Associated Press

LANSING - 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.

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

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.