You mentioned safety sensitive positions, but I've heard concerns about people even in such positions as operating forklifts, taxis, school buses. What my colleague was saying about intoxication was that with alcohol, breathalyzers are inexpensive and you get a really quick result with them, but for cannabis, right now there's no real framework. Even the swab tests that are yes or no will only tell whether it's in the blood. Then you have to get a blood test for intoxication levels.
I was wondering, then, what is going to have to be done differently in the workplaces, especially those that require operation of heavy machinery? What will they have to do differently to ensure the safety of employees?