N.Y. Jud. Law § 13-b

§ 13-b. Oath of referee, receiver, commissioner or appraiser. A\nreferee, receiver, commissioner or appraiser appointed by a court or\njudge, before entering upon his duties, shall be sworn faithfully and\nfairly to discharge the trust committed to him. The oath may be waived\nupon consent of all parties.\n