 
 
 
 Legal Sidebari 
 
OLC: Congressional Notice Period Prior to 
Withdrawing from Treaty Unconstitutional 
May 18, 2021 
On May 22, 2020, Secretary of State Mike Pom
peo announced the United States’ intent to withdraw from 
the multilateral
 Treaty on Open Skies (Open Skies Treaty), an arms control treaty permitting parties to fly 
over each other’s territories for security surveillance purposes, to the treaty’s parties. But a
 provision of 
t
he National Defense Authorization Act for FY2020 (FY2020 NDAA) required the Secretary to provide 
Congress at least 120-day notice before officially notifying parties to the treaty that the United States 
intended to exercise its right to withdraw under Article XV of the treaty. The Trump Administration 
disregarded the 120-day FY2020 NDAA notification requirement, however, based on
 advice from the 
Office of Legal Counsel (OLC) at the Department of Justice (DOJ) that the FY2020 NDAA provision 
unconstitutionally intruded into presidential prerogatives to execute treaties and conduct diplomacy. 
Withdrawal from the Open Skies Treaty becam
e final on November 22, 2020. OLC released its full 
opinion on the provision in December 2020. This Legal Sidebar discusses the NDAA provision, 
summarizes the OLC opinion, and suggests issues for Congress to consider. For more information on the 
Open Skies Treaty, see CRS Insight IN
10502, The Open Skies Treaty: Background and Issues, by Amy F. 
Woolf. 
Section 1234(a) of the FY2020 NDAA 
Section 1234(a) of the FY2020 NDAA
 (22 U.S.C. § 2593a note) provides that 
(a)  Notification  Required.-Not  later  than  120  days  before  the  provision  of  notice  of  intent  to 
withdraw the United States from the Open Skies Treaty to either treaty depository pursuant to Article 
XV of the Treaty, the Secretary of Defense and the Secretary of State shall jointly submit to the 
congressional  defense  committees  [Committees  on  Armed  Services  and  Appropriations  of  the 
Senate  and  the  House  of  Representatives],  the  Committee  on  Foreign  Affairs  of  the  House  of 
Representatives, and the Committee on Foreign Relations of the Senate a notification that- 
(1) such withdrawal is in the best interests of the United States national security; and 
(2) the other state parties to the Treaty have been consulted with respect to such withdrawal. 
The provision resulted from 
a compromise between the House and Senate. The House version would have 
prohibited the Department of Defense from obligating or expending FY2020 NDAA funds to take any 
Congressional Research Service 
https://crsreports.congress.gov 
LSB10600 
CRS Legal Sidebar 
Prepared for Members and  
 Committees of Congress 
 
  
 
Congressional Research Service 
2 
action to suspend, terminate, or withdraw the United States from the Open Skies Treaty, absent certain 
circumstances. The Senate provision would hav
e modified certain reporting requirements. DO
J advised 
that the House provision would be unconstitutional because the authority to terminate treaties, in its view, 
is an exclusive prerogative of the President. The above provision mandating 120-day prior notice to 
Congress  emerged from conference. 
Upon signing the FY2020 NDAA into law, President Trump issue
d a signing statement objecting to 
section 1234(a), among other provisions, because they “purport to dictate the position of the United States 
in external military and foreign affairs.” With respect to the provision at issue, he
 wrote it 
purports  to  require  congressional  notification  before  providing  Russia  with  a  notice  of  intent  to 
withdraw from the Open Skies Treaty.  I reiterate the longstanding understanding of the executive 
branch that these types of provisions encompass only actions for which such advance certification 
or notification is feasible and consistent with the President’s exclusive constitutional authorities as 
Commander in Chief and as the sole representative of the Nation in foreign affairs. 
Pursuant to section 1234(a), the Trump Administratio
n notified the appropriate congressional committees 
that withdrawal from the Open Skies Treaty is in the U.S. national security interest and that the State 
Department had consulted with other parties, but it did not provide Congress 120-day notice prior to 
officially notifying other parties to the treaty of its intent to withdraw
. Some Members of Congress 
objected to the Trump Administration’s non-compliance with the notice requirement, which allowed it to 
exit the agreement prior to the next presidential inauguration and without permitting Congress to take any 
action on the withdrawal. 
OLC Opinion 
OLC’s opinion on section 1234(a) of the FY2020 NDAA expands on its 
2018 opinion that congressional 
approval was not required for the President to withdraw from t
he North American Free Trade Agreement 
(NAFTA) in accordance with its terms (NAFTA opinion). In its NAFTA opinion, OLC analyzed whether 
further legislative action would be necessary for the President to execute the withdrawal provision in a 
congressional-executive agreement, such as NAFTA, that Congress had approved under t
he Trade Act of 
1974, whi
ch provides that qualifying trade agreements must have termination and withdrawal provisions. 
OLC
 concluded that 
Where an international agreement contains defined procedures for termination or withdrawal and 
Congress approves the agreement without limiting those procedures, the President may invoke the 
right  of  the  United  States  to  terminate  or  withdraw  under  those  procedures  without  the  need  for 
additional congressional authorization. 
That authority
, according to OLC, flows from the President’
s constitutional responsibility to “take Care 
that the Laws be faithfully executed,” as well as his 
“role as ‘the sole organ of the nation in its external 
relations, and its sole representative with foreign nations.’” OLC asserted that “when the President 
invokes a termination provision in a congressional-executive agreement, he is implementing the laws that 
Congress has enacted and exercising his own foreign-affairs powers.”  
In its NAFTA opinion, OLC cited an opinion of the Court of Appeals for the D.C. Circuit (D.C. Circuit) in 
Goldwater v. Carter, a 1979 case in which Members of Congress challenged President Carter’s 
termination of the Mutual Defense Treaty with the Republic of China (Taiwan) after the U.S. recognized 
the People’s Republic of China. The D.C. Circuit
 ruled “that two-thirds Senate consent or majority 
consent in both houses is not necessary to terminate [the Mutual Defense Treaty] in the circumstances” of 
the particular cas
e. Crucial among such circumstances were the President ceasing to recognize Taiwan 
and the Senate having provided advice and consent to the Mutual Defense Treaty, including its 
termination clause. The D.C. Circuit
 emphasized that its intent was not to minimize legislative 
prerogatives in foreign affairs: 
  
Congressional Research Service 
3 
While under the termination clause of this and similar treaties the power of the President to terminate 
may appear theoretically absolute, to think that this is so would be to ignore all historical practices 
in treaty termination and past and current reciprocal relationships between the Chief Executive and 
Congress. The wide variety of roles played by the Executive and the Congress (or the Senate alone) 
in the past termination of treaties teaches us nothing conclusive as to constitutional theory, but it 
instructs us as to what may fairly be contemplated as to the President's future exercise of the treaty 
termination power. Treaty termination is a political act, but political acts are not customarily taken 
without  political  support.  Even  if  formal  advice  and  consent  is  not  constitutionally  required  as  a 
prerequisite  to  termination,  it  might  be  sought.  If  the  Congress  is  completely  ignored,  it  has  its 
arsenal of weapons, as previous Chief Executives have on occasion been sharply reminded. 
The Supreme Court
 vacated the D.C. Circuit’s opinion and remanded the case to the district court with 
instructions to dismiss the complaint, without issuing an opinion. Then-Justice Rehnquist, whose 
concurrence attracted four votes, viewed the issue as a non-justiciabl
e political question. 
The OLC FY2020 NDAA opinion relies on its NAFTA opinion and the 
Goldwater decision by the D.C. 
Circuit. OLC also places great
 weight on the Supreme Court’s 20
15 Zivotofsky v. Kerry opinion, in which 
the Court
 held that the President alone has the constitutional authority to recognize foreign states. 
Consequently, the Court invalidated a
 law requiring the Secretary of State, upon request, to list Israel as 
the place of birth on the passports of U.S. citizens born in Jerusalem, finding that the law 
unconstitutionally forced the President to contradict an earlier statement regarding recognition of 
sovereignty over Jerusalem. “If Congress could command the President to state a recognition position 
inconsistent with his own,” the Court
 wrote, “Congress could override the President’s recognition 
determination.” The majority, however, appeared t
o cabin its opinion to the facts before it, 
and rejected 
the government’s position that Court precedent demonstrated that “the President has ‘exclusive authority 
to conduct diplomatic relations,’ along with ‘the bulk of foreign-affairs powers.’” 
OLC
 asserts in its FY2020 NDAA opinion that, “[a]lthough Congress may legislate on topics that affect 
foreign affairs, Congress’s authority does not extend to regulating the President’s decision to exercise a 
right of the United States to withdraw from a treaty.” OLC
 explains that, in addition to vesting the 
President with the 
“executive Power” of the United States, the Constitution also confers express foreign 
affairs powers, including the “power to direct the military as 
‘Commander in Chief’; to 
‘make’ treaties, 
after receiving the advice and consent of the Senate; to
 appoint ‘Ambassadors,’ ‘public Ministers and 
Consuls’; and t
o receive ‘Ambassadors and other Public Ministers.’” These powers combi
ned, according 
to OLC, “grant the President the authority and discretion to implement a treaty by notifying foreign 
powers of the United States’ exercise of its right to withdraw from the treaty.” OLC
 asserts that the 
Constitution “does not provide Congress with any parallel responsibility.” 
In OLC’s
 view, historical precedent supports the President’s exclusive role in terminating treaties. While 
identifying instances of congressional involvement in the termination of treaties, OLC
 concludes that “the 
modern practice stands decidedly to the contrary, and even those earlier examples do not support the 
conclusion that Congress may require the United States to remain in a treaty longer than the President 
deems in the national interest.” OLC
 identifies two modern instances where the Senate or Congress made 
efforts to regulate termination of international agreements, but Congress appears to have acquiesced to 
executive branch push-back on constitutional grounds (though other factors were also at play). Separately, 
with respect to the 1986 passage of the Comprehensive Anti-Apartheid Act over President Reagan’s veto, 
which required the Secretary of State to terminate an air services agreement with South Africa, OLC
 notes 
executive branch objection on constitutional grounds. (The Secretary ultimately
 complied with the 
statute).  
As to earlier incidents demonstrating congressional participation, OLC
 finds “the most salient lesson 
arises from what the history does not contain” that is, “[a]lthough Presidents from time to time have acted 
consistently with congressional requests to terminate treaties, we are not aware of any instance in which a 
treaty has been allowed to endure based upon congressional action contrary to the President’s wishes.” 
  
Congressional Research Service 
4 
And, it
 remarked “[t]he fact that Presidents in some instances acted consistently with congressional 
directives does not establish that the directives themselves were constitutionally permissible.” OLC 
believes instead that “[t]he few examples where the President complied with the directives may further 
indicate nothing more than that the President agreed with those measures as a matter of policy” and can 
apparently be dismissed as far as constitutional precedent is concerned.
 Likewise, “episodes . . .where 
Presidents accepted or invited congressional involvement in treaty termination. . .do not support an 
affirmative power of Congress to regulate the President’s action over his objection.” While it may be 
argued instead that precedent seems to cut both ways, OLC’s approach seems to find some support in 
Zivotofsky. 
Issues for Congress 
OLC opinio
ns are binding for the executive branch. Consequently, unless the OLC NDAA opinion is 
rescinded, it seems likely that the executive branch will resist any future efforts by Congress to delay or 
otherwise affect the possible U.S. termination of an international agreement. The Supreme Court 
frequently applies th
e Youngstown formula, whereby a presidential action contrary to congressional 
enactment survives judicial inquiry only if Congress is constitutionally disabled from acting on the matter 
because the President has exclusive and preclusive authority under the Constitution. It may be noteworthy 
that no court has gone so far as to find that Congress is constitutionally disabled from acting with respect 
to the termination or implementation of treaties on the international plane or that the President holds 
exclusive and preclusive power over the same. (OLC appears t
o concede that Congress often enacts 
implementing legislation for international agreements and can also effectively abrogate a treaty by 
enacting inconsistent legislation, but suggests the effects of such actions are limited to the domestic 
realm, at least unless there is som
e relation to the “regulation of war, foreign commerce, immigration, or 
any other power of Congress”). Some commentator
s argue that these are shared powers. 
While it seems well established that the President has the sole power to 
conduct international diplomacy, 
it is not clear that Congress may never influence the content or timing of diplomatic communications. 
Even if 
Zivotofsky extends beyond matters involving the recognition power, it is not clear that delaying a 
diplomatic communication is tantamount to directing the executive branch to contradict itself in 
conducting diplomacy. Consequently, Congress may choose to legislate with respect to the potential 
termination of a treaty and, if such legislation is crafted in such a way as to be enforceable, await a 
potential judicial determination regarding its constitutional powers. Congress may also choose to accord 
legitimacy to the OLC views on executive foreign affairs power and avoid future efforts to regulate the 
termination of a treaty. 
 
Author Information 
 Jennifer K. Elsea 
   
Legislative Attorney  
 
 
 
Disclaimer
  
Congressional Research Service 
5 
This document was prepared by the Congressional Research Service (CRS). CRS serves as nonpartisan shared staff 
to congressional committees and Members of Congress. It operates solely at the behest of and 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 connection with CRS’s institutional role. 
CRS Reports, as a work of the United States Government, are not subject to copyright protection in the United 
States. Any CRS Report may be reproduced and distributed in its entirety without permission from CRS. However, 
as a CRS Report may include copyrighted images or material from a third party, you may need to obtain the 
permission of the copyright holder if you wish to copy or otherwise use copyrighted material. 
 
LSB10600 · VERSION 1 · NEW