New York Criminal Procedure Law Section 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.

Last modified: February 3, 2019