N.C. Gen. Stat. § 115B-2.2
Any person who is at least 65 years old may audit courses offered at the constituent institutions of The University of North Carolina and the community colleges as defined in G.S. 115D-2(2) without payment of any required registration fee or tuition for the audit provided the audit is approved in accordance with policies adopted by the Board of Governors and the State Board of Community Colleges for their respective institutions, and there is no cost to the State. A person shall be allowed to audit a class under this section only on a space available basis. Persons auditing classes under this section shall not be counted in the computation of enrollment for funding purposes. This section does not apply to audits of courses provided on a self-supporting basis by community colleges.
N.C. Gen. Stat. § 115B-2.2