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All driver license services, including issuance, renewals, reinstatements, and disability placards, are now operated by Service Oklahoma. Visit for more information or call 405-522-7000.

CDL Restrictions - No Cargo in CMV Tank Vehicle

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 has not been purged of any residue. (You cannot test in a vehicle that is placarded for hazmat whether it has been purged or not per Oklahoma Administrative Code (OAC) 595:11-3-7 and 595:11-3-8).

Last Modified on Oct 05, 2020
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