RE:RE:RE:RE:RE:RE:OPP Approach to SWABtoo finish my thoughts on the subject if the alcohol has over taken the cannabis effects your not impaired your drunk and the cops will have you either way by recent use of cannabis or drunk or both zero tolerance thc means if you toked two hours before blowing you are guilty of dui they will most likely be able to keep a sample of your breath and have it analyzed by the big M.S. if it goes to court they will cover all the angles