Mass. Gen. Laws ch. 218 § 43
The chief justice shall from time to time make and promulgate uniform rules of practice and procedure, subject to the approval of the supreme judicial court, including rules for the preparation and submission of reports, the allowance of reports which a justice shall disallow as not conformable to the facts, or shall fail to allow by reason of physical or mental disability, death, resignation, retirement or removal and the reporting of cases reserved for report when a justice shall fail to report the same by reason of physical or mental disability, death, resignation, retirement or removal, the granting of new trials, and the practice and the manner of conducting business in cases which are not expressly provided for by law. Such rules shall not apply to the Boston municipal court department.
Mass. Gen. Laws ch. 218, § 43