N.C. Gen. Stat. § 158-15

The powers granted to counties and municipalities by this Article shall be deemed supplementary to any powers heretofore or hereafter granted by any general or local act for the same or similar purposes, and in any case where the provisions of this Article conflict with or are different from the provisions of any other act, the board of county commissioners or the municipal governing board may in its discretion proceed in accordance with the provisions of this Article or, as an alternative method, in accordance with the provisions of such other act.