Drug Testing Information Links Drug and Alcohol Testing Industry Association Drug Testing News Federal Motor Carrier Safety Administration Federal Workplace Drug and Alcohol Testing: DOT Part 40, DOT Part 382 Institute for a Drug-Free Workplace International Journal of Drug Testing Medical Qualifications of Drivers Part 391 Office of National Drug Control Policy (ONDCP) Occupational Safety and Health Administration Substance Abuse Information Database (SAID) US Department of Health : Substance Abuse Statistics