Thank you for letting me speak. I just want to touch on the measures of intoxication, with regard to measuring cannabinoids or THC in the system. As I touched on earlier, these measures are per se limits. That means they're quantifying the concentration of a certain product in the blood.
It is important to note that, as you touched on earlier, the chiefs of police did not endorse the use of per se limits, stating that:
Evidence-based permissible limits are not defined and supported by science.
There is no evidence that “per se” limits adequately quantify impairment and therefore we are concerned with regards to potential challenges within our judicial system. We know with cannabis that people react differently to its effects. Per se limits must be research-based and the science must catch-up to strengthen their credibility.
Meanwhile, although there are roadside tests such as a swab test or a blood test available in Canada, the per se limit doesn't necessarily indicate impairment, so there would be an issue with regard to taking per se limits into account of impairment.