N.C. Gen. Stat. § 163-258.28
Notwithstanding any other provisions of this Chapter, an individual shall be permitted to register in person at any time the office of the board of elections or the voting place is open, including the day of a primary or election if that individual was absent on the day the registration records close for an election, but returns to that individual's county of residence in North Carolina thereafter, and if the absence is due to uniformed service as defined by G.S. 163-258.2.
If an individual so absent on the day registration closes shall appear in person at the voting place on election day and is otherwise eligible to vote, that individual shall be entitled to register and vote at the voting place that day, regardless of whether the person's uniformed service status has changed since the close of registration.
N.C. Gen. Stat. § 163-258.28