N.C. Gen. Stat. § 148-36
All facilities established or acquired by the Division of Prisons of the Department of Adult Correction shall be under the administrative control and direction of the Secretary of the Department of Adult Correction, and operated under rules and regulations proposed by the Secretary and adopted by the Division of Prisons of the Department of Adult Correction as provided in G.S. 148-11. Subject to such rules and regulations, the Secretary shall classify the facilities of the State prison system and develop a variety of programs so as to permit proper segregation and treatment of prisoners according to the nature of the offenses committed, the character and mental condition of the prisoners, and such other factors as should be considered in providing an individualized system of discipline, care, and correctional treatment of persons committed to the Division. The Secretary of the Department of Adult Correction, or his authorized representative, shall designate the places of confinement where sentences to imprisonment in the State's prison system shall be served. The Secretary or his representative may designate any available facility appropriate for the individual in view of custodial and correctional considerations.
N.C. Gen. Stat. § 148-36