According to the state policies, DUI laws in Arizona prohibit the following:
Driving under the influence of any drug if the person is impaired “to the slightest degree”
Driving while any amounts of certain drugs are present in the person’s system, including marijuana
The DUI laws also state that patients who test positive for a prescribed drug or drugs are not subject to prosecution under the Zero Tolerance Law.
Marijuana Laws In Arizona
Looking at the overall reputation of the state, Arizona is one of the three states that has both a zero-tolerance driving policy for pot and has a law which legalizes the sale, possession, and use of medical marijuana.
Even if a person admits to smoking a small amount of pot before driving, it is still reasonable to ask whether his or her level of impairment is comparable to a 0.08% legal blood alcohol concentration level. Since Arizona is a zero-tolerance state, even the slightest hint of pot residue in the driver’s blood, including those of card-holding patients, is considered a crime and anyone riding high commits a legal foul.
Proving Fault
In Arizona, the state must prove that the person had some amount of metabolites in their system in order to convict an individual for a marijuana DUI under the Zero Tolerance Law.
The person may then offer evidence as defense in order to rebut the presumption that those metabolites caused impairment.