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United States Department of Transportation
FMCSA - Federal Motor Carrier Safety Adminstration

Drug & Alcohol Clearinghouse

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Can Canadian and Mexican medical review officers (MROs) report confirmed positive test results and refusals to test to the Clearinghouse?

Yes, if the MRO meets the requirements under § 40.121.

Last Updated : July 22, 2019

Are Canadian and Mexican CDL drivers conducting operations in the United States subject to the Clearinghouse requirements?

Yes, all Mexican or Canadian employers, employees, or service agents operating in the United States that are subject to the Federal Motor Carrier Safety Administration (FMCSA) drug and alcohol testing requirements must comply with the Clearinghouse final rule.

Last Updated : November 05, 2021

Are Canadian and Mexican employers required to report drug and alcohol program violations to the Clearinghouse?

Only Canadian and Mexican employers operating in the United States that are subject to the Federal Motor Carrier Safety Administration (FMCSA) drug and alcohol testing requirements must report drug and alcohol program violations to the Clearinghouse.

Last Updated : July 22, 2019

Can Canadian and Mexican substance abuse professionals (SAPs) report the date of initial SAP assessment and date the driver is eligible for return-to-duty (RTD) testing?

Yes, if the SAP meets the requirements under § 40.281.

Last Updated : October 18, 2019