Marijuana
MCL 333.27955 — what a person 21 or older may have, and where the act stops
For a person 21 or older, the act says possessing, using, buying and transporting 2.5 ounces or less of marijuana is not unlawful, with not more than 15 grams of it as concentrate. At home, a person may keep up to 10 ounces and whatever is grown there, and cultivate up to 12 plants, with no more than 12 plants on the premises at once.
Giving away up to 2.5 ounces, with the same concentrate limit, to another person 21 or older is covered, as long as nothing is received for it and the transfer is not advertised or promoted to the public. More than 2.5 ounces at home has to be kept in a container or area with locks or other security.
The act does not authorize any of the following:
- Operating or being in physical control of a vehicle, boat, snowmobile or aircraft while under the influence.
- Consuming while operating one, or smoking in the passenger area of a vehicle on a public way.
- Consuming in a public place, or smoking where the owner or manager of the property prohibits it.
- Anyone under 21 possessing, buying or growing it, and any transfer to a person under 21.
- Plants visible from a public place without optical aids, or grown outside a locked or secured area.
- Possession on the grounds of a school for preschool through grade 12, in a school bus, or at a correctional facility.
Holding up to twice the allowed amount, where the act does not otherwise authorize it, is a civil infraction with a fine of not more than $500 for a first violation and $1,000 for a second, and a misdemeanor with a fine of not more than $2,000 for a third.
The act does not require an employer to allow any of it at work. The penalties for a person under 21, which differ above and below 18, are set out in the penalty section and are not covered here.
Sources for this section (3)
- MCL 333.27955 — Lawful marijuana activities for a person 21 or older
- MCL 333.27954 — What the marijuana act does not authorize
- MCL 333.27965 — Marijuana violations and penalties
Legal information, not legal advice. Verified as of September 2026. Applying it to a particular situation is the work of a licensed Michigan attorney.