Hon MICHAEL WOODHOUSE: I did pass, you'll be pleased to know, Mr van de Molen, and we went on a discussion about why this was all necessary, because there were emerging technologies at that time which showed—saliva testing. We knew that the illicit ingestion of substances was illegal, but we wanted to make this very much a road safety issue, not a criminal issue. What we heard at that time was that the saliva-testing regime—the measurement of the degree of impairment at that time, that was 13 years ago, was not as specific, sensitive, and there wasn't a sufficient correlation between the degree of, say, THC in one's system and the level of impairment. One could smoke a joint the night before, wake up relatively clear-eyed, but still have that in the system. That contrasts with blood alcohol and breath alcohol, where there is a high correlation between the amount of alcohol in the system and the level of impairment. And that was our difficulty. 