N.Y. Mental Hyg. Law § 9.03

§ 9.03 Admission to a hospital.\n Unless otherwise specifically provided for by statute, a person with a\nmental illness shall be admitted to a hospital as an in-patient only\npursuant to the provisions of this article, except that chemically\ndependent patients may be admitted to chemical dependence facilities\noperated by such hospitals under contract or agreement with the office\nof alcoholism and substance abuse services in accordance with the\nprovisions of article twenty-two of this chapter. The section of the\nmental hygiene law under which a patient is admitted or under which any\nchange of legal status is subsequently effected shall be stated in the\npatient's record.\n