Public spaces
You can possess up to 2.5 oz of flower (or 15 g of concentrate) for personal use, including in public spaces. You cannot consume in public — that includes sidewalks, parks, streets, vehicles, and dispensary parking lots. Consumption is restricted to private property where the owner permits.
Driving with cannabis
You can transport cannabis in a vehicle in its original sealed packaging, stored in a place not accessible to the driver while operating the vehicle. Operating any motor vehicle while under the influence of cannabis is illegal. Michigan enforces a zero-tolerance approach for active impairment; field sobriety testing and blood draws are admissible.
Employment
Michigan employers can still maintain drug-free workplace policies and test for cannabis. Adult-use legalization does NOT protect employees from termination based on positive cannabis tests. Medical cannabis patients have slightly more protection in some cases, but the right to consume cannabis outside of work hours does not preempt employer drug-testing policies.
Housing
Landlords can prohibit cannabis use in rental units even where state law permits. Read your lease. Many leases now include cannabis clauses. Smoke restrictions are nearly universal in multi-unit housing. Edibles and vape use are often permitted where smoking is not.
Cannabis and federal land or border
Federal law still classifies cannabis as a Schedule I controlled substance. National parks, federal courthouses, military bases, airports, and the Blue Water Bridge border crossing into Ontario all enforce federal law — cannabis is illegal on those properties regardless of state law. Do not attempt to cross the bridge with cannabis.
- MCL 333.27955 — Authorized conduct (possession, transport, consumption limits) — Michigan Legislature
- Michigan Department of Civil Rights — official site — Michigan Department of Civil Rights
- U.S. Customs and Border Protection — Cannabis at international borders — U.S. Customs and Border Protection