Know Your Rights DRUG & ALCOHOL REGULATIONS For more information: Department of Transportation: Drug & Alcohol Testing Regulations (link) The federal regulations require drug and alcohol testing in six situations: • Pre-employment • Reasonable suspicion • Post-accident • Random • Return to Duty • Follow-up drug and alcohol testing for “safety-sensitive” employees in the mass transit, over-the-road bus and school bus industries. U.S. DOT Rules & Regulations (link)