A person may receive no more than two medical exception permits that are valid at any one time. A permit issued under this subsection shall specify the vehicle to which it applies, the windows that may be tinted, and the permitted levels of tinting. The permit shall be carried in the vehicle to which it applies when the vehicle is driven on a highway.
The Division shall give a person who receives a medical exception permit a sticker to place on the lower left-hand corner of the rear window of the vehicle to which it applies. The sticker shall be designed to give prospective purchasers of the vehicle notice that the windows of the vehicle do not meet the requirements of G.S. 20-127(b), and shall be placed between the window and the tinting when the tinting is installed. The Division shall adopt rules regarding the specifications of the medical exception sticker. Failure to display the sticker is an infraction punishable by a two hundred dollar ($200.00) fine.
N.C. Gen. Stat. § 20-127