In the United States, two layers of law operate at the same time. The federal Controlled Substances Act places psilocybin and psilocin in Schedule I, and as of June 2026 that has not changed. [1] primary-legal 21 U.S.C. § 812 — Schedules of controlled substances Link → Underneath that federal floor, individual states have built their own decriminalization and supervised-access frameworks. [2] primary-legal Oregon Psilocybin Services (Ballot Measure 109; ORS Chapter 475A) Link → [3] primary-legal Proposition 122, Natural Medicine Health Act; implementing Senate Bill 23-290 (2023) Link → The two layers do not merge: a state can decline to penalize conduct under its own law and create a regulated programme, but it cannot repeal federal law. So conduct can be permitted by a state programme and still be a federal offence at the same moment. The federal status itself rests on an international treaty backdrop. [4] primary-legal Convention on Psychotropic Substances, 1971 Link → “Decriminalized locally” and “legal under a state programme” are not the same as “legal” — the federal offence persists regardless.
This is not legal advice; consult a qualified attorney licensed in your jurisdiction. The interaction of federal and state law is fact-specific and cannot be resolved by a general page.
A structural explanation, not guidance. This article explains how the two layers relate. It does not advise on possession, participation in any programme, travel, or how the law applies to your circumstances.
The federal floor
Federal drug law classifies controlled substances into schedules. Schedule I is the most restrictive: it is used for substances the statute treats as having no currently accepted medical use and a high potential for abuse, and psilocybin and psilocin sit within it. [1] primary-legal 21 U.S.C. § 812 — Schedules of controlled substances Link → Two consequences follow at the federal level: the substances cannot be prescribed, and lawful handling for research requires a federal registration. This is the floor on which everything else rests, and it has not moved as of June 2026.
That federal classification is not purely a domestic choice. It implements obligations under the 1971 United Nations Convention on Psychotropic Substances, which lists psilocybin internationally. [4] primary-legal Convention on Psychotropic Substances, 1971 Link → The treaty backdrop is part of why the federal floor has been slow and complicated to change, a point developed in the international overview.
The state layer sits underneath, not on top
States have acted within their own authority, but underneath the federal floor rather than above it. Oregon’s Measure 109 created a regulated psilocybin-services programme, [2] primary-legal Oregon Psilocybin Services (Ballot Measure 109; ORS Chapter 475A) Link → and Colorado’s Proposition 122, implemented by Senate Bill 23-290, both decriminalized personal possession of certain natural psychedelics and directed a supervised-access programme. [3] primary-legal Proposition 122, Natural Medicine Health Act; implementing Senate Bill 23-290 (2023) Link → These operate under state law. What they do not do is erase the federal offence. A state can choose not to use its own police and prosecutors against certain conduct, and it can license activity under state rules, but it cannot legislate federal prohibition out of existence.
| Federal law | State law | |
|---|---|---|
| Sets Schedule I status of psilocybin | Yes | No |
| Can create a state-regulated programme | No | Yes |
| Can remove the federal offence | — | No |
| Can decline to penalise under its own law | — | Yes |
| Binds the other layer | No | No |
Why “decriminalized locally” is not “legal”
The phrase that causes the most confusion is “it’s legal here.” A city decriminalizing possession, or a state running a supervised programme, changes that jurisdiction’s treatment of the conduct. It does not change the fact that the same conduct can remain a federal offence. The two facts coexist. This is the same structural situation that has long applied to state cannabis programmes: lawful under state law, still federally controlled. Treating a local reform as a blanket “legal” reads one layer and ignores the other. A state licence or a local decriminalization policy is permission under that jurisdiction’s own law; it is not immunity from federal law unless a specific federal provision says so.
Enforcement posture is not the same as legality
People sometimes reason from enforcement: if the federal government is not prosecuting personal use in a programme state, the conduct must effectively be legal. This conflates two different things. Enforcement priorities are policy choices that can shift with administrations and written guidance, and this resource does not predict them. The federal offence exists independently of whether and how it is enforced at a given time. Reading current enforcement posture as a durable legal permission is exactly the kind of inference this cluster cautions against; how to avoid it is the subject of how to read legal claims.
What this does and does not tell you
Understanding the two-layer structure tells you how to read a headline accurately. It does not tell you what is lawful for you to do, which depends on specific facts, your jurisdiction, and a qualified attorney’s analysis. And it tells you nothing about safety or efficacy: the existence of a state programme is a policy decision, not a finding that microdosing works — see legality is not safety or efficacy and the safety overview.
- Two layers at once
- Federal and state law operate simultaneously; neither cancels the other. [1] primary-legal 21 U.S.C. § 812 — Schedules of controlled substances Link →
- States act underneath the floor
- A state can build a programme and decline to penalise conduct, but cannot repeal the federal offence. [3] primary-legal Proposition 122, Natural Medicine Health Act; implementing Senate Bill 23-290 (2023) Link →
- Treaty backdrop
- Federal scheduling implements an international convention, constraining purely domestic reform. [4] primary-legal Convention on Psychotropic Substances, 1971 Link →
- Enforcement ≠ legality
- A current decision not to prosecute is not the same as the conduct being lawful.
Frequently asked questions
What is Schedule I and why is psilocybin in it?
Schedule I is the most restrictive category of the federal Controlled Substances Act, used for substances the law treats as having no currently accepted medical use and a high potential for abuse. Psilocybin and psilocin were placed there and, as of June 2026, remain there. [1] primary-legal 21 U.S.C. § 812 — Schedules of controlled substances Link → The classification controls how the substances are handled at the federal level, including that they cannot be prescribed and may be studied only under a federal research registration. The label is a regulatory category, not a scientific conclusion about danger or worthlessness.
If my state has a psilocybin programme, is it legal for me?
A state programme makes certain conduct lawful under that state’s law; it does not change federal law, under which psilocybin remains a Schedule I controlled substance. [2] primary-legal Oregon Psilocybin Services (Ballot Measure 109; ORS Chapter 475A) Link → The two layers operate at the same time, which means conduct can be permitted by a state programme and still be a federal offence. What this means for any individual is a legal question that depends on specific facts and is for a qualified attorney, not a webpage, to answer.
Can a state legalize something that is federally illegal?
A state can choose not to penalize conduct under its own law and can build its own regulated programme, but it cannot repeal or override federal law. [3] primary-legal Proposition 122, Natural Medicine Health Act; implementing Senate Bill 23-290 (2023) Link → This is why cannabis and psilocybin programmes are described as operating under state law despite continuing federal prohibition. The relationship between the layers is shaped by constitutional principles and federal enforcement priorities, which can shift, rather than by the state having erased the federal offence.
Where does international law fit in?
United States federal scheduling of psilocybin implements obligations under the 1971 United Nations Convention on Psychotropic Substances, which lists these substances internationally. [4] primary-legal Convention on Psychotropic Substances, 1971 Link → That treaty backdrop is part of why federal status has been slow to change and why purely domestic reform is constrained. It is context for understanding the federal floor, not a separate set of rules that applies to individuals directly.
Does federal enforcement actually target personal use in programme states?
Enforcement priorities are a policy matter that can change with administrations and guidance, and this page does not predict them. The point that matters for reading the law is structural: the federal offence continues to exist regardless of state programmes or current enforcement posture. Relying on an assumption about enforcement is not the same as the conduct being lawful, and predicting enforcement is outside what this educational resource can responsibly do.