N.Y. Town Law § 211
In each such improvement district, there shall be an annual election on the second Tuesday in the month of December of each year. The terms of office of all district commissioners elected or appointed prior to the time this chapter takes effect, shall terminate on the thirty-first day of December, nineteen hundred thirty-three. The first annual election shall be held on the fifth day of December, nineteen hundred thirty-three and at such election the qualified voters of the district shall elect one commissioner for a term of one year, one commissioner for a term of two years and one commissioner for a term of three years. At each annual election thereafter one commissioner shall be elected for a term of three years except as otherwise provided in section two hundred eleven-a of this article. Every resident of the district who is qualified to vote for a town officer, shall be eligible to hold the office of district commissioner.
N.Y. Town Law § 211