The Constitution of Massachusetts is the foremost source of state law.
Pursuant to the state constitution, the Massachusetts General Court has enacted legislation.
Its session laws are published in the official Acts and Resolves of Massachusetts.
[1] The Massachusetts Register is the bi-weekly publication that contains new and amended (permanent and emergency) regulations, notices of hearings and comment periods, notices of public interest, executive orders by the governor, attorney general opinions, a cumulative table of changes to regulations published during the current calendar year, and a list of acts and resolves passed by the General Court.
[1][2] The Code of Massachusetts Regulations (CMR) is the canonical compilation of regulations promulgated by state agencies pursuant to the Administrative Procedures Act and is updated through the Massachusetts Register.