Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 43C, § 14

Notwithstanding any provision of this chapter, any city or town may, by majority vote as defined in section one of chapter forty-four, adopt an optional plan of municipal administration under this chapter or revoke or rescind a plan accepted pursuant to this section; provided, that for a town the majority vote necessary to adopt, revoke, or rescind a plan pursuant to this section shall be at the annual meeting.