Miss. Code § 27-57-41
Every person hauling, transporting, or conveying more than six (6) gallons of lubricating oil, upon which tax has not been paid, over the highways, streets, alleys or waters of this state, or into this state over any highway, street, alley or water route, shall, during the entire time he is so engaged, have in his possession a bill of sale, bill of lading, invoice, or other written evidence showing the kind and amount of lubricating oil being transported, the name and address of the person from whom said lubricating oil was received, and the name and address of the person to whom delivery is to be made. Likewise, the vehicle or boat conveying such lubricating oil shall have on it the name and address of the person or company transporting such lubricating oil clearly printed on both sides of the vehicle or boat in well-balanced letters of not less than two (2) inches in height on a contrasting background.
Any bonded, qualified distributor transporting lubricating oil from his place of business in this state for delivery to his agent or customer shall not be required to have in his possession while so transporting such lubricating oil the bill of sale, invoice, or other written evidence required by this section, but must conform in all other particulars with this section.
The comptroller, in person, or by any of his employees, any sheriff, deputy sheriff, constable, or police officer of this state, is hereby authorized to inspect any vehicle or boat transporting lubricating oil over the highways, streets, alleys or waters of this state, to examine the contents thereof, to take samples of any lubricating oil contained in said vehicle or boat, said sample not to exceed one quart, and to demand for inspection the production of the invoice, or other records pertaining to the lubricating oil being transported in such vehicle or boat.
Miss. Code § 27-57-41