TITLE 50 - US CODE - SUBCHAPTER III - PEN REGISTERS AND TRAP AND TRACE DEVICES FOR FOREIGN INTELLIGENCE PURPOSES

50 USC 1841 - Definitions

As used in this subchapter:
(1) The terms foreign power, agent of a foreign power, international terrorism, foreign intelligence information, Attorney General, United States person, United States, person, and State shall have the same meanings as in section 1801 of this title.
(2) The terms pen register and trap and trace device have the meanings given such terms in section 3127 of title 18.
(3) The term aggrieved person means any person
(A) whose telephone line was subject to the installation or use of a pen register or trap and trace device authorized by this subchapter; or

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(B) whose communication instrument or device was subject to the use of a pen register or trap and trace device authorized by this subchapter to capture incoming electronic or other communications impulses.

50 USC 1842 - Pen registers and trap and trace devices for foreign intelligence and international terrorism investigations

(a) Application for authorization or approval 

(1) Notwithstanding any other provision of law, the Attorney General or a designated attorney for the Government may make an application for an order or an extension of an order authorizing or approving the installation and use of a pen register or trap and trace device for any investigation to obtain foreign intelligence information not concerning a United States person or to protect against international terrorism or clandestine intelligence activities, provided that such investigation of a United States person is not conducted solely upon the basis of activities protected by the first amendment to the Constitution which is being conducted by the Federal Bureau of Investigation under such guidelines as the Attorney General approves pursuant to Executive Order No. 12333, or a successor order.
(2) The authority under paragraph (1) is in addition to the authority under subchapter I of this chapter to conduct the electronic surveillance referred to in that paragraph.
(b) Form of application; recipient 
Each application under this section shall be in writing under oath or affirmation to
(1) a judge of the court established by section 1803 (a) of this title; or
(2) a United States Magistrate Judge under chapter 43 of title 28 who is publicly designated by the Chief Justice of the United States to have the power to hear applications for and grant orders approving the installation and use of a pen register or trap and trace device on behalf of a judge of that court.
(c) Executive approval; contents of application 
Each application under this section shall require the approval of the Attorney General, or a designated attorney for the Government, and shall include
(1) the identity of the Federal officer seeking to use the pen register or trap and trace device covered by the application; and
(2) a certification by the applicant that the information likely to be obtained is foreign intelligence information not concerning a United States person or is relevant to an ongoing investigation to protect against international terrorism or clandestine intelligence activities, provided that such investigation of a United States person is not conducted solely upon the basis of activities protected by the first amendment to the Constitution.
(d) Ex parte judicial order of approval 

(1) Upon an application made pursuant to this section, the judge shall enter an ex parte order as requested, or as modified, approving the installation and use of a pen register or trap and trace device if the judge finds that the application satisfies the requirements of this section.
(2) An order issued under this section
(A) shall specify
(i) the identity, if known, of the person who is the subject of the investigation;
(ii) the identity, if known, of the person to whom is leased or in whose name is listed the telephone line or other facility to which the pen register or trap and trace device is to be attached or applied; and
(iii) the attributes of the communications to which the order applies, such as the number or other identifier, and, if known, the location of the telephone line or other facility to which the pen register or trap and trace device is to be attached or applied and, in the case of a trap and trace device, the geographic limits of the trap and trace order;
(B) shall direct that
(i) upon request of the applicant, the provider of a wire or electronic communication service, landlord, custodian, or other person shall furnish any information, facilities, or technical assistance necessary to accomplish the installation and operation of the pen register or trap and trace device in such a manner as will protect its secrecy and produce a minimum amount of interference with the services that such provider, landlord, custodian, or other person is providing the person concerned;
(ii) such provider, landlord, custodian, or other person
(I) shall not disclose the existence of the investigation or of the pen register or trap and trace device to any person unless or until ordered by the court; and
(II) shall maintain, under security procedures approved by the Attorney General and the Director of National Intelligence pursuant to section 1805 (b)(2)(C)1 of this title, any records concerning the pen register or trap and trace device or the aid furnished; and
(iii) the applicant shall compensate such provider, landlord, custodian, or other person for reasonable expenses incurred by such provider, landlord, custodian, or other person in providing such information, facilities, or technical assistance; and
(C) shall direct that, upon the request of the applicant, the provider of a wire or electronic communication service shall disclose to the Federal officer using the pen register or trap and trace device covered by the order
(i) in the case of the customer or subscriber using the service covered by the order (for the period specified by the order)
(I) the name of the customer or subscriber;
(II) the address of the customer or subscriber;
(III) the telephone or instrument number, or other subscriber number or identifier, of the customer or subscriber, including any temporarily assigned network address or associated routing or transmission information;
(IV) the length of the provision of service by such provider to the customer or subscriber and the types of services utilized by the customer or subscriber;
(V) in the case of a provider of local or long distance telephone service, any local or long distance telephone records of the customer or subscriber;
(VI) if applicable, any records reflecting period of usage (or sessions) by the customer or subscriber; and
(VII) any mechanisms and sources of payment for such service, including the number of any credit card or bank account utilized for payment for such service; and
(ii) if available, with respect to any customer or subscriber of incoming or outgoing communications to or from the service covered by the order
(I) the name of such customer or subscriber;
(II) the address of such customer or subscriber;
(III) the telephone or instrument number, or other subscriber number or identifier, of such customer or subscriber, including any temporarily assigned network address or associated routing or transmission information; and
(IV) the length of the provision of service by such provider to such customer or subscriber and the types of services utilized by such customer or subscriber.
(e) Time limitation 

(1) Except as provided in paragraph (2), an order issued under this section shall authorize the installation and use of a pen register or trap and trace device for a period not to exceed 90 days. Extensions of such an order may be granted, but only upon an application for an order under this section and upon the judicial finding required by subsection (d) of this section. The period of extension shall be for a period not to exceed 90 days.
(2) In the case of an application under subsection (c) where the applicant has certified that the information likely to be obtained is foreign intelligence information not concerning a United States person, an order, or an extension of an order, under this section may be for a period not to exceed one year.
(f) Cause of action barred 
No cause of action shall lie in any court against any provider of a wire or electronic communication service, landlord, custodian, or other person (including any officer, employee, agent, or other specified person thereof) that furnishes any information, facilities, or technical assistance under subsection (d) of this section in accordance with the terms of an order issued under this section.
(g) Furnishing of results 
Unless otherwise ordered by the judge, the results of a pen register or trap and trace device shall be furnished at reasonable intervals during regular business hours for the duration of the order to the authorized Government official or officials.
[1] See References in Text note below.

50 USC 1843 - Authorization during emergencies

(a) Requirements for authorization 
Notwithstanding any other provision of this subchapter, when the Attorney General makes a determination described in subsection (b) of this section, the Attorney General may authorize the installation and use of a pen register or trap and trace device on an emergency basis to gather foreign intelligence information not concerning a United States person or information to protect against international terrorism or clandestine intelligence activities, provided that such investigation of a United States person is not conducted solely upon the basis of activities protected by the first amendment to the Constitution if
(1) a judge referred to in section 1842 (b) of this title is informed by the Attorney General or his designee at the time of such authorization that the decision has been made to install and use the pen register or trap and trace device, as the case may be, on an emergency basis; and
(2) an application in accordance with section 1842 of this title is made to such judge as soon as practicable, but not more than 48 hours, after the Attorney General authorizes the installation and use of the pen register or trap and trace device, as the case may be, under this section.
(b) Determination of emergency and factual basis 
A determination under this subsection is a reasonable determination by the Attorney General that
(1) an emergency requires the installation and use of a pen register or trap and trace device to obtain foreign intelligence information not concerning a United States person or information to protect against international terrorism or clandestine intelligence activities, provided that such investigation of a United States person is not conducted solely upon the basis of activities protected by the first amendment to the Constitution before an order authorizing the installation and use of the pen register or trap and trace device, as the case may be, can with due diligence be obtained under section 1842 of this title; and
(2) the factual basis for issuance of an order under such section 1842 of this title to approve the installation and use of the pen register or trap and trace device, as the case may be, exists.
(c) Effect of absence of order 

(1) In the absence of an order applied for under subsection (a)(2) of this section approving the installation and use of a pen register or trap and trace device authorized under this section, the installation and use of the pen register or trap and trace device, as the case may be, shall terminate at the earlier of
(A) when the information sought is obtained;
(B) when the application for the order is denied under section 1842 of this title; or
(C) 48 hours after the time of the authorization by the Attorney General.
(2) In the event that an application for an order applied for under subsection (a)(2) of this section is denied, or in any other case where the installation and use of a pen register or trap and trace device under this section is terminated and no order under section 1842 of this title is issued approving the installation and use of the pen register or trap and trace device, as the case may be, no information obtained or evidence derived from the use of the pen register or trap and trace device, as the case may be, shall be received in evidence or otherwise disclosed in any trial, hearing, or other proceeding in or before any court, grand jury, department, office, agency, regulatory body, legislative committee, or other authority of the United States, a State, or political subdivision thereof, and no information concerning any United States person acquired from the use of the pen register or trap and trace device, as the case may be, shall subsequently be used or disclosed in any other manner by Federal officers or employees without the consent of such person, except with the approval of the Attorney General if the information indicates a threat of death or serious bodily harm to any person.

50 USC 1844 - Authorization during time of war

Notwithstanding any other provision of law, the President, through the Attorney General, may authorize the use of a pen register or trap and trace device without a court order under this subchapter to acquire foreign intelligence information for a period not to exceed 15 calendar days following a declaration of war by Congress.

50 USC 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.

50 USC 1846 - Congressional oversight

(a) On a semiannual basis, the Attorney General shall fully inform the Permanent Select Committee on Intelligence of the House of Representatives and the Select Committee on Intelligence of the Senate, and the Committee on the Judiciary of the House of Representatives and the Committee on the Judiciary of the Senate, concerning all uses of pen registers and trap and trace devices pursuant to this subchapter.
(b) On a semiannual basis, the Attorney General shall also provide to the committees referred to in subsection (a) of this section and to the Committees on the Judiciary of the House of Representatives and the Senate a report setting forth with respect to the preceding 6-month period
(1) the total number of applications made for orders approving the use of pen registers or trap and trace devices under this subchapter;
(2) the total number of such orders either granted, modified, or denied; and
(3) the total number of pen registers and trap and trace devices whose installation and use was authorized by the Attorney General on an emergency basis under section 1843 of this title, and the total number of subsequent orders approving or denying the installation and use of such pen registers and trap and trace devices.