PHOENIX (AP) — The Arizona Supreme Court has ruled that the presence of non-impairing marijuana compounds detected in a person's body does not give authorities the right to prosecute under Arizona's driving under the influence laws.

Last year, the state Court of Appeals upheld the right of authorities to prosecute pot users for DUI even when there is no evidence of impairment.

The Supreme Court opinion released Tuesday notes that while Arizona statute makes it illegal for a driver to be impaired by marijuana use, the presence of a non-psychoactive compound does not constitute impairment under the law.

The opinion focuses on two chemical compounds in marijuana that show up in blood and urine tests — one that causes impairment and one that stays in the system for weeks but doesn't cause impairment.




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