Thank you.
Mr. Wood, thank you for your very troubling testimony today. You have testified that the per se levels approach to cannabis, the two nanograms per millilitre or the five, are, I think in both cases, you've suggested, simply not going to do the job, based on the experience of your research in Colorado. You pointed out that if someone has less than the per se limit, they will no doubt be found innocent, even though someone may have been affected, unless of course they were found impaired through field sobriety or some other measure, because they will not have violated the per se limits.
I'd like, therefore, to explore your recommendations with you further. You talked about tandem per se limits a moment ago. I'd like you to spend a little more time explaining how that might work in practice.
Of course, you distinguished, I think properly, between heavy users and occasional users. Some of the heavy users will have a level of cannabis in their system that will last for a long time. To your question about those who have less than the per se limits in their system, does that mean your ultimate recommendation is that they be banned permanently from driving? Is that the implication of what you're saying?