Miss. Code Ann. § 27-19-319: Dealer’s use of distinguishing number tags.

A motor vehicle bearing a motor vehicle dealer distinguishing number tag assigned to a motor vehicle dealer may be operated by a dealer, his authorized representative or customer as provided in this section for the following purposes and uses:

(a) For the purpose of testing and adjusting such vehicle in the vicinity of the dealer’s place of business.

(b) For purposes connected with the business of purchasing, selling or exchanging motor vehicles including such use by a dealer or his salesman or other bona fide employee as may be reasonable in showing, exhibiting, displaying or demonstrating vehicles for sale.

(c) For demonstration purposes by prospective purchasers, dealers or full-time employees of the dealership.

(d) For purposes of delivering a heavy truck to and from the dealership or demonstration of a heavy truck, either empty or under load, by prospective bona fide purchasers. However, any such use shall be limited to a period of not more than four (4) days. Any person operating a heavy truck under the provisions of this paragraph shall carry with him at all times while operating such truck written authority so to do signed by the dealer furnishing such heavy truck. A copy of the authorization shall be retained by the dealer.

(e) For business or demonstration use of the dealer or any full-time employee of the dealership.

(f) For use of a customer whose vehicle is being repaired by the dealer, but such use shall not extend for a period of longer than ten (10) days and only when authorized by the dealer in writing.

(g) For nonbusiness use, when operated by dealers or full-time dealership personnel, on a vehicle in inventory and available for sale.