Miss. Code Ann. § 63-1-207: Miss. Code Ann. § 63-1-207

(1) Except when driving under a commercial learner's permit and accompanied by the holder of a commercial driver's license valid for the vehicle being driven, no person may drive a commercial motor vehicle on the highways of this state unless the person:

(a) Holds a commercial driver's license;

(b) Is in immediate possession of the license; and

(c) The license has the applicable endorsements valid for the vehicle the person is driving.

(2) No person may be found to have committed a violation of subsection (1) of this section if the person provides proof to the court having jurisdiction of the traffic complaint that the individual held a commercial driver's license valid for the vehicle the person was driving on the date the complaint was issued.

(3) No person may drive a commercial motor vehicle while the person's driving privilege is suspended, revoked, or cancelled, while subject to a disqualification.

(4) No person may drive a commercial motor vehicle in violation of an out-of-service order.

(5)(a) Notwithstanding the provisions of this section, employees of farm-related service industries shall be exempt from the knowledge and skills tests required under this article, and shall be issued restricted commercial driver's licenses as long as the applicants meet the requirements of 49 CFR, Part 383 , as amended from time to time, and upon payment of the appropriate fee.

(b) “ Farm-related service industries ” shall include farm retail outlets and suppliers, agri-chemical businesses, custom harvesters, and livestock feeders.