Mass. Gen. Laws ch. 176, § 17
A society authorized to do business in the commonwealth may provide for the payment of—
(g) Such other benefits as authorized for life insurers and which are not inconsistent with this chapter.
A society shall specify in its rules those persons who may be issues, or covered by, the contractual benefits authorized in clauses (a) to (g), inclusive, consistent with providing benefits to members and their dependents.