N.C. Gen. Stat. § 20-391

If any motor carrier doing business in this State by its agents or employees shall be guilty of the violations of the rules and regulations provided and prescribed by the Division or the State Highway Patrol, and if after due notice of such violation given to the principal officer thereof, if residing in the State, or, if not, to the manager or superintendent or secretary or treasurer if residing in the State, or, if not, then to any local agent thereof, ample and full recompense for the wrong or injury done thereby to any person as may be directed by the Division or State Highway Patrol shall not be made within 30 days from the time of such notice, such motor carrier shall incur a penalty for each offense of five hundred dollars ($500.00).