Massachusetts Constitution Pt. 2, Ch. VI, Art. 6

ART. VI. All the laws which have heretofore been adopted, used and approved in the Province, Colony or State of Massachusetts Bay, and usually practised on in the courts of law, shall still remain and be in full force, until altered or repealed by the legislature; such parts only excepted as are repugnant to the rights and liberties contained in this constitution.