N.C. Gen. Stat. § 115C-66
Each county of the State shall be classified as a county school administrative unit, the schools of which, except in city administrative units, shall be under the general supervision and control of a county board of education with a county superintendent as the administrative officer.
A city school administrative unit shall be classified as an area within a county or adjacent parts of two or more contiguous counties which has been or may be approved by the State Board of Education as such a unit for purposes of school administration. The general administration and supervision of a city administrative unit shall be under the control of a board of education with a city superintendent as the administrative officer.
All local school administrative units, whether city or county, shall be dealt with by the State school authorities in all matters of school administration in the same way.
For purposes of eligibility for federal grant funds, the Department of Health and Human Services is hereby classified as a public authority, which is the school administrative agency for the schools that it operates, and shall be considered as such by the State school authorities in the administration and distribution of federal grant funds.
N.C. Gen. Stat. § 115C-66