Mass. Gen. Laws ch. 161 § 94A
Whoever places or throws filth, rubbish or any other substance within a station, waiting room, or terminal of a public transportation facility, or upon the platform, stairs, grounds or on other premises of a public transportation facility, after having been forbidden to do so either by notice posted thereon, or by the person who has the lawful control of said premises, or by a railroad, railway, or railway express officer or by any police officer, shall be punished by a fine of not more than twenty-five dollars and may be arrested without a warrant by such officer and kept in a convenient place, not more than twenty-four hours Sundays and legal holidays excepted, at or before the expiration of which he shall be taken before a proper court or magistrate and proceeded against according to law.
Mass. Gen. Laws ch. 161, § 94A