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A driver cannot refuse to submit to a Department of Transportation (DOT)-required test, and an employer cannot permit a driver who refuses to submit to a test to perform or continue to perform a safety-sensitive function. A refusal to test is treated the same way as testing positive for drugs or failing an alcohol test.
These requirements apply to all people who operate a commercial motor vehicle (CMV) requiring a commercial driver’s license (CDL) in interstate, intrastate, or foreign commerce and the motor carriers of these drivers.
Refusal to submit (to an alcohol or controlled substances test) means that a driver:
A driver may not refuse to submit to a pre-employment drug test and a driver may not refuse to submit to the following alcohol or drug tests:
A motor carrier must not allow a driver to perform or continue to perform safety-sensitive functions if the driver refuses any of the alcohol or drug tests listed above.