N.C. Gen. Stat. § 163-283.1

Any person who will become qualified by age to register and vote in the general election for which a nonpartisan primary is held, even though not so qualified by the date of the primary, shall be entitled to register for the primary and general election prior to the primary and then to vote in the primary after being registered. Such a person may register not earlier than 60 days nor later than the last day for making application to register under G.S. 163-82.6(d) prior to the primary.