N.C. Gen. Stat. § 160A-563

In every action against the authority for damages, for injuries to real or personal property, or for the destruction thereof, or for personal injuries or death, the complaint shall contain an allegation that at least 30 days have elapsed since the demand, claim or claims upon which such action is founded were presented to a member of the authority, or to its secretary, or to its chief executive officer and that the authority has neglected or refused to make an adjustment or payment thereof for 30 days after such presentment.