I'm not having a go at you, BTW. My point is, why was CASR 99 promulgated if CAR 256 was already legally water-tight?
In medically defined terms, human beings can have a blood alcohol level of up to .04 (in some cases higher) with no loss of coordination or impaired judgement. In fact, some medical studies have shown increased performance with small amounts of alcohol in the bloodstream.
That is just one legal defense against CAR 256