Squared, you can be random breath tested on the roads here, anywhere, anytime. No probable cause or suspicion required. Random licence and registration checks, they don't have to have a reason to pull you over. Anyone involved in aviation can be random breath & drug checked, check in counter, baggage handler, mechanic. I've been drug & alcohol tested 3 times in the last 9 months (between the hours of 9-5, believe it not!).