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www.fmcsa.dot.gov

Responsible for the issuance, administration, and enforcement safety regulations, hazardous materials regulations, as it pertains to the drug and alcohol testing requirements.

URLs from www.fmcsa.dot.gov:

URL: https://www.fmcsa.dot.gov/rules-regulations/topics/drug/engtesting.htm?printer=true URL: http://www.fmcsa.dot.gov