Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 56, § 59

The supreme judicial court and the superior court department of the trial court shall have jurisdiction of civil actions to enforce the provisions of chapters fifty to fifty-six, inclusive, and may award relief formerly available in equity or by mandamus. The supreme judicial court shall also have jurisdiction of any civil action relative to the division of the commonwealth into congressional, councillor, senatorial, and representative districts in chapter fifty-seven, but every such action shall be filed within thirty days after the act establishing such districts has the force of a law.