You Need to Know the Law:

• Be especially careful driving: Commonwealth police are told to use their best judgment in assessing whether or not you’re impaired, and an OUI can be slapped on you if they decide you are.

What you need to know

• Massachusetts is the 18th state in the U.S. to legalize recreational marijuana use. Adults 21 years of age or older are allowed to possess up to one ounce of marijuana or five grams of concentrate outside of their residence, and up to 10 ounces of marijuana inside their residence. Additionally, adults may possess and cultivate up to six marijuana plants with a maximum of 12 per household.
• You need to have and present a photo ID showing you are 21 years of age or older.
• While you can buy it legally, you can only consume it legally in private residences. But of course that’s not an option if you are here on vacation! Just remember that it’s still illegal to consume in public, including on public transportation and in parks, sidewalks, at the beach, etc., so use your discretion.
• Herring Cove and Race Point are not part of Provincetown; they belong to the National Seashore, and as such are federal property. Massachusetts’ marijuana laws do not apply there, and if you’re arrested you’ll be facing federal, rather than state and local, charges.
• Yes, they’ll pull you over if you drive under the influence. While there’s no way to accurately measure pot intake (as there is with alcohol), Commonwealth police are told to use their best judgment in assessing whether or not you’re impaired, and an OUI can be slapped on you if they decide you are.