2014 New York Laws
CPL - Criminal Procedure
Part 3 - SPECIAL PROCEEDINGS AND MISCELLANEOUS PROCEDURES
Title T - PROCEDURES FOR SECURING EVIDENCE BY MEANS OF COURT ORDER AND FOR SUPPRESSING EVIDENCE UNLAWFULLY OR IMPROPERLY OBTAINED
Article 705 - (705.00 - 705.35) PEN REGISTERS AND TRAP AND TRACE DEVICES
705.30 - Nondisclosure of existence of pen register or a trap and trace device.

705.30  Nondisclosure of existence of pen register or a trap and trace
           device.
An  order  authorizing  or approving the installation and use of a pen
  register or a trap and trace device shall direct that:
1. the order be sealed until otherwise ordered by the court; and
2. the person owning or leasing the line to which the pen register  or
  a  trap  and  trace  device  is attached, or who has been ordered by the
  court to provide assistance to the applicant, not disclose the existence
  of the pen register or trap and trace device or  the  existence  of  the
  investigation  to  the listed subscriber, or to any other person, unless
  or until otherwise ordered by the court.