SUMMARY: Fifty-four percent of Massachusetts voters approved Question 4 which permits adults who are not participating in the state's medical cannabis program to legally grow (up to six plants, including all of the harvest from those plants) and to possess personal use quantities of cannabis (up to one ounce and/or up to 5 grams of concentrate; in addition, adults may legally possess up to ten ounces of marijuana flower in their home) while also licensing commercial cannabis production and retail sales. The law imposes a 3.75 percent excise tax on commercial marijuana sales. Under the law, localities have the authority to regulate, limit, or prohibit the operation of marijuana businesses.
The new law takes effect on December 15, 2016. Regulators are scheduled to begin accepting applications from marijuana-related businesses on October 1, 2017.