Massachusetts has established a robust legal framework for both medical and recreational cannabis use. This document outlines the key laws and regulations for consumers in the Commonwealth.

Recreational Cannabis (Adult Use)

In 2016, Massachusetts voters passed Question 4, legalizing the recreational use of cannabis for adults 21 and older.

Possession and Purchase Limits

Adults can legally possess and purchase the following amounts:

• Public Possession: Up to 1 ounce of cannabis or 5 grams of concentrate.
• Home Possession: Up to 10 ounces of cannabis.
• Purchase Limit: Up to 1 ounce of flower, 5 grams of concentrate, or 20 servings of edibles per transaction from a licensed retailer.

Where You Can and Cannot Consume

Consumption is subject to strict regulations:

• Legal Consumption: Private property (with the property owner's permission).
• Illegal Consumption: Public places, federal land (including national parks), and anywhere smoking tobacco is prohibited. It is illegal to consume cannabis in a motor vehicle (even as a passenger).

Home Cultivation

Adults 21 and older are permitted to cultivate cannabis at home, subject to the following limits:

• Individual Limit: Up to 6 flowering cannabis plants.
• Household Limit: A maximum of 12 flowering cannabis plants, regardless of the number of adults in the residence.

Medical Cannabis

Massachusetts has a Medical Use of Marijuana Program for registered patients.

Patient Registration

To legally purchase and possess medical cannabis, a person must:

1. Have a qualifying medical condition.
2. Obtain a written certification from a registered physician.
3. Register with the Cannabis Control Commission (CCC) and receive a Medical Use of Marijuana Program ID Card.

For details on qualifying conditions and the registration process, please refer to the official state guidelines: File.

Key Differences for Medical Users

Feature	Recreational User (21+)	Registered Medical Patient
Possession Limit (Home)	10 ounces	10 ounces (or a 60-day supply, as determined by the physician)
Possession Limit (Public)	1 ounce	10 ounces
Sales Tax	Subject to state sales tax (6.25%) and excise tax (10.75%)	Exempt from state sales and excise tax
Minimum Age	21	Varies, with parental consent required for minors

General Prohibitions and Penalties

It is important to be aware of the following prohibitions:

• Driving Under the Influence (OUI): Operating a vehicle while impaired by cannabis is illegal and subject to severe penalties.
• Interstate Transport: Crossing state lines with cannabis, even to another legal state, is illegal under federal law.
• Unlicensed Sale/Distribution: Only licensed establishments may sell cannabis products. Unlicensed sales are a felony.