DENVER (AP) - A bill to set a blood-content threshold to charge marijuana users with driving under the influence is advancing in the Colorado House.
Lawmakers there approved the proposal on a voice vote Tuesday after debate over whether 5 nanograms per milliliter was a reasonable level for a DUI offense.
Ohio and Nevada have a 2 nanogram limit and 12 states have zero tolerance laws for driving under the influence of an illegal drug.
Democratic Rep. Claire Levy tried to set the limit at 8 nanograms to ease concerns from medical marijuana advocates who say daily users of the drug develop a tolerance that may allow them to drive safely and would be unfairly punished with a 5 nanogram limit. Levy's amendment was rejected.
The bill faces a final vote in the House before it can advance to the Senate.
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