2010 New York Code
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
705.10 - Orders authorizing the use of a pen register or a trap and trace device; when issuable.

§  705.10  Orders  authorizing  the  use of a pen register or a trap and
               trace device; when issuable.
    An order authorizing the use of a pen register or  a  trap  and  trace
  device may issue only:
    1.  Upon  an  appropriate  application  made  in  conformity with this
  article; and
    2. Upon a determination  that  an  application  sets  forth  specific,
  articulable  facts, warranting the applicant's reasonable suspicion that
  a designated crime has been, is being, or is about to be  committed  and
  demonstrating that the information likely to be obtained by use of a pen
  register  or  trap and trace device is or will be relevant to an ongoing
  criminal investigation of such designated crime.