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Drug and alcohol testing processes
  • Drug and alcohol testing processes are specified in Part 40.
  • Each DOT agency has its own set of regulations, which are supplemented by Part 40.
  • FMCSA drug and alcohol testing rules in Part 382 cross-references Part 40.

Part 40 specifies the procedures to be followed for alcohol and drug tests, any problems that arise during testing, and the handling of the test results. The Federal Motor Carrier Safety Administration clearly states in 382.105 that only Part 40 procedures are permitted for DOT testing programs under its authority.