No, you're mistaken. The TTC policy, as I mentioned before, addresses that issue. There is a medical consensus on what impairment is. They've doubled that consensus and have said that anything below that is a negative test. There would thus be a negative test for somebody who smoked up at a Saturday night party and went to work on Friday. They would test positive, but below a threshold at which they'd be identified as positive. In other words, they'd test negative. The test is for impairment, and that's what we want, I think, to keep people safe.
On September 14th, 2017. See this statement in context.