Zero Tolerance Driving Policy for Cannabis Struck Down by Arizona Supreme Court

By Associated Press

Authorities can’t prosecute Arizona motorists for driving under the influence of marijuana unless the person is impaired at the time of the stop, the state Supreme Court ruled Tuesdaygavel in the latest opinion on an issue that several states have grappled with across the nation.

The ruling overturned a state Court of Appeals decision last year that upheld the right of authorities to prosecute pot smokers for DUI even when there is no evidence of impairment.

The opinion focuses on two chemical compounds in marijuana that show up in blood and urine tests — one that causes impairment and one that doesn’t but stays in a pot user’s system for weeks.

Read moreZero Tolerance Driving Policy for Cannabis Struck Down by Arizona Supreme Court