Utahns who drive to Colorado for legal pot are in for a drag when they get back: The moment they re-enter state boundaries, they’re probably breaking the law.
Sober or not.
Under a Utah law popularly known as the “metabolite statute,” drivers may not operate a vehicle with a controlled substance in their system, and a component of tetrahydrocannabinol (THC) can be detected in blood and urine for days and even weeks after ingesting marijuana. The state lab indicates on toxicology reports that the inactive THC metabolite “has no pharmacological activity,” but that doesn’t rate: The prosecution isn’t required to prove that a driver was influenced by the drug.