N.C. Gen. Stat. § 53-185

The State Banking Commission is hereby authorized, empowered and directed to make all rules and regulations deemed by the Commission to be necessary in implementing this Article and in providing for the protection of the borrowing public and the efficient management of such licensees and to give all necessary instructions to such licensees for the purpose of interpreting this Article; provided, the Commissioner is hereby authorized to make such rules and regulations and issue such orders as he deems necessary and desirable in implementing and carrying out the provisions of G.S. 53-184. And it shall be the duty of all such licensees, their officers, agents and employees, to comply fully with all such rules, regulations and instructions. When promulgated, any rule or regulation shall be forwarded by mail to each licensee at its licensed place of business at least 20 days prior to its effective date.