Mass. Gen. Laws ch. 218 § 19C
The district court and Boston municipal court departments of the trial court shall have the same equitable powers and jurisdiction as is provided for the superior court pursuant to chapter 214 and the same authority with regard to declaratory judgments as is provided for the superior court pursuant to chapter 231A for the purpose of the hearing and disposition of summary process actions and of civil actions for money damages under section 19 of this chapter.
The district courts shall have original jurisdiction in rem and personam of all actions arising under sections one hundred and twenty-seven A to one hundred and twenty-seven K, inclusive, of chapter one hundred and eleven. The district courts shall have equity powers only to the extent necessary to enforce the aforementioned sections, including the power to appoint receivers, grant injunctions and issue restraining orders as justice and equity may require and for punishing civil contempt of orders, rulings and decrees made or pronounced in the exercise of this jurisdiction.
Subject to the approval of the supreme judicial court, the chief justice for the district court department may from time to time promulgate rules and prescribe forms for the efficient operation of such equity sessions in the courts of the district court department; and in the Boston municipal court department the chief justice for said department may promulgate such rules and prescribe such forms.
Mass. Gen. Laws ch. 218, § 19C