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The Department of Homeland Security (DHS) is extending the REAL ID full enforcement date by 19 months, from October 1, 2021 to May 3, 2023, due to circumstances resulting from the ongoing COVID-19 pandemic.

Commercial Driver License Endorsements or Restrictions

Endorsement Meaning
H Hazardous Materials (Requires background test through TSA before issuance)
N Tank Vehicle
P Passenger
S School Bus
T Doubles and Triple Trailers
X Combination of Hazardous Materials and Tank Vehicle
Restriction Meaning
E When operating a Class A, B or C CMV, restricted to automatic transmission
K CDL Intrastate only (Cannot leave the state of Oklahoma with CDL vehicles)
L Restricted to CDL vehicles without air brakes
M When operating a passenger bus, restricted to Class B or C CDL vehicle
N When operating a passenger bus, restricted to a Class C CMV
O Restricted from operating tractor-trailers
V Medical Variance
Z When operating a CMV, restricted to air over hydraulic


Last Modified on Oct 06, 2020
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