N.Y. Educ. Law § 1606

§ 1606. Mode of exercise of trustees' powers. 1. The powers committed\nby law to the trustees of a common school district must be exercised by\nthem as a board. The board must meet for the transaction of business in\naccordance with notice of time and place.\n 2. In a board composed of three trustees, when two only meet to\ndeliberate upon any matter, and the third, if notified, does not attend,\nor the three meet and deliberate thereon, the conclusion of two upon the\nmatter, and their order, act or proceeding in relation thereto, shall be\nas valid as though it were the conclusion, order, act or proceeding of\nthe three; and a recital of the two in their minute of the conclusion,\nact or proceeding, or in their order, act or proceeding of the fact of\nsuch notice, or of such meeting and deliberation, shall be conclusive\nevidence thereof.\n 3. A meeting of the board may be ordered by any member thereof, by\ngiving not less than twenty-four hours' notice of the same.\n