Cannabis Laws in Arizona

Not legal advice

This article is informational only and is not legal advice. Cannabis laws change frequently and enforcement varies by county and municipality. Cannabis remains a Schedule I controlled substance under U.S. federal law, which matters on federal land, in federal employment, and for firearms purchases. Consult a licensed Arizona attorney for any specific situation. Information last verified: June 2024.

How Arizona got here

Arizona voters approved the Arizona Medical Marijuana Act (AMMA) as Proposition 203 in November 2010, creating a regulated medical program under the Arizona Department of Health Services ^[1]. An adult-use legalization measure (Prop 205) failed in 2016. Four years later, voters passed Proposition 207, the Smart and Safe Arizona Act, by roughly 60% to 40% on November 3, 2020 ^[2]. Adult-use sales began at existing medical dispensaries on January 22, 2021, one of the fastest rollouts of any U.S. legalization measure ^[3]. Strong evidence

What adults 21+ can do

Under A.R.S. § 36-2852, adults 21 and older may:

• Possess up to 1 ounce of cannabis, of which no more than 5 grams may be concentrate (hash, oil, rosin, etc.) ^[4].
• Cultivate up to 6 plants at their primary residence, with a maximum of 12 plants per household when two or more adults live together. Plants must be in an enclosed, locked area not visible from public view ^[4].
• Purchase from a licensed dispensary or 'marijuana establishment.'
• Gift up to 1 ounce to another adult 21+ without compensation.

Possession of between 1 and 2.5 ounces by an adult is a petty offense (civil-style citation) rather than a criminal charge. Above 2.5 ounces, criminal penalties apply ^[4]. Strong evidence

Public consumption — including smoking and vaping in public places — is prohibited and carries a petty offense penalty. Open containers in vehicles are also barred.

Medical program (AMMA)

Arizona's medical program predates legalization and still offers advantages worth keeping. Registered qualifying patients:

• Can possess up to 2.5 ounces of usable cannabis per 14-day period ^[1].
• Pay only the standard state sales tax — they are exempt from the 16% excise tax that applies to adult-use sales ^[2].
• Can be 18+ (minors qualify with a designated caregiver and additional physician certifications).
• Qualifying conditions include cancer, glaucoma, HIV/AIDS, hepatitis C, ALS, Crohn's disease, Alzheimer's, PTSD, and any chronic or debilitating condition causing severe pain, nausea, seizures, or muscle spasms ^[1].

Cards are issued by ADHS and currently valid for two years. Out-of-state medical cards are recognized for possession but not for purchase from Arizona dispensaries.

DUI and driving

This is where people get hurt. Arizona historically had one of the strictest cannabis DUI statutes in the country: A.R.S. § 28-1381(A)(3) made it a crime to drive with any amount of a prohibited drug or its metabolite in the body. In 2014, the Arizona Supreme Court in State ex rel. Montgomery v. Harris ruled that the inactive carboxy-THC metabolite (which can linger for weeks) does not support a DUI charge — only hydroxy-THC or active delta-9 THC do ^[5]. Strong evidence

Prop 207 added that a registered qualifying patient or adult may not be convicted of DUI based solely on metabolite concentration without other evidence of impairment, but active THC plus any evidence of impaired driving is still prosecutable ^[4]. There is no numeric per se THC blood limit in Arizona — prosecutors argue impairment case by case. Driving high is a meaningful legal risk.

Expungement and past convictions

Prop 207 created Arizona's first true cannabis expungement pathway. Beginning July 12, 2021, individuals could petition courts to expunge records for: possessing, consuming, or transporting 2.5 ounces or less (with up to 12.5 g of concentrate); possessing/cultivating up to 6 plants at a primary residence; and possessing paraphernalia for personal use ^[4][6]. Expungement is not automatic — petitioners must file in the court where the conviction occurred. Tens of thousands of petitions have been processed since ^[6]. Strong evidence

Where legal still isn't legal

Several scenarios remain criminal or carry serious civil consequences:

• Federal land: National parks, national forests, tribal lands, military bases, and post offices are federal jurisdictions. Roughly 38% of Arizona's land area is federally managed ^[7]. Cannabis possession there violates federal law regardless of state status.
• Tribal nations: Each tribe sets its own policy. Some Arizona tribes (e.g., Ak-Chin, San Carlos Apache) have opened or partnered on dispensaries; most have not.
• Workplaces: A.R.S. § 23-493.06 and Prop 207 both preserve employers' rights to maintain drug-free workplace policies and to act on positive tests, even for off-duty use ^[4]. Medical patients have some additional protections but are not shielded from safety-sensitive position rules.
• Firearms: ATF Form 4473 still asks about unlawful use of a controlled substance, and cannabis use — even state-legal — is a disqualifying answer under federal law ^[8].
• Landlords and HOAs: Can prohibit smoking and cultivation on their property.
• Hemp and Delta-8: Arizona's hemp law (Title 3, Chapter 17) aligns with the 2018 federal Farm Bill, but ADHS has taken the position that intoxicating hemp-derived cannabinoids fall under the marijuana definition and require dispensary licensing. Enforcement has been inconsistent ^[9]. Disputed

Taxes, licensing, and the market

Adult-use sales carry a 16% excise tax plus state and local transaction privilege taxes (typically 5.6%–11% combined) ^[4]. Excise revenue is allocated to community colleges, public safety, public health, and the justice reinvestment fund.

Dispensary licensing was initially limited: existing medical dispensaries got first crack at dual licenses, plus a 'social equity' program issued 26 additional licenses in 2022. The social equity rollout has been heavily criticized for predatory investor takeovers of qualifying applicants ^[10]. Strong evidence Total Arizona cannabis sales exceeded $1.4 billion in 2022 before softening in 2023 along with most mature U.S. markets ^[11].

Sources

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