N.Y. Jud. Law § 421

§ 421. Proceedings thereon. If an objection to the sufficiency of the\nimpeachment be not sustained by a majority of the members of the court\nwho heard the argument, the defendant must forthwith answer the articles\nof impeachment. If he plead guilty, or refuse to plead, the court must\nrender judgment of conviction against him. If he deny the matters\ncharged the court must, at such time as it may appoint, proceed to try\nthe impeachment, and may adjourn the trial from time to time until\nconcluded.\n