Title 50 › Chapter CHAPTER 36— - FOREIGN INTELLIGENCE SURVEILLANCE › Subchapter SUBCHAPTER III— - PEN REGISTERS AND TRAP AND TRACE DEVICES FOR FOREIGN INTELLIGENCE PURPOSES › § 1841
Sets out what certain words mean for this part of the law. Several words — "foreign power," "agent of a foreign power," "international terrorism," "foreign intelligence information," "Attorney General," "United States person," "United States," "person," and "State" — use the same meanings as in section 1801 of this title. The phrases "pen register" and "trap and trace device" have the meanings given in section 3127 of title 18. An "aggrieved person" is someone whose phone line or other communication device was targeted by a pen register or trap-and-trace device used under this subchapter. A "specific selection term" is a label that points to a particular person, account, address, device, or other unique identifier and is used to narrow the search as much as reasonably possible. It does not include broad labels that fail to narrow the search, such as the name of a service provider (see section 1881 of this title or section 2711 of title 18) or a large geographic area (country, city, county, State, zip code, or area code), unless those are part of a specific identifier or the provider itself is the target. "Address" covers physical and electronic addresses, including email and temporary network addresses like IP addresses. You may use more than one specific selection term.
Full Legal Text
War and National Defense — Source: USLM XML via OLRC
Legislative History
Reference
Citation
50 U.S.C. § 1841
Title 50 — War and National Defense
Last Updated
Apr 6, 2026
Release point: 119-73