501 CMR, § 10.13
With respect to any request by a defendant for information on protection services provided to a witness, the prosecuting officer shall seek appropriate court orders to ensure that the information concerning the witness remains as confidential as possible and is disseminated to as few persons as possible. With an appropriate court order, a defendant may obtain the witness's signed memorandum of understanding, a statement detailing the witness protection services provided, and the approximate cost of providing those services. This statement shall not contain any information which could lead any person to determine where the witness resided while receiving protection services. The Board shall develop model disclosure forms to accompany discovery produced to a defendant by a prosecuting officer.
501 CMR, § 10.13