N.C. Gen. Stat. § 153A-48
The clerk shall maintain an ordinance book, separate from the minute book of the board of commissioners. The ordinance book shall be indexed and shall be available for public inspection in the office of the clerk. Except as provided in this section and in G.S. 153A-47, each county ordinance shall be filed and indexed in the ordinance book.
The budget ordinance and any amendments thereto, any bond order, and any other ordinance of limited interest or transitory nature may be omitted from the ordinance book. However, the ordinance book shall contain a section showing the caption of each omitted ordinance and the page in the commissioners' minute book at which the ordinance may be found.
If a county adopts and issues a code of its ordinances, county ordinances need be recorded and indexed in the ordinance book only until they are placed in the codification.
N.C. Gen. Stat. § 153A-48