N.C. Gen. Stat. § 153A-49
A county may adopt and issue a code of its ordinances. The code may be reproduced by any method that gives legible and permanent copies, and may be issued as a securely bound book or books with periodic separately bound supplements, or as a loose-leaf book maintained by replacement pages. Supplements or replacement pages should be adopted and issued at least annually, unless there have been no additions to or modifications of the code during the year.
A code may consist of two parts, the "General Ordinances" and the "Technical Ordinances." The technical ordinances may be published as separate books or pamphlets, and may include ordinances regarding the construction of buildings, the installation of plumbing and electric wiring, and the installation of cooling and heating equipment; ordinances regarding the use of public utilities, buildings, or facilities operated by the county; the zoning ordinance; the subdivision control ordinance; and other similar ordinances designated as technical ordinances by the board of commissioners. The board may omit from the code the budget ordinance, any bond orders, and other designated classes of ordinances of limited interest or transitory nature, but the code shall clearly describe the classes of ordinances omitted from it.
The board of commissioners may provide that ordinances (i) establishing or amending the boundaries of county zoning areas or (ii) establishing or amending the boundaries of zoning districts shall be codified by appropriate entries upon official map books to be retained permanently in the office of the clerk or some other county office generally accessible to the public.
N.C. Gen. Stat. § 153A-49