2006 New York Code - Oath To Members Of The Court.

 
    §  246. Oath to members of the court. At the time and place appointed,
  and before the court proceeds to act upon  the  impeachment,  the  clerk
  must  administer to the presiding judge, and the presiding judge to each
  of the members of the court then present, an oath or  affirmation  truly
  and  impartially  to try and determine the impeachment; and no member of
  the court can act or vote upon the impeachment, or any question  arising
  thereon, without having taken this oath or affirmation.