North Carolina has a State Board of Elections, and county boards of election. The law says all members of these boards must be registered members of one or the other of the two largest parties. A federal lawsuit is currently pending against the exclusion of independents. Common Cause v Moore, m.d., 1:22cv-611.
The defendants are trying to get the case dismissed without the need for a trial. The latest brief was filed on May 30, by the plaintiffs, who argue that they do have standing and that the court deserves a trial. Read it here.