2019 New York Laws
CPL - Criminal Procedure
Part 3 - Special Proceedings and Miscellaneous Procedures
Title R - Procedures for Securing Attendance of Witnesses in Criminal Actions
Article 610 - Securing Attendance of Witnesses by Subpoena
610.20 - Securing Attendance of Witnesses by Subpoena; When and by Whom Subpoena May Be Issued.

§  610.20 Securing attendance of witnesses by subpoena; when and by whom
           subpoena may be issued.
1. Any criminal court may issue a subpoena for  the  attendance  of  a
  witness in any criminal action or proceeding in such court.
2.  A  district attorney, or other prosecutor where appropriate, as an
  officer of a criminal court in which he is conducting the prosecution of
  a criminal action or proceeding, may issue a  subpoena  of  such  court,
  subscribed  by himself, for the attendance in such court or a grand jury
  thereof of any witness whom the people are  entitled  to  call  in  such
  action or proceeding.
* 3.  An  attorney for a defendant in a criminal action or proceeding,
  as an officer of a criminal court, may issue a subpoena of  such  court,
  subscribed  by  himself, for the attendance in such court of any witness
  whom the defendant is entitled to call in such action or proceeding.  An
  attorney  for  a  defendant  may not issue a subpoena duces tecum of the
  court directed to any department, bureau or agency of the state or of  a
  political  subdivision  thereof,  or  to  any  officer or representative
  thereof. Such a subpoena duces tecum  may  be  issued  in  behalf  of  a
  defendant  upon  order  of  a  court pursuant to the rules applicable to
  civil cases as provided in section twenty-three  hundred  seven  of  the
  civil practice law and rules.
* NB Effective until January 1, 2020
* 3.  An  attorney for a defendant in a criminal action or proceeding,
  as an officer of a criminal court, may issue a subpoena of  such  court,
  subscribed  by  himself, for the attendance in such court of any witness
  whom the defendant is entitled to call in such action or proceeding.  An
  attorney  for  a  defendant  may not issue a subpoena duces tecum of the
  court directed to any department, bureau or agency of the state or of  a
  political  subdivision  thereof,  or  to  any  officer or representative
  thereof, unless the subpoena is indorsed by the court  and  provides  at
  least  three  days for the production of the requested materials. In the
  case of an emergency, the court may by order dispense with the three-day
  production period.
* NB Effective January 1, 2020
* 4. The showing required to sustain any subpoena under  this  section
  is  that  the  testimony  or  evidence sought is reasonably likely to be
  relevant and material to  the  proceedings,  and  the  subpoena  is  not
  overbroad or unreasonably burdensome.
* NB Effective January 1, 2020