Interestingly we have a standard for alcohol or a level of impairment threshold. 
Aside from all debate about the validity of that level, there doesn't appear to be any impairment threshold in the new test - they only need to detect usage. 
(Anybody have any better info ?)
So if you smoke a joint, quite legally in the Netherlands, Spain, Colorado or Alaska, and then get stopped in New Zeaalnd a week later you may in trouble.
While you are not impaired (unless it was a very good smoke) THC is detectable for months as it is fat soluble.
				
			 
			
		 
			
				
			
			
				David must play fair with the other kids, even the idiots.
			
			
		 
	
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