N.C. Gen. Stat. § 20-10
It shall be unlawful for any person, whether licensed under this Article or not, who is under the age of 18 years to drive a motor vehicle while in use as a public passenger-carrying vehicle. For purposes of this section, an ambulance when operated for the purpose of transporting persons who are sick, injured, or otherwise incapacitated shall not be treated as a public passenger-carrying vehicle.
No person 14 years of age or under, whether licensed under this Article or not, shall operate any road machine, farm tractor or motor driven implement of husbandry on any highway within this State. Provided any person may operate a road machine, farm tractor, or motor driven implement of husbandry upon a highway adjacent to or running in front of the land upon which such person lives when said person is actually engaged in farming operations.
N.C. Gen. Stat. § 20-10