Section 270.25 - Trial jury; peremptory challenge of an individual juror1. A peremptory challenge is an objection to a prospective juror for which no reason need be assigned. Upon any peremptory challenge, the court must exclude the person challenged from service.2. Each party must be allowed the following number of peremptory challenges: (a) Twenty for the regular jurors if the highest crime charged is a class A felony, and two for each alternate juror to be selected.(b) Fifteen for the regular jurors if the highest crime charged is a class B or class C felony, and two for each alternate juror to be selected.(c) Ten for the regular jurors in all other cases, and two for each alternate juror to be selected.3. When two or more defendants are tried jointly, the number of peremptory challenges prescribed in subdivision two is not multiplied by the number of defendants, but such defendants are to be treated as a single party. In any such case, a peremptory challenge by one or more defendants must be allowed if a majority of the defendants join in such challenge. Otherwise, it must be disallowed.N.Y. Crim. Proc. Law § 270.25