 
                       PART II--CRIMINAL PROCEDURE
 
          CHAPTER 206--PEN REGISTERS AND TRAP AND TRACE DEVICES
 
Sec. 3123. Issuance of an order for a pen register or a trap and 
        trace device
        
    (a) In General.--Upon an application made under section 3122 of this 
title, the court shall enter an ex parte order authorizing the 
installation and use of a pen register or a trap and trace device within 
the jurisdiction of the court if the court finds that the attorney for 
the Government or the State law enforcement or investigative officer has 
certified to the court that the information likely to be obtained by 
such installation and use is relevant to an ongoing criminal 
investigation.
    (b) Contents of Order.--An order issued under this section--
        (1) shall specify--
            (A) the identity, if known, of the person to whom is leased 
        or in whose name is listed the telephone line to which the pen 
        register or trap and trace device is to be attached;
            (B) the identity, if known, of the person who is the subject 
        of the criminal investigation;
            (C) the number and, if known, physical location of the 
        telephone line to which the pen register or trap and trace 
        device is to be attached and, in the case of a trap and trace 
        device, the geographic limits of the trap and trace order; and
            (D) a statement of the offense to which the information 
        likely to be obtained by the pen register or trap and trace 
        device relates; and

        (2) shall direct, upon the request of the applicant, the 
    furnishing of information, facilities, and technical assistance 
    necessary to accomplish the installation of the pen register or trap 
    and trace device under section 3124 of this title.

    (c) Time Period and Extensions.--(1) An order issued under this 
section shall authorize the installation and use of a pen register or a 
trap and trace device for a period not to exceed sixty days.
    (2) Extensions of such an order may be granted, but only upon an 
application for an order under section 3122 of this title and upon the 
judicial finding required by subsection (a) of this section. The period 
of extension shall be for a period not to exceed sixty days.
    (d) Nondisclosure of Existence of Pen Register or a Trap and Trace 
Device.--An order authorizing or approving the installation and use of a 
pen register or a trap and trace device shall direct that--
        (1) the order be sealed until otherwise ordered by the court; 
    and
        (2) the person owning or leasing the line to which the pen 
    register or a trap and trace device is attached, or who has been 
    ordered by the court to provide assistance to the applicant, not 
    disclose the existence of the pen register or trap and trace device 
    or the existence of the investigation to the listed subscriber, or 
    to any other person, unless or until otherwise ordered by the court.

(Added Pub. L. 99-508, title III, Sec. 301(a), Oct. 21, 1986, 100 Stat. 
1869.)

                  Section Referred to in Other Sections

    This section is referred to in sections 3121, 3122, 3124, 3125 of 
this title.
