Quote Originally Posted by HighPopalorum
Exactly. This is what we need for pot as well: bright lines that both sides rely on. Below X you're ok, above X you're screwed, above Y you're really screwed. What those limits should be and the method of testing I leave entirely up to others.
If the scientific basis is accurate, meaning that if THC content at level x really does mean you're ripped and shouldn't be driving, and not "well, you might be ripped, or you might just be a pothead who smokes an oz a week but hasn't smoked in 8 hours, but since we can't tell the difference we'll charge you and shift the burden of proving you weren't impaired to you" I guess I would be ok with concentration level x being the trigger for a rebuttable presumption that a driver is impaired. If it really is the latter though, not so much,as Borat would say.