The license issued by the Commissioner shall be posted at the barber, barber apprentice, instructor or graduate-apprentice work station. The license shall not be valid unless it is posted in a conspicuous location visible to the client, and a photo ID is in the possession of the person performing barbering. The photo ID shall be presented to any authorized representative of the Oklahoma State Department of Health upon request.
Okla. Admin. Code § 310:210-5-4