Mass. Gen. Laws ch. 51, § 61: Certification of registered voters

Section 61. They shall forthwith, after the final day for registration before a biennial state or regular city or town election, certify to the state secretary the number of registered voters in the city or town, and in each ward and precinct therein.

In cities where the city clerk is not a member of the board of registrars, the registrars shall likewise, after the last day for registration for a city election, certify to the city clerk the number of registered voters in the city, and in each ward and voting precinct therein.