N.Y. Soc. Serv. Law § 345

§ 345. Definition. As used in this title the term "child" means a\nperson under eighteen years of age, or a person under nineteen years of\nage who is a full-time student regularly attending a secondary school or\nin the equivalent level of vocational or technical training if, before\nsuch person attains age nineteen, such person may reasonably be expected\nto complete the program of such secondary school or training.\n