N.C. Gen. Stat. § 143-58
If any department, institution or agency of the State government, required by this Article and the rules adopted pursuant thereto applying to the purchase or lease of supplies, materials, equipment, printing or services through the Secretary of Administration, or any nonstate institution, agency or instrumentality duly authorized or required to make purchases through the Department of Administration, shall contract for the purchase or lease of such supplies, materials, equipment, printing or services contrary to the provisions of this Article or the rules made hereunder, such contract shall be void and of no effect. If any such State or nonstate department, institution, agency or instrumentality purchases any supplies, materials, equipment, printing or services contrary to the provisions of this Article or the rules made hereunder, the executive officer of such department, institution, agency or instrumentality shall be personally liable for the costs thereof.
N.C. Gen. Stat. § 143-58