N.C. Gen. Stat. § 163-97.1
The State Board of Elections shall be authorized to promulgate appropriate procedures to order the county boards of elections to change the registration affiliation of all voters who are recorded on the voter registration books as being affiliated with a political party which has lost its legal status as provided in G.S.163-97. The State Board of Elections shall not implement the authority contained in this section earlier than 90 days following the certification of the election in which the political party failed to continue its legal status as provided in G.S.163-97. All voters affiliated with such expired political party shall be changed to "unaffiliated designation" by the State Board's order and all such registrants shall be entitled to declare a political party affiliation as provided in G.S.163-82.17.
N.C. Gen. Stat. § 163-97.1