Boston, MA: The State of MA has enacted the following:

St.2017, c.55 An Act to ensure safe access to marijuana
This law outlines the ability of cities and towns to exercise local control to ban or limit the development of marijuana establishments, sets the special excise tax on adult use marijuana sales to 10.75%, and includes a local option for cities and towns to add a 3% tax on top of the combined 17% between sales and the marijuana specific excise tax.

MGL c.10, §§76-77 Cannabis Control Board and Advisory Board

MGL c.64N Marijuana tax

MGL c.94C Controlled substances act.
Includes penalties for other drugs, trafficking or possession of larger quantities of marijuana.

MGL c.94G. The regulation and taxation of marijuana act
Effective December 15, 2016, adults may possess and use marijuana. After required licensing procedures, retail marijuana stores will be permitted to open beginning in July 2018.

Massachusetts regulations and administrative decisions

830 CMR 64N Marijuana retail taxes

935 CMR 500 Adult use of marijuana

Attorney General Municipal Law Unit Decision 8948, June 22, 2018. Approved Mansfield town meeting article “to extend the temporary moratorium to prohibit the use of land or structures for recreational marijuana establishments through June 30, 2019.” For more information, see AG Maura Healey’s ruling could slow Mass. marijuana industry, Boston Globe, June 24, 2018. “Attorney General Maura Healey is giving cities and towns more power to slow down the recreational marijuana industry, ruling that local officials can unilaterally prohibit cannabis companies for another year without polling residents.”