Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 152, § 64

The insurer shall make and enforce reasonable rules and regulations for the prevention of injuries on the premises of insured persons, and for this purpose inspectors of the insurer shall have free access to all such premises during regular working hours. Insured persons or employees thereof aggrieved by such rules or regulations may petition the executive office of labor and workforce development for a review, and it may affirm, amend or annul the rule or regulation.