This is a list of restriction codes that may be added to an SC commercial driver’s license (CDL) or learner’s permit (CLP) issued on or after July 20, 2015. A description for each code is provided along with an explanation of why a restriction code may be added to a CDL and what can be done to have it removed. 

Code E means No Manual Transmission Equipped CMV 

  • You are restricted from operating a commercial motor vehicle (CMV) without an automatic transmission if the vehicle used during the road test had automatic or semi-automatic transmission. 
  • To remove this restriction, you must pass the entire skills test in a CMV that is not equipped with automatic transmission.

Code K means Intrastate Only

  • You are restricted from operating a CMV outside of SC. This restriction only allows intrastate transportation of shipments/loads that start and end in this state. The load cannot start or finish outside the state of SC (interstate shipment).
  • If you're 18 to 20, you must have this restriction.
  • To remove this restriction, you must visit an SCDMV office once you turn 21 years old to upgrade your license.

Code L means No Airbrake Equipped CMV

  • You are restricted from operating a vehicle with air brakes if the vehicle used during the road test was not equipped with air brakes.
  • To remove this restriction, you must pass the knowledge test for air brakes and pass the skills test in a CMV equipped with air brakes.

Code M means No Class A Bus Passenger Vehicle

  • You are restricted from operating a class A passenger vehicle if you used a class B passenger vehicle during the skills test for your passenger endorsement.
  • To remove this restriction, you must pass the skills test in a class A passenger vehicle.

Code N means No Class A and B Bus passenger vehicle

  • You are restricted from operating a class A or B passenger vehicle if you used a class C passenger vehicle during the skills test for your passenger endorsement. 
  • To remove this restriction, you must pass the skills test in a class A or class B passenger vehicle. However, if a class B passenger vehicle is used, the N restriction will be replaced with an M restriction.

Code O means No Tractor Trailer CMV

  • You are restricted from operating a CMV tractor (pulling unit) with a fifth-wheel connection if you used a unit with a pintle hook, or other non-fifth wheel connection (such as a goose neck, or ball and chain hook up) during the skills test.
  • To remove this restriction, you must pass any necessary knowledge tests for the vehicle you are operating, and pass the complete skills test. The unit used during the skills test must include a fifth-wheel connection, and meet the GVWR requirements. The tractor (pulling unit) must have a GVWR of 26,001 or more pounds and pulling a trailer which has a GVWR of 10,001 pounds or more. The vehicle combination must be a Truck Tractor Semi-Trailer.

Code P means No Passengers in CMV Bus

  • You are restricted from operating a CMV bus in any class (A, B, or C) that is carrying passengers. The only passengers allowed in a vehicle operated by a commercial learner’s permit holder with a P restriction are Federal/State auditors and inspectors, test examiners/testers, other trainees, or the CDL supervising driver.
  • To remove this restriction, you must pass any necessary knowledge tests for the vehicle you are operating and pass the complete skills test for that class vehicle.

Code P1 means Excepted Interstate

  • You are restricted from operating a CMV outside of the authorized activities defined by Federal Motor Carrier Safety Administration, and you are not required to meet the Federal DOT medical certificate requirements.
  • To remove this restriction, you must present a DOT medical certificate, and complete the CDL Holders Medical Certification Requirements (SCDMV Form DL-405A). You must select a type of commerce operation other than “Excepted Interstate”.

Code V means Medical Variance

  • You have a medical variance (Federal Waiver or Skills Performance Evaluation) that goes along with your DOT medical certification.
  • This restriction must never be removed as long as the DOT medical certificate references a medical variance.

Code X means No Cargo in CMV Tank Vehicle

  • You are restricted from operating a commercial motor tank vehicle with any residue in the tank. If the tank vehicle previously contained hazardous materials, the tank must be purged, and the operator must carry a purge certificate.
  • To remove this restriction from a commercial learner’s permit you must pass any necessary knowledge tests for the vehicle you are operating and pass the complete skills test for that class and type vehicle.

Code Z means No Full Air Brake Equipped CMV

  • You are restricted from operating a CMV without full air brakes if you performed the skills test in a vehicle equipped with air over hydraulic brakes. Air over hydraulic brakes includes any braking system operating partially on the air brake and partially on the hydraulic brake principle.
  • To remove this restriction, you must pass any necessary knowledge tests for the vehicle you are operating, and pass the complete skills test. The unit used during the skills test must equipped with full air brakes.