The following information was obtained from the U.S. DOT Office of Drug and Alcohol Policy and Compliance's webpage: What Employers Need to Know About DOT Drug and Alcohol Testing | US Department of Transportation
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If you employ safety-sensitive workers who must have Department of Transportation (DOT) drug and alcohol tests, or you manage a DOT drug or alcohol testing program, this publication can help you understand how to run an excellent program that meets DOT requirements.
This is not a legal document that adds to or makes any official interpretations of DOT rules. This publication is for educational purposes only.
This information was copied from a federal government resource. Always verify the accuracy of this information against the most recent version of the Code of Federal Regulations: https://www.ecfr.gov/current/title-49/subtitle-A/part-40 or the Office of Drug & Alcohol Policy & Compliance: https://www.transportation.gov/odapc.