Mass. Gen. Laws ch. 147 § 39B
A person licensed under section 33 to conduct boxing, kickboxing, mixed martial arts or other unarmed combative sports events, sparring matches or exhibitions, except those persons to whom a special license may be granted thereunder without the requirement of a bond or payment of the annual fee, shall take out a policy of accident insurance on each contestant participating in the match or exhibition in an amount determined by the commission, but not less than $10,000, to compensate the contestant for medical and hospital expenses incurred as the result of injuries received in such match or exhibition and a policy in an amount determined by the commission, but not less than $100,000, to be paid to the estate of a deceased contestant in the event of the death of the contestant resulting from participation in the match or exhibition. The premiums on the policies shall be paid by the licensee.
Mass. Gen. Laws ch. 147, § 147:39B