The reassurance we got was from the expert panel, from Dr Poulsen, in things like the degree of science they were able to bring to us. I'll just quote one of the findings: "When cannabis is inhaled, maximum blood THC concentrations occur within minutes of dosing and reach the maximum while a cannabis cigarette is still being smoked." I won't read the whole thing. This is the sort of evidence they were able to bring to us, because, again and again, Mr Mitchell has talked about those who have come before us who believe that cannabis should somehow be exempted or that it doesn't make any difference. It's also very important to remember that within this, the substances, the six most prevalent impairing drugs which will be able to be tested for are THC, obviously; methamphetamine; benzodiazepines; MDMA, better known as ecstasy; opiates; and cocaine. Of course, these—and I know it's quite interesting. In police, the surveillance squads who follow drivers are ones who have a lot of expertise in this area, because they know pretty much what those they are trying to surveil—what sort of drug they are likely to be on by the degree of impairment. Again, it's important to remember this is about degree of impairment.