically 5 places off-limits.
1.) Places that serve alcohol for onsite consumption. So if a restaurant serves alcohol at a bar or with meals, you can't carry anywhere inside the building at all.
2.) A room where a judicial proceeding is taking place.
3.) Schools (Can be left in car)
4.) Public parks, civic center and recreational property and buildings. (Can have in car)
5.) Any place with a sign posted per 39-17-1359. The sign must reference 39-17-1359 and can not be just a Gun & Slash sign. However a properly posted sign does carry the weight of law and if you violate it, it is $500 fine.