What Happened?

If you run a cannabis business or want to invest in one, the rules you have to follow may depend entirely on which state you're in and which federal court covers it. Three federal appeals courts have reached conflicting conclusions about whether state marijuana licensing laws violate the U.S. Constitution, according to a recent Congressional Research Service (CRS) report, the nonpartisan agency that provides legal and policy analysis to Congress.

The conflict centers on a constitutional principle called the Dormant Commerce Clause, an implied limit on state power derived from the part of the Constitution that gives Congress authority over interstate trade. The question is whether that principle applies to a market, marijuana, that Congress has made a federal crime.

Why Does it Matter to Me?

Most states have legalized some form of marijuana, but every recreational program in the country remains illegal under federal law.

Many states favor their own residents when handing out marijuana licenses. Some require applicants to have lived in the state for a set period. Others give priority to people with prior marijuana convictions under that state's laws. Those rules can block out-of-state investors and business operators entirely.

Whether those rules are legal now depends on where you are:

  • In states covered by the Second Circuit, a New York licensing program was found likely to violate the Constitution in a preliminary ruling.
  • In states covered by the First Circuit, Maine's residency requirement for dispensary officers and directors was struck down.
  • In states covered by the Ninth Circuit, those same types of rules may stand, because that court ruled the constitutional limit does not apply to markets Congress has banned.

Both Sides,Now

The courts themselves are divided, and that division reflects a genuine legal disagreement. The Second and First Circuits reasoned that Congress banning a market is not the same as Congress approving state protectionism within it. The Second Circuit warned that letting states favor their own residents could distort a national market if Congress ever legalizes marijuana. The First Circuit pointed to repeated congressional budget riders that bar the Justice Department from interfering with state medical marijuana programs as evidence Congress already recognizes an interstate market exists.

The Ninth Circuit disagreed. It ruled unanimously that the Dormant Commerce Clause exists to protect national markets for legal goods and services, and that protection simply does not extend to a market Congress has prohibited. The court cited Supreme Court guidance that the doctrine should be applied with "extreme caution and extreme delicacy."

A Department of Justice order in April 2026 rescheduled marijuana under federal drug law, creating a narrow accommodation for certain medical marijuana products. No marijuana-derived products currently qualify for that accommodation, so the practical effect on the legal dispute remains limited.

What Happens Next?

The circuit split remains unresolved. The Supreme Court has not agreed to hear the question, and no congressional vote to legalize or regulate interstate cannabis commerce is scheduled. If Congress were to directly authorize or prohibit interstate marijuana commerce, it would override the constitutional dispute entirely. Until then, cannabis businesses and investors face different legal rules depending on which federal circuit covers their state, with no clear resolution on the horizon.

---

Spot something wrong? Report an issue with this article