N.C. Gen. Stat. § 20-29.1
The Commissioner of Motor Vehicles, having good and sufficient cause to believe that a licensed operator is incompetent or otherwise not qualified to be licensed, may, upon written notice of at least five days to such licensee, require him to submit to a reexamination to determine his competency to operate a motor vehicle. Upon the conclusion of such examination, the Commissioner shall take such action as may be appropriate, and may suspend or revoke the license of such person or permit him to retain such license, or may issue a license subject to restrictions or upon failure of such reexamination may cancel the license of such person until he passes a reexamination. Refusal or neglect of the licensee to submit to such reexamination shall be grounds for the cancellation of the license of the person failing to be reexamined, and the license so canceled shall remain canceled until such person satisfactorily complies with the reexamination requirements of the Commissioner. The Commissioner may, in his discretion and upon the written application of any person qualified to receive a driver's license, issue to such person a driver's license restricting or limiting the licensee to the operation of a single prescribed motor vehicle or to the operation of a particular class or type of motor vehicle. Such a limitation or restriction shall be noted on the face of the license, and it shall be unlawful for the holder of such limited or restricted license to operate any motor vehicle or class of motor vehicle not specified by such restricted or limited license, and the operation by such licensee of motor vehicles not specified by such license shall be deemed the equivalent of operating a motor vehicle without any driver's license. Any such restricted or limited licensee may at any time surrender such restricted or limited license and apply for and receive an unrestricted driver's license upon meeting the requirements therefor.
N.C. Gen. Stat. § 20-29.1