Illinois Statutes Chapter 725. Criminal Procedure § 5/108B-9. Recordings, records and custody

(a) Any private communication intercepted in accordance with this Article shall, if practicable, be recorded by tape or other comparable method. The recording shall, if practicable, be done in such a way as will protect it from editing or other alteration. During an interception, the interception shall be carried out by an electronic criminal surveillance officer, and, if practicable, such officer shall keep a signed, written record, including:

(b) Immediately upon the expiration of the order or its extensions, the tapes and other recordings shall be transferred to the chief judge issuing the order and sealed under his direction. Custody of the tapes, or other recordings, shall be maintained wherever the chief judge directs. They shall not be destroyed except upon an order of a court of competent jurisdiction and in any event shall be kept for 10 years. Duplicate tapes or other recordings may be made for disclosure or use under paragraph (a) of Section 108B-2a of this Article. The presence of the seal provided by this Section, or a satisfactory explanation for its absence, shall be a prerequisite for the disclosure of the contents of any private communication, or evidence derived from it, under paragraph (b) of Section 108B-2a of this Article.