Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 130, § 15A

Any game protector, fish and game warden, coastal warden, conservation officer or other person who is empowered to make arrests for violations of the conservation or marine fishing laws of the state of New Hampshire or of the state of Rhode Island may pursue any person found fishing in the coastal waters of such state in violation of the marine fishing laws thereof onto adjacent coastal waters of this commonwealth and there arrest him and take him into such other state for the purpose of prosecuting him for such violation; provided, that such other state shall have enacted legislation giving substantially similar authority to the environmental police officers of the division of law enforcement including deputy environmental police officers and other appropriate officers of this commonwealth relative to persons found fishing in the coastal waters of this commonwealth in violation of the marine fishing laws thereof.