The Office of General Counsel and Office of Drug and Alcohol Policy and Compliance of the Department of Transportation periodically publish questions and answers. The DOT Part 40 Questions and Answers constitute an official and authoritative guidance and interpretation concerning 49 CFR Part 40 (see 49 CFR 40.5).
We will be closed Monday, May 27th for Memorial Day. Orders placed after 1:00 pm on Friday will ship on Tuesday. Dismiss