N.C. Gen. Stat. § 143-135.28

If any member of the Commission shall be interested either directly or indirectly, or shall be an officer or employee of or have an ownership interest in any firm or corporation interested directly or indirectly, in any contract authorized by the Commission, that interest shall be disclosed to the Commission and set forth in the minutes of the Commission, and the member having the interest may not participate on behalf of the Commission in the authorization of that contract.