ATF Unlawful User Definition: Regularity, Recency, and Marijuana

The ATF’s definition of an unlawful user of a controlled substance changed in January 2026. Under the revised regulation at 27 CFR 478.11, an unlawful user is a person who “regularly uses a controlled substance over an extended period of time continuing into the present, without a lawful prescription or in a manner substantially different from that prescribed by a licensed physician.”¹ The old bright-line examples — a drug conviction in the past year, multiple arrests, a failed drug test within twelve months — are gone. In their place is a two-part, case-by-case test: the drug use must show both regularity and recency sufficient to indicate the person is “actively engaged” in the conduct.

The definition matters because it fills in one of the categories of “prohibited person” under 18 U.S.C. § 922(g)(3), which bars anyone who is an unlawful user of, or addicted to, any controlled substance from possessing a firearm or ammunition.² “Controlled substance” pulls from the Controlled Substances Act and covers everything on federal Schedules I through V, including prescription opioids and benzodiazepines when used outside a valid prescription. Alcohol and tobacco are excluded.³

What Changed in January 2026

Before the interim final rule took effect, the ATF’s regulation offered specific triggers that examiners could point to. A conviction for use or possession of a controlled substance within the past year was enough. So was a positive drug test within the past year, or a pattern of multiple drug arrests within five years with the most recent inside a year. Any one of those effectively answered the question.

Those examples have been removed.¹ The rule now asks examiners and prosecutors to look at the full picture and decide whether the evidence shows use with “sufficient regularity and recency to indicate that the individual is actively engaged in such conduct.”

For you as a reader trying to figure out where you stand, this cuts two ways. A single incident — one conviction, one positive test, one admission — no longer functions as an automatic disqualifier. But the old twelve-month clock that at least gave people a rough sense of when they were clear is no longer written into the regulation. There is no codified waiting period.

What “Regularity” Means

Regularity is the pattern half of the test. The government has to show that the drug use was not a one-off. The rule explicitly says a person is not an unlawful user if the drug use “is isolated or sporadic or does not otherwise demonstrate a pattern of ongoing use.”¹

How often and over what stretch of time? That gets decided case by case. Someone who used marijuana every weekend for six months looks different from someone who tried a substance once at a party. A single positive drug test, without more, is rarely enough on its own. Prosecutors typically build the regularity showing from stacked evidence: repeated positive tests, multiple arrests, admissions, or witness accounts of habitual use.

What “Recency” Means

Recency asks whether the use is close enough in time to indicate the person is still doing it. The statute is not a lifetime disqualifier for anyone who ever used drugs. If you genuinely stopped, you are no longer prohibited.

The rule is careful on both edges. It says unlawful use is “not limited to using a controlled substance on a particular day, or within a matter of days” before a firearm is possessed — so you cannot beat the standard by simply staying clean the morning of a purchase.¹ At the same time, evidence of use from years ago paired with nothing recent usually cannot carry the recency element.

The removed twelve-month benchmark still shapes how many examiners and federal prosecutors think about recency, even though it no longer appears in the regulation. Something in the last year gets attention. Older material has to be paired with current indicators to matter.

The “Addicted To” Prong

Section 922(g)(3) contains a second category alongside unlawful user: a person “addicted to” a controlled substance. The 2026 rule defines this separately. A person is addicted if they use a controlled substance and “demonstrate a pattern of compulsively using the controlled substance, characterized by impaired control over use.”¹ In theory this can reach someone who has a valid prescription but is using compulsively; in practice it is charged far less often than the unlawful-user prong.

Marijuana Under the Definition

For most people the definition matters is because of marijuana. It remains a Schedule I controlled substance under federal law as of 2026. The DEA published a proposed rule in 2024 to reschedule marijuana to Schedule III, and a hearing on that proposal is scheduled to begin in late June 2026, but no final rule has taken effect.⁴

The ATF has been explicit that use in a state that has legalized marijuana “is still considered illegal by federal law.”⁵ A resident of a fully recreational state who uses marijuana regularly still meets the definition of an unlawful user and cannot legally possess a firearm.

A rescheduling to Schedule III would not automatically fix things for recreational users. Schedule III drugs are still controlled substances, and using them without a prescription would still be unlawful. Any effect on § 922(g)(3) would depend on how regulators and courts interpret the change.

Medical Marijuana Cards

Holding a state-issued medical marijuana card is a specific problem. ATF Form 4473 asks whether the buyer is “an unlawful user of, or addicted to, marijuana or any depressant, stimulant, narcotic drug, or any other controlled substance” and prints a warning directly on the form that marijuana use “remains unlawful under Federal law regardless of whether it has been legalized or decriminalized for medicinal or recreational purposes in the state where you reside.”⁶ The card itself is government-issued documentation of a relationship with a federally prohibited substance.

Caregivers and Growers

State-licensed caregivers or growers who do not personally consume marijuana are generally not prohibited on that basis alone. FBI guidance treats a handler’s card as insufficient without evidence of actual use. The definition requires use, not proximity.

What Evidence Examiners Rely On

No single item is automatically disqualifying under the 2026 rule, but some carry more weight than others when NICS examiners or federal prosecutors build a case.

A “yes” answer to the drug-use question on Form 4473. This is the most direct trigger because the buyer has stated the fact under penalty of perjury.⁶
A recent conviction for use or possession of a controlled substance, especially when other indicators show a pattern.
Positive drug tests from employment screening, probation, or military testing that pin down use within a specific window.
Multiple drug arrests, even without convictions, when they form a picture of ongoing use.
Military disciplinary actions, non-judicial punishment, or administrative discharges based on confirmed drug use, for current or former service members.

Lying about drug use on Form 4473 is itself a federal crime, separate from the underlying prohibited-person question. False statements in connection with a firearm acquisition carry up to ten years under 18 U.S.C. § 924.⁷

When You Stop Being an Unlawful User

The 2026 rule says a person is no longer an unlawful user once they have “ceased regularly unlawfully using the substance.”¹ There is no set number of months or years of sobriety written into the regulation. The examiner looks at the totality of the evidence and decides whether the person is still actively engaged in use.

The lack of a bright line cuts both ways. If you have genuinely stopped, you do not have to wait out an arbitrary clock. But there is no guaranteed safe harbor either — a serious pattern of past use may take more time and more documentation to overcome. Completion of a drug treatment program, a run of clean drug tests, or dismissal of charges through a pretrial diversion or drug court program all help support a claim that the conduct has ended.

If NICS Denies You Based on Drug Use

You have the right to appeal a NICS denial. The process runs through the FBI’s Appeal Services Team.

Submit a written request by mail, fax, or online at fbi.gov/nics-appeals. Include your full name, mailing address, and your NICS or State Transaction Number. The FBI cannot give reasons by phone due to the Privacy Act.
The Appeal Services Team responds within five business days with the general reason for the denial.
If the record is wrong, submit documentation: court records showing dismissal, proof of completed diversion, or evidence of misidentification. Fingerprints rolled by law enforcement can resolve identity mix-ups.
Appeals are worked in the order received; no published resolution timeline. If the FBI cannot resolve it, you are referred to the agency that maintains the underlying record.⁸

If the appeal succeeds, the FBI issues documentation confirming eligibility, which you take back to the dealer who initiated the check.

1
Federal Register. Revising Definition of Unlawful User of or Addicted to Controlled Substance
2
Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts
3
Office of the Law Revision Counsel. 21 USC 802 – Definitions
4
Federal Register. Schedules of Controlled Substances – Rescheduling of Marijuana
5
Bureau of Alcohol, Tobacco, Firearms and Explosives. Drug Policy
6
Bureau of Alcohol, Tobacco, Firearms and Explosives. ATF Form 4473 – Firearms Transaction Record
7
Office of the Law Revision Counsel. 18 USC 924 – Penalties
8
Federal Bureau of Investigation. NICS Guide for Appealing a Firearm Transfer