N.C. Gen. Stat. § 119-28 (2026)

All materials, fluids, or substances offered or exposed for sale, purporting to be substitutes for or motor fuel improvers, shall, before being sold, exposed or offered for sale, be submitted to the Commissioner of Agriculture for examination and inspection, and shall only be sold or offered for sale when properly labeled with a label, the form and contents of which label has been approved by the said Commissioner of Agriculture in writing. (1937, c. 425, s. 12; 1949, c. 1167.)