N.C. Gen. Stat. § 106-194

Agents and employees are authorized from time to time to ascertain the amount of any farm products in this State, to inspect the same in the possession of any person engaged in the business of marketing them in this State, and to take samples of such products. In carrying out these purposes agents and employees are authorized to enter on any business day, during the usual hours of business, any storehouse, warehouse, cold storage plant, packing house, stockyard, railroad yard, railroad car, or any other building or place where farm products are kept or stored by any person engaged in the business of marketing farm products.