1. What are Restriction Codes?
   
   
   • Restrictions may be added to Commercial Driver Licenses/Permits based upon the type of vehicle and equipment that the driver uses for the CDL Skills Test. There are ten standardized restriction codes.
     
     
     1. No Manual Transmission (E)
        
        
     2. Intrastate Only (K)
        
        
     3. No Air Brake Equipped CMV (L)
        
        
     4. No Class A Passenger Vehicle (M)
        
        
     5. No Class A or B Passenger Vehicle (N)
        
        
     6. No Tractor Trailer CMV (O)
        • An applicant who passes a skills test using a combination vehicle that is NOT a truck tractor semi-trailer combination (the conventional semi), but is otherwise equipped with a fifth wheel, will be issued a CDL with an “O” restriction.
          
          
     7. No Passengers in CMV Bus (P)
        
        
     8. Medical Variance (V)
        
        
     9. No Cargo in CMV Tank Vehicle (X)
        
        
     10. No Full Air Brake Equipped CMV (Z)
         
         
2. Do I have to do a pre-trip to remove a restriction?
   
   
   • If a drive test is required then you must get a permit, hold it for the full 14 days, and then do all three parts of the CDL Skills Test. The only exception to this is for removing the restriction E-automatic transmission. If you are just removing the restriction E and not making any other changes to the current CDL license, then you will not have to do the pre-trip inspection. You will do the basic control skills and the road test only.
     
     
3. Do I need to obtain a Commercial Learner Permit if I am removing a restriction?
   
   
   • If the restriction you are removing requires a drive test, yes, you will be required to obtain a CLP (Commercial Learner Permit) first and hold it for a minimum of 14 days before you are eligible for the skills test to remove said restriction.
     

*A Commercial License Permit (CLP) holder with a S endorsement is prohibited from operating a school bus with passengers, other than Federal/Federal/State auditors and inspectors, test examiners, other trainees, and the CDL holder accompanying the CLP holder as prescribed by CFR 383.25(a)(1) of this part.