§ 120. Election of trustees. The adult male members belonging to the Shinnecock tribe of Indians in Suffolk county, who for the preceding six months shall have resided on the reservation of said tribe, may meet on the first Tuesday in April in each year, at the place of holding town meetings in the town of Southampton, and by plurality of votes elect three persons, belonging to such tribe, as trustees. The town clerk of said town shall attend and preside at such meetings and shall enter in a book kept by him for that purpose the names of the trustees chosen. He shall also enter in such book the proceedings of such trustees and of the justices of such town in reference to the allotment or leasing of Indian lands.