50 U.S.C. § 1845 (WAR AND NATIONAL DEFENSE)
§ 1845. Use of information
(a) In general
(1) Information acquired from the use of a pen register or trap and trace device installed pursuant to this subchapter concerning any United States person may be used and disclosed by Federal officers and employees without the consent of the United States person only in accordance with the provisions of this section.
(2) No information acquired from a pen register or trap and trace device installed and used pursuant to this subchapter may be used or disclosed by Federal officers or employees except for lawful purposes.
(b) Disclosure for law enforcement purposes
No information acquired pursuant to this subchapter shall be disclosed for law enforcement purposes unless such disclosure is accompanied by a statement that such information, or any information derived therefrom, may only be used in a criminal proceeding with the advance authorization of the Attorney General.
(c) Notification of intended disclosure by United States
Whenever the United States intends to enter into evidence or otherwise use or disclose in any trial, hearing, or other proceeding in or before any court, department, officer, agency, regulatory body, or other authority of the United States against an aggrieved person any information obtained or derived from the use of a pen register or trap and trace device pursuant to this subchapter, the United States shall, before the trial, hearing, or the other proceeding or at a reasonable time before an effort to so disclose or so use that information or submit it in evidence, notify the aggrieved person and the court or other authority in which the information is to be disclosed or used that the United States intends to so disclose or so use such information.
(d) Notification of intended disclosure by State or political subdivision
Whenever any State or political subdivision thereof intends to enter into evidence or otherwise use or disclose in any trial, hearing, or other proceeding in or before any court, department, officer, agency, regulatory body, or other authority of the State or political subdivision thereof against an aggrieved person any information obtained or derived from the use of a pen register or trap and trace device pursuant to this subchapter, the State or political subdivision thereof shall notify the aggrieved person, the court or other authority in which the information is to be disclosed or used, and the Attorney General that the State or political subdivision thereof intends to so disclose or so use such information.
(e) Motion to suppress
(1) Any aggrieved person against whom evidence obtained or derived from the use of a pen register or trap and trace device is to be, or has been, introduced or otherwise used or disclosed in any trial, hearing, or other proceeding in or before any court, department, officer, agency, regulatory body, or other authority of the United States, or a State or political subdivision thereof, may move to suppress the evidence obtained or derived from the use of the pen register or trap and trace device, as the case may be, on the grounds that—
(A) the information was unlawfully acquired; or
(B) the use of the pen register or trap and trace device, as the case may be, was not made in conformity with an order of authorization or approval under this subchapter.
(2) A motion under paragraph (1) shall be made before the trial, hearing, or other proceeding unless there was no opportunity to make such a motion or the aggrieved person concerned was not aware of the grounds of the motion.
(f) In camera and ex parte review
(1) Whenever a court or other authority is notified pursuant to subsection (c) or (d) of this section, whenever a motion is made pursuant to subsection (e) of this section, or whenever any motion or request is made by an aggrieved person pursuant to any other statute or rule of the United States or any State before any court or other authority of the United States or any State to discover or obtain applications or orders or other materials relating to the use of a pen register or trap and trace device authorized by this subchapter or to discover, obtain, or suppress evidence or information obtained or derived from the use of a pen register or trap and trace device authorized by this subchapter, the United States district court or, where the motion is made before another authority, the United States district court in the same district as the authority shall, notwithstanding any other provision of law and if the Attorney General files an affidavit under oath that disclosure or any adversary hearing would harm the national security of the United States, review in camera and ex parte the application, order, and such other materials relating to the use of the pen register or trap and trace device, as the case may be, as may be necessary to determine whether the use of the pen register or trap and trace device, as the case may be, was lawfully authorized and conducted.
(2) In making a determination under paragraph (1), the court may disclose to the aggrieved person, under appropriate security procedures and protective orders, portions of the application, order, or other materials relating to the use of the pen register or trap and trace device, as the case may be, or may require the Attorney General to provide to the aggrieved person a summary of such materials, only where such disclosure is necessary to make an accurate determination of the legality of the use of the pen register or trap and trace device, as the case may be.
(g) Effect of determination of lawfulness
(1) If the United States district court determines pursuant to subsection (f) of this section that the use of a pen register or trap and trace device was not lawfully authorized or conducted, the court may, in accordance with the requirements of law, suppress the evidence which was unlawfully obtained or derived from the use of the pen register or trap and trace device, as the case may be, or otherwise grant the motion of the aggrieved person.
(2) If the court determines that the use of the pen register or trap and trace device, as the case may be, was lawfully authorized or conducted, it may deny the motion of the aggrieved person except to the extent that due process requires discovery or disclosure.
(h) Binding final orders
Orders granting motions or requests under subsection (g) of this section, decisions under this section that the use of a pen register or trap and trace device was not lawfully authorized or conducted, and orders of the United States district court requiring review or granting disclosure of applications, orders, or other materials relating to the installation and use of a pen register or trap and trace device shall be final orders and binding upon all courts of the United States and the several States except a United States Court of Appeals or the Supreme Court.
(Pub. L. 95–511, title IV, § 405, as added Pub. L. 105–272, title VI, § 601(2), Oct. 20, 1998, 112 Stat. 2408.)