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1 1 (February 18, 2019)

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Can the Department of Defense Build the

Border Wall?



Updated February 18, 2019

UPDATE:   On  February 15, 2019, President Trump issued a proclamation declaring a national
emergency  at the southern border of the United States, and invoking, among other authorities, the
military construction authority provided in 10 US. C. § 2808. At the same time, the White House released
a statement identifying additional fnds that would be made available to build the border wall under 10
US. C. § 284. The Army Corps ofEngineers reprogramming authority at 33 US. C. § 2293 was not
invoked as part of this declaration.
Following the President's declaration of a national emergency, Public Citizen and a collection ofstate
attorneys general/filed suits in federal district courts seeking injunctions prohibiting the use offederal
funds to construct a border wall, beyond the amounts appropriated by Congress for such purposes.
The text of the original post from January 10, 2019, includes a discussion of these three authorities and
follows below.
According to multiple reports, President Trump may be contemplating declaring a national emergency in
order to fund the construction of a physical barrier along the southern border with Mexico. The funding
for such construction has been the focal point of the partial government shutdown that began on
December  22, as Congress has thus far refused the President's demand for $5.7 billion in funding for the
construction of physical barriers by the Department of Homeland Security (DHS) (the lead agency
responsible for deterring illegal border crossings). A number of media outlets have reported that the
President is considering whether to resolve this impasse by directing the Department of Defense (DOD)
to construct border fencing with its existing appropriations. Certain federal statutes potentially provide the
DOD   with limited authority to construct physical barriers along the border. However, the President may
seek to avail himself of broader authorities by declaring a national emergency under the National
Emergencies Act (NEA).  Such a declaration could enable the President to invoke certain emergency
military construction authorities established by the Military Construction Codification Act (MCCA).
Whether  these authorities-individually or in combination-extend to the construction of a border wall
would  present a reviewing court with several questions of first impression.
This Sidebar provides an overview of the NEA; the military construction authorities available in the event
of a declared emergency that the Administration may rely upon to deploy border fencing; and other
statutory authorities that may provide the DOD with the authority to engage in certain construction
                                                                   Congressional Research Service
                                                                     https://crsreports.congress.gov
                                                                                        LSB10242

 CRS Legal Sidebar
 Prepared for Members and
 Committees of Congress

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