Oklahoma CDL Endorsements and Restrictions

Oklahoma uses T for doubles or triples, N for tank vehicles, H for hazardous materials, X for tank plus hazardous materials, P for passenger vehicles, and S for school buses. The vehicle class is determined first; endorsements add specialized authority but do not replace the base class.

Only N, P, and S may be placed on a CLP. A P or S learner has a P no-passengers restriction except for specifically permitted examiners, auditors, trainers, and trainees. An N learner receives the X no-cargo-in-tank restriction and may not operate a tank that retains hazardous residue unless it has been purged.

Testing in an automatic vehicle creates E; testing without air brakes creates L; air-over-hydraulic equipment creates Z; a Class A test without the required tractor-trailer configuration creates O; and passenger testing in a smaller vehicle group can create M or N.

Service Oklahoma publishes E, K, L, M, N, O, V, and Z for CDLs, with P and X applying to CLPs. Removing a restriction requires the individualized knowledge, permit, equipment, and skills steps prescribed by Service Oklahoma.

Apply the rule to the exact Oklahoma vehicle, credential, date, trip, test stage, and operating facts. Current Service Oklahoma pages and procedures control when an older generic manual sentence conflicts with a newer official requirement.