100 STAT. 1870
PUBLIC LAW 99-508—OCT. 21, 1986
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"(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 to -sdevice, 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.
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"(d) NONDISCLOSURE OF EXISTENCE OF P E N 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.
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18 USC 3124.
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"§ 3124. Assistance in installation and use of a pen register or a trap and trace device "(a) P E N REGISTERS.—Upon the request of an attorney for the Government or an officer of a law enforcement agency authorized to install and use a pen register under this chapter, a provider of wire or electronic communication service, landlord, custodian, or other person shall furnish such investigative or law enforcement officer forthwith all information, facilities, and technical assistance necessary to accomplish the installation of the pen register unobtrusively and with a minimum of interference with the services that the person so ordered by the court accords the party with respect to whom the installation and use is to take place, if such assistance is directed by a court order as provided in section 3123(b)(2) of this title. "(b) TRAP AND TRACE DEVICE.—Upon the request of an attorney
for the Government or an officer of a law enforcement agency authorized to receive the results of a trap and trace device under this chapter, a provider of a wire or electronic communication service, landlord, custodian, or other person shall install such device forthwith on the appropriate line and shall furnish such investigative or law enforcement officer all additional information, facilities and technical assistance including installation and operation of the
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