You must be 21 or older to buy and use marijuana. (There are some medical exceptions.)
You don't have to be a Massachusetts resident. You must have a government ID.
Sales are cash only.
Rules on possession:
You may possess up to 1 ounce of weed and up to 5 grams of marijuana concentrate outside of your home.
Using marijuana in public is prohibited. If an area bans tobacco smoking, that means it also bans smoking marijuana.
You may use marijuana only in your home. There may be limits if you're a renter.
A landlord may prohibit or regulate marijuana smoking in the lease agreement. But a lease agreement cannot ban a tenant from consuming marijuana in ways other than smoking.
State law allows you to give up to one ounce to another person.
Rules on transporting:
Again, you can possess up to 1 ounce outside of your home. That includes a motor vehicle, but the marijuana or marijuana product must be in a sealed container or secured in the trunk or locked glove compartment.
Driving while stoned is illegal
Hash & Concentrates:
An adult may possess up to five grams of marijuana concentrate.
An adult may buy and use marijuana paraphernalia.
Selling marijuana paraphernalia to someone under 18 years of age is a felony
The new law does not change your status as a patient using medical marijuana.