N.C. Gen. Stat. § 106-275

It shall be a Class 1 misdemeanor for any person, firm, association, or corporation, selling seeds, tubers, plants, or plant parts in North Carolina, to use any evidence of certification, such as a blue tag or the word "certified" or both, on any package of seed, tubers, plants, or plant parts, nor shall the word "certified" be used in any advertisement of seeds, tubers, plants, or plant parts, unless such commodities used for plant propagation shall have been duly inspected and certified by the agency of certification provided for in this Article, or by a similar legally constituted agency of another state or foreign country.