General Laws: CHAPTER 233, Section 57

PART III COURTS, JUDICIAL OFFICERS AND PROCEEDINGS IN CIVIL CASES
(Chapters 211 through 262)
TITLE II ACTIONS AND PROCEEDINGS THEREIN
CHAPTER 233 WITNESSES AND EVIDENCE
Section 57 Rules for perpetuation of testimony of witnesses without commonwealth

Section 57. The supreme judicial court may make rules for taking depositions to perpetuate the testimony of witnesses without the commonwealth, taken under a commission from the supreme judicial or the superior court, and for filing or recording them.