Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 53, § 90

A political party in a city or town which has accepted said special provisions may, not less than one year after the date of the caucus wherein such provisions were adopted, revoke such action at a caucus called and held in the manner provided in the preceding section. Upon the adoption of said provisions or upon the revocation of such adoption, the secretary of the city or town committee of such political party shall, within ten days thereafter, file a notice thereof with the state secretary and with the clerk of the city or town and the secretary of the state committee of the political party so voting.