N.C. Gen. Stat. § 160A-76

(1) No ordinance making a grant, renewal, extension, or amendment of any franchise shall be finally adopted until it has been passed at two regular meetings of the council, and no such grant, renewal, extension, or amendment shall be made otherwise than by ordinance.

(2) Any published technical code or any standards or regulations promulgated by any public agency may be adopted in an ordinance by reference subject to G.S. 143-138(e). A technical code or set of standards or regulations adopted by reference in a city ordinance shall have the force of law within the city. Official copies of all technical codes, standards, and regulations adopted by reference shall be maintained for public inspection in the office of the city clerk.