N.Y. Civil Practice Law & Rules § 3132: Service of interrogatories

Rule 3132. Service of interrogatories. After commencement of an

action, any party may serve written interrogatories upon any other

party. Interrogatories may not be served upon a defendant before that

defendant's time for serving a responsive pleading has expired, except

by leave of court granted with or without notice. A copy of the

interrogatories and of any order made under this rule shall be served on

each party.