720 ILCS 5/14-3A: Recordings, records, and custody.

(a) Any private oral communication intercepted in accordance with subsection (g) of Section 14-3 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 a law enforcement officer, and the officer shall keep a signed, written record, including:

(1) The day and hours of interception or recording;

(2) The time and duration of each intercepted communication;

(3) The parties, if known, to each intercepted communication; and

(4) A summary of the contents of each intercepted communication.

(b) Both the written record of the interception or recording and any and all recordings of the interception or recording shall immediately be inventoried and shall be maintained where the chief law enforcement officer of the county in which the interception or recording occurred directs. The written records of the interception or recording conducted under subsection (g) of Section 14-3 shall not be destroyed except upon an order of a court of competent jurisdiction and in any event shall be kept for 10 years.