Mass. Gen. Laws ch. 266 § 133
Whoever unlawfully enters a house, boat house or hut which is the property of the Humane Society of the Commonwealth of Massachusetts and wilfully injures, removes or carries away any property belonging to said society, or wilfully injures or unlawfully uses or commits any trespass upon the property of said society which is intended or kept for the purpose of saving or preserving human life, or commits any trespass upon such house, hut or boat house, shall be punished by a fine of not more than two hundred dollars or by imprisonment for not more than six months; but the penalties of this section shall not apply to persons for whose use said boats, houses and other property are intended and kept. Pilots, sheriffs and their deputies, and constables shall make complaint against all persons guilty of a violation of this section. One half of any fine paid hereunder shall be paid to the person who gives information upon which a conviction is obtained.
Mass. Gen. Laws ch. 266, § 133