Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 51, § 46A

Except as provided in section forty-seven, the registrars, upon receipt of an affidavit of registration, shall transmit a duplicate copy thereof to the registrars in the city or town where the person last registered to vote, if within the commonwealth, or to the state secretary of the state where the person last registered to vote, if the person had indicated that his previous residence was in that state.