N.C. Gen. Stat. § 163-119
Voting by unaffiliated voter in party primary.
§ 163-119. Voting by unaffiliated voter in party primary.
Unaffiliated voters shall be allowed to vote in one primary of the voter's choosing, subject to the provisions of G.S. 163-59, 163-111, and 163-166.7. Each unaffiliated voter may vote in the primary of that party by announcing that intention under G.S. 163-166.7(a).