New york constitution
Article VI: judiciary
Section 3

(9) The court of appeals shall adopt and from time to time may amend a rule to permit the court to answer questions of New York law certified to it by the Supreme Court of the United States, a court of appeals of the United States or an appellate court of last resort of another state, which may be determinative of the cause then pending in the certifying court and which in the opinion of the certifying court are not controlled by precedent in the decisions of the courts of New York.