N.C. Gen. Stat. § 158-17
There shall be no new registration of voters for such an election. Registration shall be open for registration of new voters in said county and registration of any and all legal residents of said county, who are or could legally be enfranchised as qualified voters for regular general elections, shall be carried out in accordance with the general election laws of the State of North Carolina as provided for local elections. Notice of such registration of new voters shall be published in a newspaper circulated in said county, once, not less than 55 days before and not more than 65 days before the election, stating the hours and days for registration. The special election, if called, shall be under the control and supervision of the county board of elections.
N.C. Gen. Stat. § 158-17