May 21, 2013 11:35 AM by Patricia Collier
DENVER (AP) - A stoned-driving bill awaiting the Colorado governor's signature is being challenged by a northern Colorado man who wants to block the measure.
Brandon Baker of Nunn says he uses marijuana for religious reasons and that the blood limit at which drivers would be considered impaired is too low for frequent users.
Baker planned to file his lawsuit Tuesday in federal court in Denver.
Some users have higher blood levels of THC, the drug ingredient in pot. The bill does allow people to argue they were sober at the stated limit.
Democratic Gov. John Hickenlooper has long advocated for a marijuana driving standard and is expected to sign it into law next week.
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