Mass. Gen. Laws ch. 53, § 115: Appointment of officers for first caucus

Section 115. A city or town committee of a political party which has adopted the provisions of law for the use of official ballots shall, at least ten days before holding any caucus thereunder, appoint caucus officers in each ward, town, or voting precinct in cities and towns where caucuses are held in such precincts, to serve at the first caucus to be held thereafter.