# Border Security and Military Support: Legal Authorizations and Restrictions

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URL: https://www.frixlaw.com/law-library/documents/crs%3ARS22443

## Record

- **Collection:** Congressional research report
- **Document type:** CRS Report
- **Published:** December 14, 2006
- **Citation:** RS22443

## Text

Border Security and Military Support:
Legal Authorizations and Restrictions
name redacted

December 14, 2006

Congressional Research Service
7-....
www.crs.gov
RS22443

CRS Report for Congress
Prepared for Members and Committees of Congress

Border Security and Military Support: Legal Authorizations and Restrictions

Summary
The military generally provides support to law enforcement and immigration authorities along the
southern border. Reported escalations in criminal activity and illegal immigration, however, have
prompted some lawmakers to reevaluate the extent and type of military support that occurs in the
border region. On May 15, 2006, President Bush announced that up to 6,000 National Guard
troops would be sent to the border to support the Border Patrol. Addressing domestic laws and
activities with the military, however, might run afoul of the Posse Comitatus Act, which prohibits
use of the armed forces to perform the tasks of civilian law enforcement unless explicitly
authorized. There are alternative legal authorities for deploying the National Guard, and the
precise scope of permitted activities and funds may vary with the authority exercised. This report
will be updated as warranted.

Congressional Research Service

Border Security and Military Support: Legal Authorizations and Restrictions

Contents
Background ..........................................................................................................................1
Military Assistance Along the Border ....................................................................................2
Restrictions .....................................................................................................................2
Authorizations ................................................................................................................2
The National Guard...............................................................................................................4
State Drug Plan ...............................................................................................................4
Other Duty......................................................................................................................5
Homeland Defense Activity ............................................................................................5

Contacts
Author Contact Information ........................................................................................................6

Congressional Research Service

Border Security and Military Support: Legal Authorizations and Restrictions

Background
The Secretary of the Department of Homeland Security (DHS) is charged with preventing the
entry of terrorists, securing the borders, and carrying out immigration enforcement functions. The
Department of Defense’s (DOD) role in the execution of this responsibility is to provide support
to DHS and other federal, state and local (and in some cases foreign) law enforcement agencies,
when requested. Since the 1980s, the DOD (and National Guard), as authorized by Congress, has
conducted a wide variety of counterdrug support missions along the borders of the United States.
After the attacks of September 11, 2001, military support was expanded to include
counterterrorism activities. Although the DOD does not have the “assigned responsibility to stop
terrorists from coming across our borders,”1 its support role in counterdrug and counterterrorism
efforts appears to have increased the Department’s profile in border security.
Some states, particularly those along the southern border that are experiencing reported
escalations in crime and illegal immigration, are welcoming the increased military role and have
taken steps to procure additional military resources. Governor Janet Napolitano of Arizona, for
example, sent the DOD a request for federal funding to support the state’s deployment of National
Guard troops to the border after reportedly exhausting available state resources for combating
illegal immigration and drug trafficking.2 Others view the increased presence of military support
along the borders as undiplomatic, potentially dangerous,3 and a further strain on already
overextended military resources.4 Nonetheless, the concerns over aliens and smugglers exploiting
the porous southern border continue to grow, and some now argue that the military should play a
much larger and more direct role in border security.
On May 15, 2006, President Bush announced that up to 6,000 National Guard troops would be
sent to the southern border to support the Border Patrol. According to the President, the Guard
will assist the Border Patrol by operating surveillance systems, analyzing intelligence, installing
fences and vehicle barriers, building roads, and providing training.5 Guard units will not be
involved in direct law-enforcement activities and will be under the control of the Governors. The
Administration has indicated that the vast majority of the force at the border would be drawn
from Guardsmen performing their regularly scheduled, two- or three-week annual training,
pursuant to Title 32 of the U.S. Code (see later discussion). 6 Initial deployments of Guardsmen to
the border began in June 2006 under the mission name, “Operation Jump Start.” As of November
2006, approximately 5661 guardsmen were participating in the mission.7

1

Dep’t. of Defense, Strategy for Homeland Defense and Civil Support, at 5 (June 2005) available at
http://www.fas.org/irp/agency/dod/homeland.pdf.
2
See http://azgovernor.gov/dms/upload/NR_030706%20Rumsfeld_Chertoff%20Letter.pdf.
3
In 1997, a Marine who was part of a four-man border observation team near Redford, Texas, shot and fatally
wounded an 18-year old man after reportedly taking fire. See Oversight Investigation of the Death of Esequiel
Hernandez, Jr., A Report of Chairman Lamar Smith to the Subcommittee on Immigration and Claims of the Committee
on the Judiciary, 105th Cong. 2d Sess. (Nov. 1998).
4
Peter Baker, Bush Set to Send Guard to Border, THE WASHINGTON POST, May 15, 2006.
5
Stephen Dinan, Bush Calls for Guard on Border, THE WASHINGTON TIMES, May 16, 2006.
6

The White House, Press Briefing on the President’s Immigration Reform Plan, May 16, 2006, available at
http://www.whitehouse.gov/news/releases/2006/05/20060516-2.html.
7
See CRS Report RS22451, National Guard Personnel and Deployments: Fact Sheet, by (name redacted) and
JoAnne O’Bryant.

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Border Security and Military Support: Legal Authorizations and Restrictions

In the 109th Congress, Senate-passed S. 2611 and House-passed H.R. 5122, as well as H.R. 1986,
H.R. 3938, and H.R. 3333, would have authorized, under certain parameters, the use of military
forces or the National Guard along the border.

Military Assistance Along the Border
The military does not appear to have a direct legislative mandate to protect or patrol the border or
to engage in immigration enforcement. Indeed, direct military involvement in law enforcement
activities without proper statutory authorization might run afoul of the Posse Comitatus Act.8 The
military does have, however, general legislative authority that allows it to provide support to
federal, state, and local law enforcement agencies (LEA) in counterdrug and counterterrorism
efforts, which might indirectly provide border security and immigration control assistance.
Military personnel for these operations are drawn from the active and reserve forces of the
military and from the National Guard.

Restrictions
The primary restriction on military participation in civilian law enforcement activities is the Posse
Comitatus Act (PCA).9 The PCA prohibits the use of the Army and Air Force to execute the
domestic laws of the United States except where expressly authorized by the Constitution or
Congress. The PCA has been further applied to the Navy and Marine Corps by legislative and
administrative supplements. For example, 10 U.S.C. §375, directs the Secretary of Defense to
promulgate regulations forbidding the direct participation “by a member of the Army, Navy, Air
Force, or Marines in a search, seizure, arrest, or other similar activity” during support activities to
civilian law enforcement agencies. DOD issued Directive 5525.5, which outlines its policies and
procedures for supporting federal, state, and local LEAs. According to the Directive, the
following forms of direct assistance are prohibited: (1) interdiction of a vehicle, vessel, aircraft,
or other similar activity; (2) a search or seizure; (3) an arrest, apprehension, stop and frisk, or
similar activity; and (4) use of military personnel in the pursuit of individuals, or as undercover
agents, informants, investigators, or interrogators. It is generally accepted that the PCA does not
apply to the actions of the National Guard when not in federal service.10 As a matter of policy,
however, National Guard regulations stipulate that its personnel are not, except for exigent
circumstances or as otherwise authorized, to directly participate in the arrest or search of suspects
or the general public.11

Authorizations
The PCA does not apply “in cases and under circumstances expressly authorized by the
Constitution.” Under the Constitution, Congress is empowered to call forth the militia to execute
the laws of the Union.12 The Constitution, however, contains no provision expressly authorizing
8

For a more complete discussion of the Posse Comitatus Act, see CRS Report 95-964, The Posse Comitatus Act and
Related Matters: The Use of the Military to Execute Civilian Law, by (name redacted).
9
18 U.S.C. §1385.
10
See CRS Report 95-964, at 42 (citing numerous cases); see also DOD Directive 5525.5.
11
NGR 500-2/ANGI 10-801, National Guard Counterdrug Support, March 31, 2000.
12
U.S. Const. Art. I, §8, cl. 15. In addition, the PCA does not apply to actions furthering a military purpose. See CRS
Report 95-964, at 31 (describing the exception).

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the President to use the military to execute the law. The question of whether the constitutional
exception includes instances where the President is acting under implied or inherent constitutional
powers is one the courts have yet to answer. DOD regulations, nonetheless, do assert two
constitutionally based exceptions—sudden emergencies and protection of federal property.13 The
PCA also does not apply where Congress has expressly authorized use of the military to execute
the law. Congress has done so in three ways: by giving a branch of the armed forces civilian law
enforcement authority (e.g., the Coast Guard), by addressing certain circumstances with more
narrowly crafted legislation, 14 and by establishing general rules for certain types of assistance.
The military indirectly supports border security and immigration control efforts under general
legislation that authorizes the armed forces to support federal, state, and local LEAs. Since the
early 1980s, Congress has periodically authorized an expanded role for the military in providing
support to LEAs. Basic authority for most DOD assistance was originally passed in 1981 and is
contained in Chapter 18 of Title 10 of the U.S. Code—Military Support for Civilian Law
Enforcement Agencies. Under Chapter 18 of Title 10, Congress authorizes DOD to share
information (§371); loan equipment and facilities (§372); provide expert advice and training
(§373); and maintain and operate equipment (§374). For federal LEAs, DOD personnel may be
made available, under §374, to maintain and operate equipment in conjunction with
counterterrorism operations (including the rendition of a suspected terrorist from a foreign
country) or the enforcement of counterdrug laws, immigration laws, and customs requirements.
For any civilian LEA, §374 allows DOD personnel to maintain and operate equipment for a
variety of purposes, including aerial reconnaissance and the detection, monitoring, and
communication of air and sea traffic, and of surface traffic outside the United States or within
25 miles of U.S. borders, if first detected outside the border. Congress placed several stipulations
on Chapter 18 assistance, e.g., LEAs must reimburse DOD for the support it provides unless the
support “is provided in the normal course of military training or operations” or if it “results in a
benefit...substantially equivalent to that which would otherwise be obtained from military
operations or training.”15 Pursuant to §376, DOD can only provide such assistance if it does not
adversely affect “the military preparedness of the United States.” Congress incorporated posse
comitatus restrictions into Chapter 18 activities in §375.
In 1989, Congress began to expand the military’s support role. For example, Congress directed
DOD, to the maximum extent practicable, to conduct military training exercises in druginterdiction areas, and made the DOD the lead federal agency for the detection and monitoring of
aerial and maritime transit of illegal drugs into the United States.16 Congress later provided
additional authorities for military support to LEAs specifically for counterdrug purposes in the
National Defense Authorization Act for FY1991.17 Section 1004 authorized DOD to extend
support in several areas to any federal, state, and local (and sometimes foreign) LEA requesting
counterdrug assistance. This section has been extended regularly and is now in force through the
end of FY2011.18
13

32 C.F.R. §215.4.
See, e.g., 10 U.S.C. §§ 331-333 (to suppress insurrections).
15
10 U.S.C. §377.
16
National Defense Authorization Act for FY1990 and 1991, P.L. 101-189, Div. A, Tit. XII, §1202(a)(1), codified at
10 U.S.C. §124. A similar provision was first passed as part of the National Defense Authorization for FY1989 (P.L.
100-456), but was repealed by P.L. 101-189.
17
P.L. 101-510, Div. A, Tit. X, §1004, codified at 10 U.S.C. §374 note.
18
P.L. 109-364, Div. A, Tit. X, §1021 (extending §1004 through FY2011).
14

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Border Security and Military Support: Legal Authorizations and Restrictions

As amended, §1004 authorizes the military to: maintain, upgrade, and repair military equipment;
transport federal, state, local, and foreign law enforcement personnel and equipment within or
outside the U.S.; establish bases for operations or training; train law enforcement personnel in
counterdrug activities; detect, monitor, and communicate movements of air, sea, and surface
traffic outside the U.S., and within 25 miles of the border if the detection occurred outside the
U.S.; construct roads, fences, and lighting along U.S. border; provide linguists and intelligence
analysis services; conduct aerial and ground reconnaissance; and establish command, control,
communication, and computer networks for improved integration of law enforcement, active
military, and National Guard activities. Section 1004 incorporates the posse comitatus restrictions
of Chapter 18.19 Unlike Chapter 18, however, this law does allow support which could affect
military readiness in the short-term, provided the Secretary of Defense believes the support
outweighs such short-term adverse effect.

The National Guard
The National Guard is a military force that is shared by the states and the federal government
and often assists in counterdrug and counterrrorism efforts. After September 11, for example,
President Bush deployed roughly 1,600 National Guard troops for six-months under Title 10
authority to support federal border officials and provide a heightened security presence. 20 Under
“Title 10 duty status,” National Guard personnel operate under the control of the President,
receive federal pay and benefits, and are subject to the PCA.21 Typically, however, the National
Guard operates under the control of state and territorial Governors. In “state active duty” National
Guard personnel operate under the control of their Governor, are paid according to state law, can
perform activities authorized by state law, and are not subject to the restrictions of the PCA.
Because border security is primarily a federal concern, some states have looked to the federal
government for funding to support some of their National Guard activities. Under Title 32 of the
U.S. Code, National Guard personnel generally serve a federal purpose and receive federal pay
and benefits, but command and control remains with the Governor. This type of service is
commonly referred to as “Title 32 duty status,” and examples are discussed below. According to
the Administration, the deployment of the 6,000 Guardsmen derives its authority from 32 U.S.C.
§502(a), which allows the Secretary of the Army and Air Force to prescribe regulations for
National Guard drill and training and §502(f), described below. 22

State Drug Plan
Federal funding may be provided to a state for the implementation of a drug interdiction program
in accordance with 32 U.S.C. §112. Under this section, the Secretary of Defense may grant
funding to the Governor of a state who submits a “drug interdiction and counterdrug activities
19

Id. at §1021(g).

20

Maj. Gen. Timothy J. Lowenberg, The Role of the National Guard in National Defense and Homeland Security,
(Sept. 2005) available at http://www.findarticles.com/p/articles/mi_qa3731/is_200509/ai_n15638615/print [hereinafter
Lowenberg, The Role of the National Guard].
21
10 U.S.C. §§12301-12304. However, it appears that the National Guard could be deployed by the President under 10
U.S.C. §§331-333 and §12406 to “execute the laws of the United States.”
22
Memorandum of Agreement between the States of Arizona, California, New Mexico, and Texas and the Department
of Defense, Operation Jump Start (June 2, 2006).

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plan” that satisfies certain statutory requirements. The Secretary of Defense is charged with
examining the sufficiency of the drug interdiction plan and determining whether the distribution
of funds would be proper. While the emphasis is certainly on counterdrug efforts, a state plan
might include some related border security and immigration-related functions that overlap with
drug interdiction activities. Arizona’s drug interdiction plan, for example, recognizes related
border issues created by human smuggling and terrain vulnerabilities with respect to the illegal
entry of aliens into the United States.23 By approving the State of Arizona’s drug interdiction plan,
the Secretary of Defense has enabled the Arizona National Guard to engage in some border
security measures.

Other Duty
Section 502(f) of Title 32 has been used to expand the operational scope of the National Guard
beyond its specified duties. This provision provides that “a member of the National Guard may ...
without his consent, but with the pay and allowances provided by law ... be ordered to perform
training or other duty” in addition to those he is already prescribed to perform (emphasis added).
This is the provision of law that was used to provide federal pay and benefits to the National
Guard personnel who provided security at many of the nation’s airports after September 11 and
who participated in Katrina and Rita-related disaster relief operations. States, such as Arizona,
have argued that the “other duty” language should be liberally applied (like it was for Hurricane
Katrina and Rita) to include activities associated with border security efforts.24 Some question,
however, whether domestic operations, in general, are a proper use of this Title 32 authority.25

Homeland Defense Activity
In 2004, Congress passed another law that could arguably provide federal funding for National
Guard personnel conducting border security operations under Title 32.26 Chapter 9 of Title 32 of
the U.S. Code authorizes the Secretary of Defense to provide federal funding at his discretion to a
state, under the authority of the Governor of that state, for the use of their National Guard forces
if there is a “necessary and appropriate” “homeland defense activity.”27 A “homeland defense
activity” is statutorily defined as “an activity undertaken for the military protection of the territory
or domestic population of the United States ... from a threat or aggression against the United
States.” Although a deployment of National Guard troops for border security purposes could
arguably be an activity “undertaken for the military protection” of a “domestic population,” it is
unclear whether the porous nature of the border or illegal entry of aliens is the type of “threat” or
“aggression” that would be “necessary and appropriate” for National Guard troops. The State of
Arizona requested federal funds for its National Guard under Chapter 9 for the performance of
homeland defense-border security activities.

23
State of Arizona, Press Release, Title 32: Statutory Funding Options (Mar. 6, 2006) http://azgovernor.gov/dms/
upload/NR_030906_%20Border%20Veto%20Legal%20Support%20Letter.pdf.
24
Id.
25
Lowenberg, The Role of the National Guard.
26
Defense Authorization Act for Fiscal Year 2005, P.L. 108-375, Div. A, Tit. V, Subtitle B, §§901-908.
27
32 U.S.C. §905.

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Author Contact Information
(name redacted)

Congressional Research Service

6

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Source: Frix Law Library, https://www.frixlaw.com/law-library/documents/crs%3ARS22443. Public record. Not legal advice.
