Mass. R. Civ. P. 83
As amended through October 3, 2024
Any court whose procedure is regulated in whole or in part by these rules may from time to time make and amend supplemental rules, or continue in force existing rules, governing its procedure not inconsistent with these rules. In instances not provided for by rule, each said court may regulate its practice in a manner not inconsistent with these rules and the said supplemental rules.
Mass. R. Civ. P. 83