"When a person is suspected of driving under the influence of marijuana in Wisconsin, blood is tested for a metabolite called delta-9-tetrahydrocannabinol (delta-9-THC), the substance found in marijuana known to cause impairment or impaired perceptions.
"But Wisconsin does not require proof of 'impairment' to convict for driving under the influence of marijuana. All that is required is a detectable amount of delta-9-THC. This 'zero-tolerance' law allows individuals to be convicted with very small but detectable amounts."
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Wednesday, September 23, 2015
What is the Law on Driving Under the Influence of Marijuana in Wisconsin?
Joe Forward at Inside Track,