U.S. Code of Federal Regulations

Regulations most recently checked for updates: Sep 16, 2025

All TitlesTitle 49Chapter VIPart 655Subpart E - Subpart E—Types of Testing
§ 655.41 - Pre-employment drug testing.
§ 655.42 - Pre-employment alcohol testing.
§ 655.43 - Reasonable suspicion testing.
§ 655.44 - Post-accident testing.
§ 655.45 - Random testing.
§ 655.46 - Return to duty following refusal to submit to a test, verified positive drug test result and/or breath alcohol test result of 0.04 or greater.
§ 655.47 - Follow-up testing after returning to duty.
§ 655.48 - Retesting of covered employees with an alcohol concentration of 0.02 or greater but less than 0.04.
§ 655.49 - Refusal to submit to a drug or alcohol test.
§ 655.50 - [Reserved]
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