Miss. Code § 27-57-27
The commissioner and his agents and employees shall have full access, ingress, and egress at all reasonable hours to any place or building where lubricating oil may be received, stored, transported, sold, offered or exposed for sale, manufactured, refined, distilled, compounded, or blended. The commissioner and his agents and employees shall have the right to open and inspect any case, package, or other container, and any tank, pump, tank car or storage tank in which lubricating oil is kept and enter upon any barge, vessel, or other vehicle transporting lubricating oil and, with instruments conforming to the weights and measures adopted by the United States Bureau of Standards, check any measuring device or volume of weight of the contents of any such container.
Miss. Code § 27-57-27