Commercial Endorsements

CDL

Endorsement code

Description

T

Double/Triple Trailers (Knowledge test only)

P

Passenger (Knowledge and Skills Tests)

N

Tank vehicle (Knowledge test only)

H

Hazardous materials (Knowledge test only)

X

Combination of tank vehicle and hazardous materials endorsements (Knowledge test only)

S

School Bus (Knowledge and Skills Tests)

CLP Endorsements - Only 3 endorsements are allowed on the CLP

P

Passenger, A CLP holder with a "P" endorsement is prohibited from operating a CMV carrying passengers, other than Federal/state auditors and inspectors, test examiners, other trainees, and the CDL holder accompanying the CLP holder as prescribed by 49CFR383.25(a)(1).

S

School Bus, A CLP holder with an "S" endorsement is prohibited from operating a school with passengers, other than Federal/state auditors and inspectors, test examiners, other trainees, and the CDL holder accompanying the CLP holder as prescribed by 49CFR383.25(a)(1).

N

Tank Endorsement, A CLP holder with an "N" endorsement may only operate an empty tank vehicle, and is prohibited from operating any tank vehicle that previously contained hazardous materials that have not been purged of any residue.