DOT related helpful links:
DEA – Drug Enforcement Admin
Drug & Alcohol Testing Rules & Regulations
DOT – Department of Transportation
FMCSA – Federal Motor Carrier Administration
FAA – Federal Aviation Administration
FTA – Federal Transit Administration
SAMHSA – Substance Abuse & Mental Health Services Administration

NDASA – National Drug & Alcohol Screening Association
DATIA – Drug & Alcohol Testing Industry Association
AAMRO – American Association of Medical Review Officers
SAPAA – Substance Abuse Program Administrators Association
NCADD – National Council on Alcoholism & Drug Dependence
EAP – Employee Assistance Professionals Association