Unfortunately, I missed that part of his testimony. It was pouring rain out there and I decided to wait for it to break.
What they said is not what I've been hearing from the Drugs and Driving Committee over the last several years, or what you've heard. The equipment is becoming more and more reliable at detecting it at lower and lower thresholds in saliva. I don't think there's any question about that, but the question of how that is connected with the level in your blood and impairment isn't as clear.
There is a particular legal problem, perhaps, that we haven't explored. One of the reasons approved screening devices are acceptable is that evidence isn't used against you in court. If you have presence in your oral fluid, it's sufficient to create the offence. You're requiring the person right there at the side of the road to provide you with proof that they have it in their system. That is self-incriminating. Obviously in Australia they then take another one and send it to a laboratory to be analyzed.
Our understanding of the state of the science is that it is not that good at this stage. We rely on the Drugs and Driving Committee for its advice.