This law addresses confidentiality as an essential factor in the mediation process. It also defines a mediator for the purposes of the section in terms of his/her role and qualifications.
General Laws of Massachusetts: Chapter 233, Section 23C - Work product of mediator confidential; confidential communications; exception: mediator defined
Massachusetts Legislature. Jan. 1, 2019http://www.malegislature.gov/Laws/GeneralLaws/PartIII/TitleII/Chapter233/Section23c