Section 20-133 - Enforcement of provisions(a) The Commissioner is authorized to designate, furnish instructions to and to supervise official stations for adjusting headlamps and auxiliary driving lamps to conform with the provisions of G.S. 20-129. When headlamps and auxiliary driving lamps have been adjusted in conformity with the instructions issued by the Commissioner, a certificate of adjustment shall be issued to the driver of the motor vehicle on forms issued in duplicate by the Commissioner and showing date of issue, registration number of the motor vehicle, owner's name, make of vehicle and official designation of the adjusting station.(b) The driver of any motor vehicle equipped with approved headlamps, auxiliary driving lamps, rear lamps or signal lamps, who is arrested upon a charge that such lamps are improperly adjusted or are equipped with bulbs of a candlepower not approved for use therewith, shall be allowed 48 hours within which to bring such lamps into conformance with the requirements of this Article. It shall be a defense to any such charge that the person arrested produce in court or submit to the prosecuting attorney a certificate from an official adjusting station showing that within 48 hours after such arrest such lamps have been made to conform with the requirements of this Article.