Two-thirds necessary to conviction

N.Y. Judiciary Law § 422, under Judicial Proceedings For the Removal of Public Officers By Impeachment.

N.Y. Judiciary Law § 422

§ 422. Two-thirds necessary to conviction. The defendant cannot be convicted on an impeachment, without the concurrence of two-thirds of the members present during the trial; and if such two-thirds do not concur in a conviction, the defendant must be declared acquitted.