Origins and Impact of the Foreign Intelligence Surveillance Act (FISA) Provisions That Expired on March 15, 2020

January 6, 2009 – March 31, 2021 R40138

Origins and Impact of the Foreign Intelligence
March 31, 2021
Surveillance Act (FISA) Provisions That Expired Edward C. Liu
on March 15, 2020
Legislative Attorney

Congress enacted two amendments to the Foreign Intelligence Surveillance Act (FISA) in 2001
as part of the USA PATRIOT Act. Section 206 of the USA PATRIOT Act amended FISA to

permit multipoint, or “roving,” wiretaps by adding flexibility to the degree of specificity with
which the location or facility subject to electronic surveillance under FISA must be identified. Section 215 enlarged the scope
of materials that could be sought under FISA to include “any tangible thing.” It also lowered the standard required for a court
to compel their production.
Congress enacted a third FISA amendment in 2004, as part of the Intelligence Reform and Terrorism Prevention Act
(IRTPA). Section 6001(a) of the IRTPA changed the rules regarding the types of individuals who may be targets of FISA-
authorized searches. Also known as the “lone wolf” provision, it permits surveillance of non-U.S. persons engaged in
international terrorism without requiring evidence linking those people to an identifiable foreign power or terrorist
organization.
In summer 2013, media began reporting on several foreign intelligence activities conducted by the National Security Agency
(NSA), including the bulk collection of telephone metadata under Section 215 of the USA PATRIOT Act. After a one-day
lapse in the expiring authorities, Congress enacted the USA FREEDOM Act, which placed new limitations on the scope of
the government’s foreign intelligence activities, while simultaneously extending the expired provisions through March 15,
2020.
Although these provisions expired on March 15, 2020, grandfather clauses permit them to remain effective with respect to
investigations that began, or potential offenses that took place, before the sunset date.
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Origins and Impact of the FISA Provisions That Expired on March 15, 2020

Overview
The Foreign Intelligence Surveillance Act of 1978 (FISA) provides a statutory framework by
which government agencies may, when gathering foreign intelligence for an investigation,1 obtain
authorization to conduct electronic surveillance2 or physical searches,3 use pen registers and trap
and trace devices,4 or access specified business records and other tangible things.5 Authorization
for such activities is typically obtained through a court order from the Foreign Intelligence
Surveillance Court (FISC), a specialized court created to hear the government’s requests to use
FISA authorities.
Shortly after the 9/11 terrorist attacks, Congress enacted the USA PATRIOT Act, in part, to
“provid[e] enhanced investigative tools” to “assist in the prevention of future terrorist activities
and the preliminary acts and crimes which further such activities.”6 The Patriot Act and
subsequent measures7 amended FISA to enable the government to obtain information in a wider
range of circumstances. At the time of enactment, these expanded authorities prompted concerns
regarding the appropriate balance between national security interests and civil liberties. Perhaps
in response to such concerns, Congress established sunset provisions that apply to three of the
most controversial amendments to FISA:
 Section 6001(a) of the Intelligence Reform and Terrorism Prevention Act
(IRTPA), also known as the “lone wolf” provision, which simplifies the
evidentiary showing needed to obtain a FISA court order to target non-U.S.
persons who engage in international terrorism or activities in preparation
therefor, specifically by authorizing such orders without demonstrating a link
between a targeted individual and a foreign power;8
 Section 206 of the USA PATRIOT Act, which permits multipoint, or “roving,”
wiretaps (i.e., wiretaps which may follow a target even when he or she changes
phones) by adding flexibility to how the subject of a FISA court order is
specified;9 and
 Section 215 of the USA PATRIOT Act, which authorizes orders compelling a
person to produce “any tangible thing” that is “relevant” to an authorized foreign
intelligence, international terrorism, or counter-espionage investigation.10

1 Although FISA is often discussed in relation to preventing terrorism, it applies to gathering foreign intelligence
information for other purposes as well. For example, it extends to the collection of information necessary to conduct
foreign affairs. See 50 U.S.C. § 1801(e) (defining “foreign intelligence information”).
2 50 U.S.C. §§ 1801-1808.
3 50 U.S.C. §§ 1822-1826.
4 50 U.S.C. §§ 1841-1846. Pen registers capture the numbers dialed on a telephone line; trap and trace devices identify
the originating number of a call on a particular phone line. See 18 U.S.C. § 3127(3)-(4).
5 50 U.S.C. §§ 1861-1862.
6 Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism
(USA PATRIOT) Act of 2001, P.L. 107-56 (2001); H.Rept. 107-236, pt. 1, at 41 (2001).
7 See, e.g., Intelligence Reform and Terrorism Prevention Act, P.L. 108-458 (2004).
8 Id. at § 6001(a), codified at 50 U.S.C. § 1801(b)(1)(C).
9 P.L. 107-56, § 206, codified at 50 U.S.C. § 1805(c)(2)(B).
10 Id. at § 215, codified at 50 U.S.C. §§ 1861-2. Records are presumptively relevant if they pertain to a foreign power
or an agent of a foreign power; the activities of a suspected agent of a foreign power who is the subject of such
authorized investigation; or an individual in contact with, or known to, a suspected agent of a foreign power who is the
subject of such authorized investigation. Additionally, if the records sought are “library circulation records, library
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Congress originally set these provisions to expire on December 31, 2005, but extended the
expiration dates multiple times through June 1, 2015.11 In summer 2013, media began reporting
on several foreign intelligence activities conducted by the National Security Agency (NSA),
including the bulk collection of telephone metadata under Section 215. The controversy
surrounding Section 215 complicated efforts to reauthorize all three of the expiring provisions,
and they eventually expired on June 1, 2015. One day later, Congress enacted the USA
FREEDOM Act, which placed new limitations on the scope of the government’s foreign
intelligence activities, while simultaneously extending the expired provisions through December
15, 2019.12 In December 2019, Congress extended the three provisions, as amended by the USA
FREEDOM Act, until March 15, 2020.13 The provisions have not been reauthorized since they
expired on March 15, 2020.
Background
The Fourth Amendment
The Fourth Amendment provides a right “of the people to be secure in their persons, houses,
papers, and effects, against unreasonable searches and seizures.”14 Many of the government
activities discussed in this report could constitute a search as that term is defined in Fourth
Amendment jurisprudence. Namely, government action constitutes a search when it intrudes upon
a person’s “reasonable expectation of privacy,” which requires both that an “individual
manifested a subjective expectation of privacy in the searched object” and that “society is willing
to recognize that expectation as reasonable.”15
The Fourth Amendment ultimately limits the government’s ability to conduct a range of activities,
such as physical searches of homes or offices, listening to phone conversations, and electronic
surveillance. The Fourth Amendment requires the government to show “probable cause” and
obtain a warrant issued by a “neutral and detached magistrate”16 before conducting a search.17
The Supreme Court has, however, recognized several exceptions to the warrant requirement.18

patron lists, book sales records, book customer lists, firearms sales records, tax return records, educational records, or
medical records containing information that would identify a person,” the application must be approved by one of three
high-ranking FBI officers, and cannot be further delegated.
11 See, e.g., P.L. 109-160 (extension until February 3, 2006); USA PATRIOT Improvement and Reauthorization Act of
2005, P.L. 109-177 (extension until December 31, 2009); Department of Defense Appropriations Act, 2010, P.L. 111-
118, § 1004 (2009) (extension until February 28, 2010); P.L. 111-141 (extension until February 28, 2011); P.L. 112-3
(extension until May 27, 2011); and P.L. 112-14 (extension until June 1, 2015).
12 Uniting and Strengthening America by Fulfilling Rights and Ensuring Effective Discipline Over Monitoring Act of
2015, P.L. 114-23.
13 P.L. 116-69, § 1703.
14 U.S. Const. amend. IV.
15 Kyllo v. United States, 533 U.S. 27, 33 (2001) (citing California v. Ciraolo, 476 U.S. 207, 211 (1986)).
16 Shadwick v. City of Tampa, 407 U.S. 345, 350 (1972).
17 See, e.g., Atwater v. City of Lago Vista, 532 U.S. 318, 354 (2001) (recognizing a warrant exception for arrest of an
individual who commits a crime in an officer’s presence, as long as the arrest is supported by probable cause). Probable
cause is “a fluid concept—turning on the assessment of probabilities in particular factual contexts.” Illinois v. Gates,
462 U.S. 213, 232 (1983). For example, to issue a search warrant, probable cause requires a magistrate to determine,
based on specific evidence, whether there is a “fair probability” that, for example, an area contains contraband. Id. at
238.
18 See Riley v. California, 573 U.S. 373, 382 (2014) (“In the absence of a warrant, a search is reasonable only if it falls
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These exceptions include exigent circumstances,19 searches incident to arrest,20 and searches with
the suspect’s consent.21
The extent to which the Fourth Amendment warrant requirement applies to the government’s
collection of information for intelligence gathering and other purposes unrelated to criminal
investigations is unclear. Although the Supreme Court held that surveillance of wire or oral
communications for criminal law enforcement purposes is subject to the Fourth Amendment’s
warrant requirement in 1967,22 neither the Supreme Court nor Congress sought to regulate use of
such surveillance for national security purposes at that time.
Several years later, the Supreme Court invalidated warrantless electronic surveillance of domestic
organizations for national security purposes, but indicated that its conclusion might differ if the
electronic surveillance targeted foreign powers or their agents.23 A lower court has since upheld
the statutory scheme governing gathering foreign intelligence information against a Fourth
Amendment challenge, despite assuming that orders issued under the statute might not constitute
“warrants” for Fourth Amendment purposes.24 The Supreme Court has not yet directly addressed
the issue. However, even if the Court were to hold that the warrant requirement does not apply to
searches for foreign intelligence or national security purposes, such searches would presumably
be subject to the general Fourth Amendment “reasonableness” test.25
In contrast with its surveillance rulings, the Supreme Court has not historically applied Fourth
Amendment protections to documents held by third parties. In 1976, it held that the government
could obtain financial records in the possession of third parties without a warrant.26 Later, the
Supreme Court likewise held that installing and using a pen register—a device used to capture
telephone numbers dialed—does not constitute a Fourth Amendment search.27 The Court
reasoned that individuals have a lesser expectation of privacy for information held by third

within a specific exception to the warrant requirement.”).
19 See, e.g., Illinois v. McArthur, 531 U.S. 326, 331 (2001) (stating that a warrantless seizure was not unreasonable
because “it involves a plausible claim of specially pressing or urgent law enforcement need, i.e., ‘exigent
circumstances.’”).
20 See Chimel v. California, 395 U.S. 752 (1969).
21 See Schneckloth v. Bustamonte, 412 U.S. 218, 219 (1973).
22 Katz v. United States, 389 U.S. 347, 353 (1967), overruling Olmstead v. United States, 277 U.S. 438 (1928).
23 United States v. U.S. District Court, 407 U.S. 297, 313-14, 321-24 (1972) (also called the Keith case, so named for
the District Court judge who initially ordered disclosure of unlawful warrantless electronic surveillance to the
defendants). See also In re Directives, 551 F.3d 1004, 1011 (Foreign Intell. Surveillance Ct. Rev. 2008) (holding that
the foreign intelligence surveillance of targets reasonably believed to be outside the U.S. qualifies for the “special
needs” exception to the warrant requirement).
24 In re Sealed Case, 310 F.3d 717, 738-46 (Foreign Intell. Surveillance Ct. Rev. 2002).
25 The “general reasonableness,” or “totality-of-the circumstances,” test requires a court to determine the
constitutionality of a search or seizure “by assessing, on the one hand, the degree to which [a search or seizure] intrudes
upon an individual’s privacy and, on the other, the degree to which it is needed for the promotion of legitimate
governmental interests.” Samson v. California, 547 U.S. 843, 848 (2006). See DAVID S. KRIS & DOUGLAS WILSON,
NATIONAL SECURITY INVESTIGATIONS & PROSECUTIONS § 11:2 (2019) (“Whether or not FISA orders are ‘Warrants,’
they are constitutional only if they are ‘reasonable’ under the Fourth Amendment.”).
26 United States v. Miller, 425 U.S. 435 (1976).
27 Smith v. Maryland, 442 U.S. 735, 745-46 (1979).
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parties. This reasoning has been applied to noncontent data, such as the to/from address line in an
email,28 but not to communication contents—for example, the body of an email.29
In 2018, however, the Supreme Court held that obtaining seven days of historical cell-site
location information (CSLI) from cellular telephone providers constituted a Fourth Amendment
search.30 In extending Fourth Amendment protections to CSLI, the Court reasoned that, given the
ubiquity of cell phones and the fact that cell phone users can transmit CSLI simply by possessing
their phones, “[o]nly the few without cell phones could escape this tireless and absolute
surveillance” by law enforcement.31 Describing its decision as “narrow,” the Supreme Court
declined to consider collection techniques involving foreign affairs or national security.32
“Title III,” the Pen/Trap Statute, and FISA
Title III of the Omnibus Crime Control and Safe Streets Act of 1968 (“Title III”)33 and the Pen
Registers and Trap and Trace Devices chapter of Title 18 (“Pen/Trap statute”)34 regulate the
government’s ability to conduct real-time electronic surveillance.35 Subject to certain statutory
exemptions, Title III requires the government to obtain a court order before intercepting, using, or
disclosing the contents of electronic communications.36 The Pen/Trap statute requires the
government to obtain a court order before collecting noncontent information, such as phone
numbers or internet headers.37
Enacted in 1978, FISA provides a statutory framework governing governmental authority to
conduct electronic surveillance and other activities, which Fourth Amendment warrant
requirements cover in domestic criminal investigations, in foreign intelligence investigations.38
FISA’s statutory requirements arguably provide a minimum standard that the government must
meet before it may conduct foreign intelligence searches or surveillance.
Expiring FISA Amendments
The three amendments to FISA covered by this report are the “lone wolf,” “roving wiretap,” and
Section 215 provisions. Although the amendments are often discussed together and may implicate

28 United States v. Forrester, 512 F.3d 500, 511 (9th Cir. 2007).
29 United States v. Warshak, 631 F.3d 266 (10th Cir. 2010).
30 Carpenter v. United States,—U.S.—, 138 S. Ct. 2206, 2217 (2018).
31 Id. at 2218.
32 Id. at 2217, n.3.
33 18 U.S.C. §§ 2510-2522.
34 18 U.S.C. §§ 3121-3127.
35 See Off. of Legal Educ. & Exec. Off. for U.S. Att’ys, Searching and Seizing Computers and Obtaining Electronic
Evidence in Criminal Investigations (2009), p. 151, https://www.justice.gov/sites/default/files/criminal-ccips/legacy/
2015/01/14/ssmanual2009.pdf.
36 18 U.S.C. § 2518.
37 18 U.S.C. § 3122. See Off. of Legal Educ. & Exec., supra note 37, at 152 (discussing the definition of non-content
information).
38 The scope of the Fourth Amendment warrant requirement informs the scope of activities FISA governs insofar as
FISA refers to the warrant requirement in its definitions. See 50 U.S.C. § 1801 (restricting the definition of electronic
surveillance to instances “in which a person has a reasonable expectation of privacy and a warrant would be required
for law enforcement purposes”) (emphasis added).
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similar questions about the legal standards that govern the FISC’s determinations, unique
historical and legal issues apply to each amendment.
Access to Business Records Under Section 215
As a result of the 2013 leaks by Edward Snowden about the government’s bulk collection of
telephone metadata, Section 215 has become FISA’s most controversial provision in recent years,
as well as the provision with the greatest legislative and litigation history. Section 215 of the USA
PATRIOT Act broadened federal officials’ access to materials in investigations to obtain foreign
intelligence information about non-United States persons or to protect against international
terrorism or clandestine intelligence activities.39 It both enlarged the scope of materials that the
government may seek and lowered the standard for a court to order their production.40
Expansion of the Scope of Documents Subject to FISA
Before the enactment of the USA PATRIOT Act, FISA authorized the production of only four
types of business records in foreign intelligence or international terrorism investigations. These
were records from common carriers, public accommodation facilities, storage facilities, and
vehicle rental facilities.41 The USA PATRIOT Act expanded the scope of records to authorize the
production of “any tangible things.”42 The USA FREEDOM Act does not change the scope of
documents potentially covered by Section 215.
Changes to the Standard of Review
Section 215 of the USA PATRIOT Act also modified the evidentiary standard the FISC would
apply before issuing an order compelling the production of documents. Before enactment of
Section 215, an applicant had to have “specific and articulable facts giving reason to believe that
the person to whom the records pertain is a foreign power or an agent of a foreign power.”43 In
contrast, under Section 215 as originally enacted, the applicant only needed to “specify that the
records concerned [were] sought for a [foreign intelligence, international terrorism, or espionage
investigation.]”44 In 2005, Congress further amended FISA to change the procedures for obtaining
business records. The amended procedures require “a statement of facts showing that there are
reasonable grounds to believe that the tangible things sought are relevant to a [foreign

39 A technical amendment to § 215 passed a few months after § 215’s enactment authorizes the gathering of
intelligence information that does not concern a U.S. person. See P.L. 107-56, § 215, amended by P.L. 107-108, § 314,
codified at 50 U.S.C. § 1861.
40 50 U.S.C. § 1861.
41 50 U.S.C. § 1862(a).
42 50 U.S.C. § 1861(a)(1). This expanded scope drew such strong opposition from the library community that § 215
came to be known as the “library provision,” despite the fact that the original text of the provision did not mention
libraries. E.g. Richard B. Schmitt, House Weakens Patriot Act’s ‘Library Provision’, L.A. TIMES, June 16, 2005, at A-
1. In response to these concerns, the USA PATRIOT Improvement and Reauthorization Act of 2005 made a library-
specific amendment to the § 215 procedures. Under this amendment, one of three high-ranking FBI officers must
approve the application if the records sought are “library circulation records, library patron lists, book sales records,
book customer lists, firearms sales records, tax return records, educational records, or medical records containing
information that would identify a person.” Only the Director of the Federal Bureau of Investigation, the Deputy
Director of the Federal Bureau of Investigation, or the Executive Assistant Director for National Security can apply for
these records. This authority cannot be further delegated. 50 U.S.C. § 1861(a)(3).
43 50 U.S.C. § 1862(b)(2)(B).
44 P.L. 107-56, § 215.
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intelligence, international terrorism, or espionage investigation.]”45 Under this standard, records
are presumptively relevant if they pertain to
 a foreign power or an agent of a foreign power;
 the activities of a suspected agent of a foreign power who is the subject of such
authorized investigation; or
 an individual in contact with, or known to, a suspected agent of a foreign power
who is the subject of such authorized investigation.46
Following the public disclosure of these bulk intelligence activities, Congress amended Section
215 in the USA FREEDOM Act to require the use of a “specific selection term” (SST) to “limit
collection to the greatest extent reasonably practicable.”47 Congress defined an SST as “a term
that specifically identifies a person, account, address, or personal device, or any other specific
identifier.” These amendments also prohibited orders under Section 215 that are limited only by
broad geographic terms (such as a state or zip code) or named communications service providers
(such as Verizon or AT&T).48
Nondisclosure and Judicial Review
Orders issued under Section 215, as amended, include nondisclosure orders prohibiting recipients
from disclosing that the FBI has sought or obtained any tangible things pursuant to a FISA order.
However, the recipient may discuss the order with other persons as necessary to comply with the
order, with an attorney to obtain legal advice or assistance, or with other persons as permitted by
the FBI.49 The recipient must identify persons to whom disclosure has been made, or is intended
to be made, if the FBI requests, except the recipient does not have to identify attorneys with
whom he has consulted.50
The USA PATRIOT Improvement and Reauthorization Act of 2005 provided procedures by
which a Section 215 order recipient may challenge such order to produce business records.51
Once a recipient submits a petition for review, a FISC judge must determine whether the petition
is frivolous within 72 hours.52 If the petition is frivolous, it must be denied and the order
affirmed.53 The judge may modify or set aside the order if it does not meet FISA requirements or
is otherwise unlawful.54 Either party may appeal the FISC judgment to the Foreign Intelligence
Court of Review and the Supreme Court.55

45 USA PATRIOT Improvement and Reauthorization Act of 2005, P.L. 109-177, § 106(b).
46 50 U.S.C. § 1861(b)(2)(A).
47 P.L. 114-23, § 103.
48 Id. § 107.
49 50 U.S.C. § 1861(d)(1).
50 50 U.S.C. § 1861(d)(2)(C).
51 50 U.S.C. § 1861(f)(2)(A)(i). The Act also amended authorities related to issuing and reviewing national security
letters (NSLs), among other authorities. See, e.g., 18 U.S.C. § 2709.
52 50 U.S.C. § 1861(f)(2)(A)(ii).
53 Id.
54 50 U.S.C. § 1861(f)(2)(B).
55 50 U.S.C. § 1861(f)(3).
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Judicial review of nondisclosure orders operates similarly,56 but such orders are not reviewable
for one year after they are initially issued.57 If the FISC does not find the petition to be frivolous,
a nondisclosure order may be set aside if there is
no reason to believe that disclosure may endanger the national security of the United States,
interfere with a criminal, counterterrorism, or counterintelligence investigation, interfere
with diplomatic relations, or endanger the life or physical safety of any person.58
The government may defeat a petition to set aside a nondisclosure order if it certifies that
disclosure would endanger national security or interfere with diplomatic relations.59 Absent a
finding of bad faith, the FISC is to treat such a certification as conclusive. If a petition is denied,
either due to a certification described above, frivolity, or otherwise, the petitioner may not
challenge the nondisclosure order for another year.60 Appeals by either party may be heard by the
Foreign Intelligence Court of Review and the Supreme Court.61
USA FREEDOM Act Call Detail Records Authority
Beginning in 2006, the government began to use FISC orders issued pursuant to Section 215 to
collect domestic telephone metadata in bulk in order to help detect and identify individuals who
were part of terrorist networks.62 This program is frequently described as collecting telephone
metadata “in bulk” to distinguish it from the narrower collection of metadata related to an
identified individual or group of individuals that is commonplace in both law enforcement and
national security investigations.
The USA FREEDOM Act amended Section 215 to establish a slightly relaxed standard to obtain
such telephone metadata on an ongoing basis, but only for international terrorism investigations.63
Whereas a standard Section 215 order would produce only records that are responsive to an
approved SST, an order seeking telephone records for an international terrorism investigation can
also be used to produce a second set of telephone records that are not responsive to an approved
SST, but are connected to a record that an SST directly produced.64 For example, if Alice called
Bob, and Bob also called Charles, then a single Section 215 order that used Alice’s phone number
as an SST could obtain records of the call to Bob as well as records of Bob’s call to Charles. In
order to take advantage of this increased scope of production, the government would need to
demonstrate to the FISC that there was a “reasonable articulable suspicion” that the SST is

56 P.L. 109-178, § 3, added the provisions for judicial review of nondisclosure orders.
57 50 U.S.C. § 1861(f)(2)(A)(i).
58 50 U.S.C. § 1861(f)(2)(C)(i).
59 The Attorney General, Deputy Attorney General, an Assistant Attorney General, or the Director of the Federal
Bureau of Investigation must make these certifications. 50 U.S.C. § 1861(f)(2)(C)(ii).
60 50 U.S.C. § 1861(f)(2)(C)(iii).
61 50 U.S.C. § 1861(f)(3).
62 Unclassified Declaration of Frances J. Fleisch, National Security Agency, Schubert v. Obama, No. 07-cv-0693-JSW
at ¶ 32 (N.D. Cal. December 20, 2013) available at http://icontherecord.tumblr.com. Metadata in this context includes
dialed and incoming call logs, along with the date, time, and duration of the calls. The collection of bulk metadata
began at the NSA shortly after the terrorist attacks of September 11, 2001. This earlier collection did not use Section
215 authority. In re Application of the FBI for an Order Requiring the Production of Tangible Things from [Redacted],
No. BR 14-01, at 11 n.7 (FISA Ct. March 20, 2014).
63 50 U.S.C. § 1861(b)(2)(C). Orders issued under this authority would last for 180 days. 50 U.S.C. § 1861(c)(2)(F)(i).
64 50 U.S.C. § 1861(c)(2)(F)(iv).
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associated with a foreign power, or an agent of a foreign power, who was engaged in international
terrorism.65
Since Section 215’s amendment, reports have surfaced describing compliance issues with the
NSA’s Section 215 program. On June 28, 2018, for example, the NSA publicly announced that
analysts had discovered technical irregularities in some data received from telecommunications
service providers, which resulted in unauthorized CDR production and required deleting three
years’ worth of CDRs.66 In March 2019, the New York Times and Wall Street Journal also
reported that the NSA was weighing whether to end its CDR program entirely.67
Despite speculation among commentators that changes in communication technologies since
2001 had lessened the utility of Section 215 collections,68 the House passed H.R. 6172 on March
11, 2020, which would have reauthorized the provision, though not without some changes.69
Specifically, the proposed reauthorization included amendments (1) terminating the CDR
authority, and (2) prohibiting using Section 215 to acquire cellular and GPS location information
or “any tangible thing” in which a person would have a reasonable expectation of privacy and a
warrant would typically be required.70 The Senate passed an amended version of H.R. 6172 on
May 14, 2020. The House requested a conference on June 1, 2020, but no further action was
taken.
“Lone Wolf” Terrorists
Commonly referred to as the “lone wolf” provision, Section 6001(a) of IRTPA simplifies the
evidentiary standard used to determine whether an individual, other than a citizen or a permanent
resident of the United States, who engages in international terrorism, may be the target of a FISA
court order. It does not modify other standards used to determine the secondary question of
whether the electronic surveillance or a physical search of the subject of a court order is justified
in a specific situation.
Historical Context
The historical impetus for the “lone wolf” provision involved Zacarias Moussaoui, one of the
individuals believed to be responsible for the 9/11 terrorist attacks. During the examination of the
events leading up to the attacks, it was reported that limitations in FISA authorities hampered
investigations regarding Moussaoui’s involvement.71 Specifically, FBI agents investigating
Moussaoui suspected that he had planned a terrorist attack involving piloting commercial
airliners, and had detained him in August 2001 on an immigration charge.72 The FBI agents then

65 50 U.S.C. § 1861(b)(2)(C)(ii).
66 See Nat’l Sec. Agency, NSA Reports Data Deletion (2018), https://www.nsa.gov/news-features/press-room/Article/
1618691/nsa-reports-data-deletion/ (last visited May 18, 2020).
67 See Susan Landau, Is Section 215 No Longer Worth the Effort?, LAWFARE (Mar. 11, 2019),
https://www.lawfareblog.com/section-215-no-longer-worth-effort.
68 Id.
69 H.R. 6172.
70 Id.
71 NAT’L COMM. ON TERRORIST ATTACKS UPON THE U.S., The 9/11 Commission Report, at 273-274 [hereinafter “9/11
Comm’n Rep.”]
72 Id. at 273. Moussaoui, a French national, was present in the United States with an expired visa.
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sought a court order under FISA to examine the contents of Moussaoui’s laptop computer.73
However, the agency apparently concluded that it had insufficient information at that time to
demonstrate that Moussaoui was an agent of a foreign power as then required by FISA.74
Prior to its amendment, FISA authorized the FISC to approve, among other things, physical
searches of a laptop only if probable cause existed to believe the laptop was owned or used by a
foreign power or its agent.75 The definition of a “foreign power” included “groups engaged in
international terrorism or activities in preparation therefor.”76 Individuals involved in international
terrorism for or on behalf of those groups were considered “agents of a foreign power.”77 In the
weeks leading up to the attacks, it appears that the FBI encountered an actual or perceived
insufficiency of information demonstrating probable cause to believe that Moussaoui was acting
for or on behalf of an identifiable group engaged in international terrorism.78
Legislative Responses
Following these revelations, Members of Congress proposed amending the definition of “agents
of a foreign power” under FISA so that individuals engaged in international terrorism need not be
linked to a specific foreign power.79 Congress enacted one such amendment by passing the
Intelligence Reform and Terrorism Prevention Act of 2004 (IRTPA).80 Section 6001 of the
legislation, known as the “lone wolf” provision, provides that persons, other than citizens or
permanent residents of the United States, who are engaged in international terrorism are
presumptively considered to be agents of a foreign power.81 The provision obviates any need to
provide an evidentiary connection between an individual and a foreign government or terrorist
group.
Critics of the “lone wolf” provision argued that the laptop in the Moussaoui case could have been
lawfully searched under FISA or the laws governing generic criminal warrants.82 Critics also
expressed concern that the simplified “lone wolf” standard would lead to “FISA serving as a
substitute for some of our most important criminal laws.”83

73 Id. at 273-274.
74 Id. at 274. Based upon this conclusion, the FBI “declined to submit a FISA application” to the FISC.
75 50 U.S.C. § 1821-1824.
76 50 U.S.C. § 1801(a)(4). At the time, foreign powers also included foreign governments, entities controlled by those
governments, and factions of foreign nations and foreign-based political organizations that are not substantially
composed of United States persons. Id. at § (a)(1-6)
77 50 U.S.C. § 1801(b)(2)(C).
78 See 9/11 Comm’n Rep. at 274. It is unclear whether a search of Moussaoui’s laptop before September 11, 2001,
would have provided enough information to prevent or minimize those attacks.
79 S. 2586, 107th Cong. (2002); S. 113, 108th Cong. (2003).
80 S. 2845, 108th Cong. (2004) (enacted).
81 P.L. 108-458, § 6001(a), codified at 50 U.S.C. § 1801(b)(1)(C). FISA also defines “agent of a foreign power” to
include any person other than a United States person who “engages in the international proliferation of weapons of
mass destruction, or activities in preparation therefor.” § 1801(b)(1)(D). As commentators note, § 1801(b)(1)(C) and
§ 1801(b)(1)(D) are similar in that neither imposes the requirement of a connection to a foreign power. David S. Kris &
J. Douglas Wilson, NATIONAL SECURITY INVESTIGATIONS AND PROSECUTIONS § 8:15 (2019). However, § 1801(b)(1)(D)
is not subject to sunset.
82 See S.Rept. 108-40 at 33-41 (additional views of Sens. Leahy and Feingold on a similar “lone wolf” provision in S.
113).
83 Id. at 73 (additional views of Sen. Feingold).
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Proponents of the provision noted that the increased self-organization among terror networks has
made proving connections to identifiable groups more difficult. Thus, a “lone wolf” provision is
necessary to combat terrorists who use a modern organizational structure or are self-radicalized.84
Roving Wiretaps
Section 206 of the USA PATRIOT Act amended FISA to permit multipoint, or “roving,” wiretaps
by adding flexibility to the degree of specificity with which the location or facility subject to
electronic surveillance under FISA must be identified.85 It is often colloquially described as
allowing FISA wiretaps to target persons rather than places.
Background
Prior to enactment of Section 206, the scope of electronic surveillance authorized by a court order
was limited in two ways. First, the location or facility that was the subject of surveillance had to
be identified.86 Second, only identifiable third parties could be directed by the government to
facilitate electronic surveillance.87 Conducting electronic surveillance frequently requires the
assistance of telecommunications providers, landlords, or other third parties. Furthermore,
telecommunications providers are generally prohibited from assisting in electronic surveillance
for foreign intelligence purposes, except as authorized by FISA.88 In cases where the location or
facility was unknown, the identity of the person needed to assist the government could not be
specified in the order. Therefore, limiting the class of persons that could be directed to assist the
government by a FISA court order effectively limited the reach to known and identifiable
locations.
Section 206 and “Other Persons”
Section 206 of the USA PATRIOT Act amended Section 105(c)(2)(B) of FISA. It authorizes FISA
orders to direct “other persons” to assist with electronic surveillance if “the Court finds, based on
specific facts provided in the application, that the actions of the target ... may have the effect of
thwarting the identification of a specified person.”89 In a technical amendment later that year, the
requirement that the order specify the location of the surveillance was also changed so that this
requirement only applies if the facilities or places are known.90 These modifications have the
effect of permitting FISA orders to direct unspecified individuals to assist the government in
performing electronic surveillance, thus permitting court orders to authorize surveillance of
places or locations that are unknown at the time the order is issued.
Congress further amended this section in the USA PATRIOT Improvement and Reauthorization
Act of 2005 to require that the FISC be notified within 10 days after “surveillance begins to be

84 S.Rept. 108-40 at 4-6. But see Letter from the U.S. Department of Justice to Hon. Patrick J. Leahy, at 5 (Sept. 14,
2009) (acknowledging that the amendment has not yet been relied upon in an investigation).
85 P.L. 107-56, § 206, codified at 50 U.S.C. § 1805(c)(2)(B).
86 See 50 U.S.C. § 1805(c)(1)(B) (2001) (requiring FISA warrants to specify the “nature and location of each of the
facilities or places at which electronic surveillance will be directed”).
87 See 50 U.S.C. § 1805(c)(2)(B) (2001).
88 See 50 U.S.C. §§ 1809(a) and 1810.
89 P.L. 107-56, § 206, codified at 50 U.S.C. § 1805(c)(2)(B).
90 P.L. 107-108, § 314(a)(2)(A).
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directed at any new facility or place.”91 In addition, the FISC must be told the nature and location
of each new facility or place, the facts and circumstances relied upon to justify the new
surveillance, a statement of any proposed minimization procedures (i.e., rules to limit the
government’s acquisition and dissemination of information involving United States citizens) that
differ from those contained in the original application or order, and the total number of facilities
or places subject to surveillance under the authority of the present order.92
Particularity Requirement of the Fourth Amendment
The Fourth Amendment imposes specific requirements to issue warrants authorizing searches of
“persons, houses, papers, and effects.”93 One of the requirements, referred to as the particularity
requirement, states that warrants shall “particularly describ[e] the place to be searched.”94 Under
FISA, roving wiretaps are not required to identify the location that may be subject to surveillance.
Therefore, some may argue that roving wiretaps do not comport with the particularity
requirement of the Fourth Amendment. It is not clear that the Fourth Amendment would require
that searches for foreign intelligence information be supported by a warrant,95 but prior legal
challenges to similar provisions of Title III of the Omnibus Crime Control and Safe Streets Act
may be instructive in the event that challenges to Section 206 are brought alleging violations of
the particularity requirement of the Fourth Amendment.
Similar roving wiretaps have been permitted under Title III since 1986 in cases where the target
of the surveillance takes actions to thwart such surveillance.96 The procedures under Title III are
similar to those currently used under FISA, with two significant differences. First, a roving
wiretap under Title III must definitively identify the target of the surveillance.97 Fixed wiretaps
under Title III and all wiretaps under FISA need only identify the target if the target’s identity is
known. FISA permits roving wiretaps via court orders that only provide a specific description of
the target.98 Second, Title III requires that the surveilled individuals be notified of the
surveillance, generally 90 days after surveillance terminates.99 FISA contains no similar
notification provision.
In United States v. Petti, the U.S. Court of Appeals for the Ninth Circuit considered a challenge to
a roving wiretap under Title III alleging that roving wiretaps do not satisfy the particularity
requirement of the Fourth Amendment.100 The court initially noted that
the test for determining the sufficiency of the warrant description is whether the place to
be searched is described with sufficient particularity to enable the executing officer to

91 P.L. 109-177, § 108(b)(4), codified at 50 U.S.C. § 1805(c)(3). This deadline for notification can be extended to up to
60 days by the FISC upon a showing of good cause.
92 Id.
93 U.S. CONST. amend. IV. The Supreme Court has held that electronic surveillance of private conversations qualifies as
a search for purposes of the Fourth Amendment. See Katz v. United States, 389 U.S. 347 (1967).
94 Id.
95 See supra footnotes 16-17 and accompanying text.
96 Electronic Communications Privacy Act of 1986, P.L. 99-508, § 106(d)(3), codified at 18 U.S.C. § 2518(11).
97 18 U.S.C. § 2518(11)(b)(ii).
98 See 50 U.S.C. §§ 1804(a)(3), 1805(c)(1)(A).
99 18 U.S.C. § 2518(8)(d). This notification may be postponed upon an ex parte showing of good cause.
100 973 F.2d 1441 (9th Cir. 1992).
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locate and identify the premises with reasonable effort, and whether there is any reasonable
probability that another premise might be mistakenly searched.101
Applying this test, the Ninth Circuit held that roving wiretaps under Title III satisfied the
particularity clause of the Fourth Amendment.102 The court relied upon the fact that targets of
roving wiretaps have to be identified and that such wiretaps are only available where the target’s
actions indicate an intent to thwart electronic surveillance.103
Critics of roving wiretaps under FISA may argue that Section 206 increases the likelihood that
innocent conversations will be the subject of electronic surveillance. They may further argue that
the threat of these accidental searches of innocent persons is precisely the type of injury sought to
be prevented by the particularity clause of the Fourth Amendment. Such a threat may be
particularly acute in this case given the fact that there is no requirement under FISA that the target
of a roving wiretap be identified, although the target must be specifically described.104
Effect of Sunset Provisions
As noted above, Congress extended these three FISA amendments until March 15, 2020, but they
have since lapsed. Consequently, the amended FISA authorities have reverted to their text as it
appeared before the enactment of the USA PATRIOT Act. For example, in the context of roving
wiretaps, Section 105(c)(2) of FISA now reads as it did on October 25, 2001,105 eliminating the
authority for FISA court orders to direct other unspecified persons to assist with electronic
surveillance.106 Likewise, regarding FISA orders for the production of documents, Sections 501
and 502 of FISA read as they did on October 25, 2001,107 restricting the types of business records
that are subject to FISA and reinstating the requirement for “specific and articulable facts giving
reason to believe that the person to whom the records pertain is a foreign power or an agent of a
foreign power.”108 Moreover, Section 215’s CDR authority has also lapsed given that it was not
subject to a separate sunset.
However, a grandfather clause applies to each of the three provisions.109 The grandfather clauses
authorize the continued effect of the amendments with respect to investigations that began, or

101 Id. at 1444 (internal quotation marks omitted).
102 Id. at 1445.
103 Id. See also United States v. Bianco, 998 F.2d 1112, 1124 (2d Cir. 1993) (similarly holding constitutional a
provision authorizing roving bugs under Title III).
104 50 U.S.C. §§ 1804(a)(3), 1805(c)(1)(B).
105 P.L. 109-177, § 102(b). The relevant section of FISA will then provide
that, upon the request of the applicant, a specified communication or other common carrier,
landlord, custodian, or other specified person furnish the applicant forthwith all information,
facilities, or technical assistance necessary to accomplish the electronic surveillance in such a
manner as will protect its secrecy and produce a minimum of interference with the services that
such carrier, landlord, custodian, or other person is providing that target of electronic surveillance.
50 U.S.C. § 1805(c)(2) (2001).
106 The sunset will not repeal the provision of FISA that permits a FISA warrant to omit the identity of facilities or
places that will be subject to electronic surveillance. However, the authority for most new roving wiretaps may be
effectively repealed because new orders may not direct unspecified persons to assist with surveillance.
107 P.L. 109-177, § 102(b). Access will then be limited to records held by common carriers, public accommodation
facilities, physical storage facilities, and vehicle rental facilities. 50 U.S.C. § 1862(c)(2) (2001).
108 50 U.S.C. § 1862(b)(2)(B) (2001).
109 None of the extensions have affected the grandfather provisions.
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Origins and Impact of the FISA Provisions That Expired on March 15, 2020

potential offenses that took place, before the provisions’ sunset date.110 Thus, for example, if a
non-U.S. person were engaged in international terrorism before the sunset date, he would still be
considered a “lone wolf” for FISA court orders sought after the provision expired. Similarly, if an
individual was engaged in international terrorism before that date, he may be the target of a
roving wiretap under FISA even if authority for new roving wiretaps expired.

Author Information

Edward C. Liu

Legislative Attorney

Disclaimer
This document was prepared by the Congressional Research Service (CRS). CRS serves as nonpartisan
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under the direction of Congress. Information in a CRS Report should not be relied upon for purposes other
than public understanding of information that has been provided by CRS to Members of Congress in
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110 P.L. 107-56, § 224(b); P.L. 108-458, § 6001(b) (referencing PATRIOT Act sunset provision in P.L. 107-56,
§ 224(b)).
Congressional Research Service
R40138 · VERSION 24 · UPDATED
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