N.M. Code R. § 18.19.5.115
Restriction Code Restriction
B Driver must wear corrective lenses while driving.
C Driver limited to vehicles equipped with suitable mechanical aids such as special brakes, hand controls or other adaptive devices.
D Driver must use prosthetic aids (other than glasses) while driving.
E Driver limited to vehicles with automatic transmissions.
K Driver limited to driving a commercial vehicle in intrastate commerce only.
L Driver limited to driving commercial vehicles which do not have air brakes.
M Driver not authorized to drive a Class A bus.
N Driver not authorized to drive a Class A or Class B bus.
O Driver not authorized to drive a Class A tractor trailer combination vehicle.
R Driver limited to operating a school bus.
S Driver authorized to operate only a commercial motor vehicle owned by a governmental entity, and only as a government employee.
T Driver authorized only to operate a Class B or Class C bus.
N.M. Code R. § 18.19.5.115