“To my knowledge, there isn’t (yet) any objective test that can ascertain this insofar as “marijuana impairment” is concerned.”
Actually, there is. And unfortunately the ‘pee in the bottle’ industry has done a wonderful job of discrediting it, since it impacts their profits.
The basic problem with testing urine, is that the drug has to leave behind a marker, and the test has to look for it. A drug that doesn’t leave a marker, or a test that doesn’t look for that marker - means someone bombed out of their head walks free. This actually happened to a friend of mine at his business.
A guy that they KNEW was on something, kept passing the drug test. As he was a minority, my friend’s lawyer warned him that terminating the guy after he passed the test was all but impossible. In desperation found, and I later used in a business that I ran, something called the “quick eye” system.
It is a simple way to test the person’s abilities for their eyes to follow an object. And if you can’t - you ARE on something. Several states were letting the police use it during stops. This was back in the ‘90s. Soon the ‘pee in the bottle’ companies felt threatened (or at least their profits threatened) and went on a rampage about how inaccurate it was.
I don’t believe there was any scientific evidence (except for what they paid for) that showed it didn’t work. I can tell you from first hand experience it worked perfectly for us on two occasions.
Are you suggesting the paraplegic cubicle worker was smoking on the job while in his cubicle? If not, how would this test work?