LANSING, Mich. (AP) – A bill advancing in Michigan’s Legislature may set the stage for setting a legal limit for driving under the influence of marijuana.

The House voted 107-1 Tuesday to create a commission to research and recommend a threshold of THC bodily content that would constitute evidence of impaired driving. THC is the component of marijuana responsible for the drug’s effects.

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Unlike other Schedule 1 drugs, THC can be detected in the body long after it no longer affects someone’s driving ability.

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Michigan’s law legalizing marijuana use for medical purposes shields patients from prosecution for drugged driving as long as they aren’t “under the influence” of marijuana. Legislators hope to define a limit similarly to how there’s a bodily alcohol content of 0.08.

[House Bill 5024]

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