Mass. Gen. Laws ch. 231 § 85W
Except as provided otherwise in this section and in section eighty-five V, no person who serves without compensation, other than reimbursement for actual expenses, as an officer, director or trustee of any nonprofit charitable organization including those corporations qualified under 26USC section 501 (c)(3) shall be liable for any civil damages as a result of any acts or omissions relating solely to the performance of his duties as an officer, director or trustee; provided, however, that the immunity conferred by this section shall not apply to any acts or omissions intentionally designed to harm or to any grossly negligent acts or omissions which result in harm to the person. Nothing in this section shall be construed as affecting or modifying any existing legal basis for determining the liability, or any defense thereto, of any person not covered by the immunity conferred by this section.
Nothing in this section shall be construed as affecting or modifying the liability of any person subject to this section for acts or omissions which are committed in the course of activities primarily commercial in nature even though carried on to obtain revenue to be used for charitable purposes, nor for any cause of action arising out of such person's operation of an automobile.
Mass. Gen. Laws ch. 231, § 85W