N.Y. Relig. Corp. Law § 346
An incorporated church to which this article is applicable may, at its annual corporate meeting where trustees are elected, by a majority vote of the duly qualified voters at such meeting, change the number of its trustees by adding more trustees, one-third of which shall be elected for three years, one-third for two years and one-third for one year; or by voting to discontinue the offices of certain specified trustees as they expire, one-third of said offices to be discontinued each year, until the number left is the number decided upon. No such changes shall affect the terms of the trustees then in office, but each shall hold office until his full term has expired unless his office shall terminate as provided for elsewhere in this article.
N.Y. Relig. Corp. Law § 346