Ohio Rev. Code Ann. § 4506.11
(A) Every commercial driver's license shall be marked "commercial driver's license" or "CDL" and shall be of such material and so designed as to prevent its reproduction or alteration without ready detection. The commercial driver's license for licensees under twenty-one years of age shall have characteristics prescribed by the registrar of motor vehicles distinguishing it from that issued to a licensee who is twenty-one years of age or older. Every commercial driver's license shall display all of the following information: