N.Y. Const. art. VI, § 30

The legislature shall have the same power to alter and regulate the jurisdiction and proceedings in law and in equity that it has heretofore exercised. The legislature may, on such terms as it shall provide and subject to subsequent modification, delegate, in whole or in part, to a court, including the appellate division of the supreme court, or to the chief administrator of the courts, any power possessed by the legislature to regulate practice and procedure in the courts. The chief administrator of the courts shall exercise any such power delegated to him or her with the advice and consent of the administrative board of the courts. Nothing herein contained shall prevent the adoption of regulations by individual courts consistent with the general practice and procedure as provided by statute or general rules.