49 CFR Part 382 — DOT Drug & Alcohol Testing
The federal regulation establishing drug and alcohol testing requirements for commercial motor vehicle drivers.
Key Facts
- Core regulation for CDL driver drug and alcohol testing
- Specifies six testing categories: pre-employment, random, post-accident, reasonable suspicion, return-to-duty, follow-up
- Requires random drug testing at 50% annual rate
- Requires random alcohol testing at 10% annual rate
- Integrates with Clearinghouse reporting requirements
49 CFR Part 382 — "Controlled Substances and Alcohol Use and Testing" — establishes the framework for drug and alcohol testing of CDL-holding, safety-sensitive employees. The regulation requires employers to conduct six categories of testing: pre-employment (382.301), post-accident (382.303), random (382.305), reasonable suspicion (382.307), return-to-duty (382.309), and follow-up (382.311). Random testing rates are set at 50% per year for drugs and 10% for alcohol. The regulation also covers prohibitions on use (382.201–215), consequences for violations, employer obligations, and integration with the FMCSA Clearinghouse. Testing procedures must follow 49 CFR Part 40.
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