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
705.05 - Pen register and trap and trace authorizations; in general.

705.05 Pen register and trap and trace authorizations; in general.
Under circumstances prescribed in this article, a justice may issue an
  order  authorizing  the use of a pen register or a trap and trace device
  upon ex parte application of an applicant who is authorized  by  law  to
  investigate,   prosecute  or  participate  in  the  prosecution  of  the
  designated crimes which are the subject of the application.