N.C. Gen. Stat. § 93-4
It shall be unlawful for any firm, copartnership, or association to assume or use the title of certified public accountant, or to use any words, letters, abbreviations, symbols or other means of identification to indicate that the members of such firm, copartnership or association have been admitted to practice as certified public accountants, unless each of the members of such firm, copartnership or association first shall have received a certificate of qualification from the State Board of Certified Public Accountant Examiners or been granted a practice privilege admitting each member of the firm, copartnership, or association to practice as a certified public accountant; provided, however, that the Board may exempt those persons who do not actually practice in or reside in the State of North Carolina from registering and receiving a certificate of qualification under this section.
N.C. Gen. Stat. § 93-4