N.Y. Crim. Proc. Law § 700.40

§ 700.40 Eavesdropping and video surveillance warrants; order of\n extension.\n At any time prior to the expiration of an eavesdropping or video\nsurveillance warrant, the applicant may apply to the issuing justice,\nor, if he is unavailable, to another justice, for an order of extension.\nThe period of extension shall be no longer than the justice deems\nnecessary to achieve the purposes for which it was granted and in no\nevent longer than thirty days. The application for an order of\nextension must conform in all respects to the provisions of section\n700.20 and, in addition, must contain a statement setting forth the\nresults thus far obtained from the interception, or a reasonable\nexplanation of the failure to obtain such results. The provisions of\nsections 700.15 and 700.25 are applicable in the determination of such\napplication. The order of extension must conform in all respects to the\nprovisions of section 700.30. In the execution of such order of\nextension the provisions of section 700.35 are applicable.\n