N.C. Gen. Stat. § 115C-241
The superintendent of the schools of each local school administrative unit which shall elect to operate a school bus transportation system, shall, prior to the commencement of each regular school year and subject to the approval of the local board of education, allocate and assign to the respective public schools within the jurisdiction of such local school administrative unit the school buses which the local board shall own and direct to be operated during such school year. From time to time during such school year, subject to the directions of the local board of education, the superintendent may revise such allocation and assignment of school buses in accordance with the changing transportation needs and conditions at the respective schools of such local school administrative unit, and may, pursuant to such revision, assign an additional bus or buses to a school or withdraw a bus or buses from a school in such local school administrative unit.
N.C. Gen. Stat. § 115C-241