I have zero knowledge on that stuff but have messed up with booze and thc. Too much is too much of either or both! Different amounts for different folks to tip the scales. They just have to put an arbitrary number on it, write it into legislation and go with it. I'm not sure how the DWD committee decided that pot smokers would be doing coke and meth too or are they just looking for a holy-grail breathalyzer. It would seem to me that if the tender was for booze and thc it would capture more people so be more useful. The nice Canadians are trying to keep the two separate at all levels. Won't even allow them to be sold in the same store as alcohol let alone mix them together unless that has changed and I missed it. Regulatory types don't seem to recognize that booze is a drug. glta and dyodd