Murray‑Hall v Quebec (Attorney General)
Murray-Hall v. Quebec (Attorney General) is a 2023 Supreme Court of Canada case about how provinces can regulate cannabis after Canada legalized it.
What happened
- Janick Murray-Hall challenged sections 5 and 10 of Quebec’s Cannabis Regulation Act, which prohibit possessing cannabis plants and cultivating them at home.
- Murray-Hall argued these rules were beyond provincial power (criminal law) or invalid because federal law would override them.
The key questions
- Are Quebec’s sections 5 and 10 valid provincial laws, or are they ultra vires (outside provincial power) because they touch criminal law?
- Does federal law (the Cannabis Act) override or frustrate Quebec’s rules under federal paramountcy?
The ruling
- The appeal was dismissed; the Quebec provisions were upheld as valid provincial law.
- The Court recognized the double aspect doctrine: even after federal legalization, both levels of government can regulate the same substance for different purposes.
- Quebec’s rules fit under provincial powers over health, safety, and the regulation of property and civil rights, including the state monopoly on cannabis distribution.
- The federal Cannabis Act’s decriminalization does not create positive rights or frustrate the provincial scheme. There is no operational conflict between the federal and provincial laws.
Why it matters
- The decision clarifies how provinces can regulate cannabis production, distribution, and sale even after federal legalization.
- It shows that provincial public health and safety aims can justify restrictions on home cultivation and possession within the province’s jurisdiction.
This page was last edited on 3 February 2026, at 16:50 (CET).