Massachusetts Constitution Amendments Art. II, § 2

Any city or town shall have the power to adopt or revise a charter or to amend its existing charter through the procedures set forth in sections three and four. The provisions of any adopted or revised charter or any charter amendment shall not be inconsistent with the constitution or any laws enacted by the general court in conformity with the powers reserved to the general court by section eight.

No town of fewer than twelve thousand inhabitants shall adopt a city form of government, and no town of fewer than six thousand inhabitants shall adopt a form of government providing for a town meeting limited to such inhabitants of the town as may be elected to meet, deliberate, act and vote in the exercise of the corporate powers of the town.