Saving the Open Skies
Treaty: Challenges and
possible scenarios after the
U.S. withdrawal
Dr. Alexander Graef
September 2020
EURO-ATLANTIC SECURITY
POLICY BRIEF
The European Leadership Network (ELN) is an independent, non-partisan,
pan-European NGO with a network of nearly 200 past, present and future
European leaders working to provide practical real-world solutions to
political and security challenges.
About the author
Alexander Graef is a researcher in the project „Arms Control and Emerging
Technologies at the Institute for Peace Research and Security Policy at the University
of Hamburg (IFSH). He received his PhD in 2019 from the University of St. Gallen
(Switzerland) for a thesis on the network of Russian foreign policy experts and think
tanks. His current research focuses on conventional arms control and Russian security
and defense policy.
Support for this publication was provided by a grant from Carnegie Corporation of New York
Published by the European Leadership Network, September 2020
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Published under the Creative Commons Attribution-ShareAlike 4.0
© The ELN 2020
The opinions articulated in this report represent the views of the author, and do not
necessarily reect the position of the European Leadership Network or any of its
members. The ELN’s aim is to encourage debates that will help develop Europes
capacity to address pressing foreign, defence, and security challenges.
Introduction
1. Technical Challenges
2. Treaty Implementation and Quotas
3. Four Future Scenarios
4. Recommendations
Contents
1
2
9
13
15
1 The ELN / Saving the Open Skies Treaty: Challenges and possible scenarios after the U.S. withdrawal
expressed at the obligatory state con-
ference that convened to discuss the
implications of the U.S. decision for the
Treaty.
The current situation is unprecedented.
The United States is the political and
philosophical founding father of the
Treaty,
3
and with 42 ights has the larg-
est annual ight quota.
4
Washington
also frequently conducts shared ights
with European NATO allies on U.S. air-
craft, provides much needed technical
expertise within the Open Skies Con-
sultative Commission (OSCC) – the im-
plementing body of the treaty – and ac-
counts for more than 12% of its budget.
Without U.S. ights and access to U.S.
territory, states will need to re-distribute
ight quotas. Responding to technical
challenges will be important to adapt
the Treaty after the U.S. withdrawal.
Ensuring Russias continued participa-
tion, however, is essential for the Trea-
ty’s survival.
3  For a history of the Open Skies treaty nego-
tiations see for example, Tucker, Jonathan, “Ne-
gotiating Open Skies: A Diplomatic History,” in
Krepon, M. and A. Smithson (eds.), Open Skies,
Open Control and Cooperative Security, (New
York: St. Martin’s Press, 1992) and Jones, Peter,
Open Skies: Transparency, Condence-Building
and the End of the Cold War (Palo Alto: Stanford
University Press, 2014).
4  The treaty sets a xed passive quota for
each member state. This is the maximum num-
ber of ights each state has to allow over its
own territory. The number of ights a state can
conduct is its active quota and cannot exceed
its own passive quota. The distribution of treaty
quotas roughly corresponds to the territorial
size of the states. The state party Russia-
Belarus and the United States need to allow 42
ights each.
Introduction
Signed in March 1992, the Open Skies
Treaty (herein thereafter referred to
as the Treaty) has been in force since
January 2002. It allows 34 states to
conduct joint, unarmed observation
ights over each other’s territory using
sensors with a predened resolution.
Besides providing valuable intelligence,
regular engagement between military
ocers from different states, particu-
larly those in NATO and Russia, contrib-
utes to trust- and condence-building.
On 21 May 2020, the Trump administra-
tion announced that it would leave the
Treaty, pointing to Russian noncompli-
ance as the main reason.
1
The following
day the U.S. submitted an ocial with-
drawal notice to the Treaty depositaries,
Canada and Hungary. The withdrawal
will take effect on 21 November 2020.
Given the benets of the Treaty, most
members publicly have regretted the
U.S. withdrawal decision and rearmed
their own commitment to the Treaty. In
a joint statement, the foreign ministers
of 12 states argued that the Treaty “re-
mains functioning and useful” and that
they would “continue to implement” it.
2
On 6 July 2020, similar positions were
1  Pompeo, Michael R, “On the Treaty on Open
Skies”, Press Release, May 21, 2020, https://
www.state.gov/on-the-treaty-on-open-skies/.
2  Federal Foreign Oce, “Statement of the
Foreign Ministries of Belgium, Czech Republic,
Finland, France, Germany, Greece, Italy, Luxem-
burg, Netherlands, Portugal, Spain and Sweden
on the announcement by the US to withdraw
from the Open Skies Treaty”, May 22, 2020, htt-
ps://www.auswaertiges-amt.de/en/newsroom/
news/joint-declaration-open-skies/2343892.
The ELN / Saving the Open Skies Treaty: Challenges and possible scenarios after the U.S. withdrawal 2
Historically, the Treaty has been an in-
strument for improving military trans-
parency between NATO states and
members of the former Warsaw Pact.
Flight practice still reects this ap-
proach. Since 2002, while NATO mem-
bers agreed not to overy each other,
almost one third of the more than 1,500
ights conducted went over Russia and
Belarus.
5
At the same time, European
member states and Canada remain
concerned about Russias compliance
with the Treaty. Russia, in turn, has re-
cently voiced its discontent with the
ight practice of several Western states,
including the UK, France, and Norway.
6
The member states will address the
technical challenges primarily within
the OSCC. In July 2020, they created a
special informal working group for this
purpose chaired by Finland that is pre-
paring proposals on the future of the
Treaty. Questions about Treaty imple-
mentation will be raised at the upcom-
ing review conference of the Treaty,
which will take place from 7-9 October
2020. Before this, member states will
need to decide the distribution of ac-
tive ight quotas for 2021 at the annual
quota conference scheduled for 5-6 Oc-
tober 2020. The long-term future of the
5  Graef, Alexander & Moritz Kütt, “Visualizing
the Open Skies Treaty”, April 27, 2020, https://
openskies.ights/.
6  Ryzhkov, Sergey, “Vystupleniye na Konfer-
entsii Gosudarstv-uchastnikov Dogovora po
otkrytomu nebu po rassmotreniyu posledstviy
vykhoda SShA iz Dogovora” [Statement at the
Conference of member states to the Treaty on
Open Skies to review the consequences of the
U.S. withdrawal from the Treaty], July 6, 2020,
https://www.mid.ru/foreign_policy/news//
asset_publisher/cKNonkJE02Bw/content/
id/4212382.
Treaty depends on nding agreement
in all three areas: technical challenges,
treaty implementation, and quota distri-
bution.
The long-term future
of the Open Skies
Treaty depends on
nding agreement in all
three areas: technical
challenges, treaty
implementation, and
quota distribution.
Technical Challenges
Aircraft Capacity
The U.S. withdrawal will end all ights
on U.S. aircraft. This affects several
member states who do not possess
their own certied aircraft.
7
They either
lease aircraft from other member states
or conduct shared ights. From 2002 to
2019, European states and Canada con-
ducted 57 overights onboard the U.S.
7  Only nine states currently possess certi-
ed aircraft equipped with sensors. In addition
to the United States and Russia, these are
Bulgaria, Canada, Hungary, Sweden, Romania,
Turkey, and Ukraine. Bulgaria, however, has
stopped ying and is unlikely to resume. The
United Kingdom dismantled its former HS An-
dover aircraft in 2008. Moreover, the so-called
Pod-group (Belgium, Canada, France, Greece,
Italy, Luxembourg, the Netherlands, Norway,
Portugal, and Spain) that had operated a com-
mon “SAMSON” sensor pod attached to the
Lockheed C-130 Hercules aircraft dissolved in
2013. It now consists of France and Canada.
3 The ELN / Saving the Open Skies Treaty: Challenges and possible scenarios after the U.S. withdrawal
OC-135B. In the same period, however,
the U.S. also made use of European air-
craft capacity and conducted 89 shared
quota ights over Russia-Belarus and
Ukraine.
In the future, these places will become
available to other parties and would be
compensation for the loss of shared
ights on U.S. aircraft. In 2021, member
states are expected to certify the new
German Open Skies aircraft, which is
currently undergoing testing. This will
likely improve the situation further.
Nevertheless, without the U.S. OC-135B
it will be dicult to conduct some of
the missions, particularly those over
the vast Russian Siberian territories.
In contrast to U.S. aircraft, which can
conduct long-range ights of more than
6,000 kilometres, European aircraft, for
example, the Swedish Saab-340 and
the Romanian An-30, are multi-engine
turboprop aircraft with a ight range of
less than 3,000 kilometres.
Correspondingly, in the past, most of
the ights over Siberia that took off at
the Baikal International Airport in Ulan-
Ude used the U.S. OC-135B aircraft and
were conducted either unilaterally by
the U.S. or as shared missions with Eu-
ropean partners and Canada. In the fu-
ture, the remaining member states will
have to either reduce the number and
range of missions over Siberia, negoti-
ate new options with Russia for refu-
elling, or use the so-called taxi option,
that is, drawing on Russian long-range
aircraft when conducting overights.
In the future, the
remaining member
states will have to
either reduce the
number and range
of missions over
Siberia, negotiate new
options with Russia for
refuelling, or use the
so-called taxi option.
Unauthorized data sharing
In principle, data collected by sensors
during observation ights are only avail-
able to member states of the Treaty.
8
Nevertheless, Russian ocials have ex-
pressed concerns that NATO members
could continue to provide the U.S. with
imagery from Russia even after its with-
drawal.
9
According to the Head of the
Conventional Arms Control Division at
the Russian Ministry of Foreign Affairs,
Oleg Bushuev, Russia will put this issue
on the OSCC agenda after the U.S. with-
drawal and has already raised its inten-
8  This data is not even shared with interna-
tional organizations, including the OSCE and
NATO.
9  Deputy Foreign Minister Sergey Ryabkov
has argued that such data sharing would be
extremely troublesome” and that Russia would
“need solid guarantees” to the contrary. See
TASS, “Open Skies Treaty data sharing with
US would cause problems, senior diplomat
warns”, May 23, 2020, https://tass.com/poli-
tics/1159657 and TASS, “Other countries may
leave Open Skies Treaty after US, says senior
Russian diplomat”, July 4, 2020, https://tass.
com/politics/1174791.
The ELN / Saving the Open Skies Treaty: Challenges and possible scenarios after the U.S. withdrawal 4
5 The ELN / Saving the Open Skies Treaty: Challenges and possible scenarios after the U.S. withdrawal
tion to do so within the commission. In
his view, there exists “distinct blueprints
and ideas” about how to ensure nonpro-
liferation, but possible technical meas-
ures have not been disclosed.
10
Despite existing procedures for pro-
cessing and storage, verifying that data
are not being shared beyond Treaty
members is a complicated task. At
present, the rolls of analogue photo-
graphic lms are kept in sealed contain-
ers and developed at special national
facilities in the presence of representa-
tives from both the observing and the
observed party. Other Treaty members
can request copies. The same is true
for digital sensor data, currently in use
only on Russian and Romanian aircraft.
The data are saved on removable stor-
age media and processed using equip-
ment that is separated from any other
network and has no wireless connec-
tions. Nevertheless, the production of
unauthorised digital copies is arguably
easier and more dicult to prevent than
in the case of analogue photographs.
Although nding a technical solution is
necessary, the problem is essentially po-
litical. As U.S. technical means are able
to collect data of similar and even bet-
ter quality than the sensors used within
the Treaty, Russia seems to be primar-
ily concerned with its power status vis-
à-vis the United States rather than the
proliferation of sensitive military intel-
ligence. European member states and
10  Valdai Discussion Club, “Netikhiy DON, ili
Komu na vykhod iz otkrytogo neba?” [The not
so quite DON (OST), or who is leaving the Open
Sky?], July 7, 2020, https://www.youtube.com/
watch?v=rG3hM2-M1IY [56:14-59:10].
Canada could mitigate Moscow’s con-
cerns by issuing a public statement to
re-conrm that they will not share Trea-
ty-generated raw data and imagery with
non-member states, and act on it. Such
a commitment would not be veriable
but would be politically signicant.
OSCC Budget and Informal Working
Groups
Finally, the U.S. withdrawal will affect
the work of the OSCC. Currently, the
United States chairs two of the four
informal working groups (IWG) within
the OSCC: the IWG on Sensors (IWGS)
and the IWG on Notications and For-
mats (IWGNF).
11
The former develops
the technically complex certication
procedure for the sensor types that the
Treaty permits.
12
Here the knowledge
of U.S. technical experts and political
leadership have played an important
role, which will be dicult to replace.
For example, from 2005 onwards the
IWGS has worked intensively on certi-
cation procedures for thermal infrared
line scanners to ensure that the ground
resolution would always correspond to
50 centimetres.
13
Similarly, the IWGS
has been essential in implementing the
11  In addition, there are the IWG on Certica-
tions (IWGC) and the IWG on Rules and Proce-
dures (IWGRP).
12  The Open Skies Treaty permits four dif-
ferent sensors types, of which only the rst
two are currently in use: optical panoramic
and framing cameras, video cameras, infrared
line-scanning devices and sideways-looking
synthetic aperture radar. See Treaty on Open
Skies, Art. IV (1), https://www.osce.org/les/f/
documents/1/5/14127.pdf.
13  Spitzer, Hartwig, “News from Open Skies.
A co-operative Treaty maintaining military trans-
parency”, February 2009, Vertic Brief 8, https://
www.les.ethz.ch/isn/97949/BP8_Spitzer.pdf.
The ELN / Saving the Open Skies Treaty: Challenges and possible scenarios after the U.S. withdrawal 6
transition from analogue black-and-
white cameras to digital electro-optical
sensors.
Russian representatives have already
stated that governmental experts need
to have the necessary experience if
they want to replace U.S. staff within
the respective working groups. This
means that, according to Moscow,
the incoming IWG chairs replacing the
U.S. ones need to have been actively
engaged in the implementation of the
Treaty and come from member states
that possess their own aircraft or plan
to acquire one in the near future.
14
These requirements, if implemented by
OSCC members, reduce the number of
possible candidates to just a couple of
states, particularly because Russia and
Germany already chair two informal
working groups.
15
Likely candidates
(with varying political feasibility) are
Bulgaria, Canada, Hungary, Romania,
Sweden, Turkey, and Ukraine.
In addition, the U.S. also contributes
about 12.6% of the OSCC budget. Con-
sequently, once it leaves the Treaty, the
remaining member states will need to
increase their relative shares. Such re-
calculations can be aided by a formula
14  Ryabkov, Sergey, “Vystupleniye na Kon-
ferentsii Gosudarstv-uchastnikov Dogovora po
otkrytomu nebu po rassmotreniyu posledstviy
vykhoda SShA iz Dogovora” [Statement at the
Conference of member states to the Treaty on
Open Skies to review the consequences of the
U.S. withdrawal from the Treaty], July 6, 2020,
https://www.mid.ru/foreign_policy/news//
asset_publisher/cKNonkJE02Bw/content/
id/4212382, pp. 4-5.
15  Germany chairs the IWG on Certications
(IWGC). Russia chairs the IWG on Rules and
Procedures (IWGRP).
based on the so-called OSCE standard
scale of contributions. Its use, however,
is a political decision and requires una-
nimity within the OSCC. If this formula
is applied, the largest contributors be-
yond the U.S. (Germany, France, Italy
and the United Kingdom) will need to in-
crease their share by a maximum of 1.6
percentage points each, from 10.3% to
11.9%, but for the majority of member
states, it will be less than 0.2 percent-
age points.
16
What does this mean in absolute num-
bers? The OSCC does not publish its
annual budget, but extrapolation from
available data suggests the annual
budget is in the range of EUR 700,000 to
1,000,000.
17
Hence, the actual increase
for each member state will vary, but for
most of them, will be below EUR 2,000
per year. Even for Germany, France, Italy
and the United Kingdom, the additional
payment will be less than EUR 17,000.
Despite ocial statements to the
16  The formula draws on the OSCE standard
scale of contributions (formerly the Helsinki
scale) but includes proportional, additional
contributions since not all OSCE members are
simultaneously parties to the Open Skies Treaty.
Post-Soviet states are exempt from these ad-
ditional contributions. See OSCC, 1992, Annex
IV to Decision Number Six, https://2009-2017.
state.gov/documents/organization/106722.
pdf. The OSCE standard scale remained
unchanged for many years, but in April 2019,
member states introduced minimal revisions
(PC.DEC/1325). The estimate above for 2021
incorporates them.
17  Own analysis and compilation based
on “Draft Assessment Report on the EU’s role
vis-à-vis the OSCE”, 15387/1/04 REV, Decem-
ber 10, 2004, http://register.consilium.europa.
eu/pdf/en/04/st15/st15387-re01.en04.pdf. In
2019, Germany provided EUR 67,720.49 to the
OSCC, which given the German share (10.275%)
amounts to a total OSCC budget of about EUR
660,000.
7 The ELN / Saving the Open Skies Treaty: Challenges and possible scenarios after the U.S. withdrawal
The ELN / Saving the Open Skies Treaty: Challenges and possible scenarios after the U.S. withdrawal 8
contrary,
18
the effect of the redistribu-
tion of shares after the U.S. withdrawal
will be negligible.
Despite ocial
statements to the
contrary, the effect of
the redistribution of
shares after the U.S.
withdrawal will be
negligible.
In spite of this, it is likely that the OSCC
budget redistribution will cause con-
troversy among member states for at
least two reasons. Russian representa-
tives have stated that they seek to pre-
serve an OSCC decision from 1992 that
exempts post-Soviet states from ad-
ditional payments to the OSCC on the
top of their basic contribution based
on the OSCE standard scale (formerly
the Helsinki scale).
19
Maintaining this
18  At the Open Skies state conference on
July 6 2020, the Canadian Deputy Permanent
Representative, Veronique Pepin-Halle, argued
that “given the magnitude OF the United States’
contribution to the budget of the Open Skies
Consultative Commission, it is clear that this
impact will be signicant for remaining States
Parties.” See Sevunts, Levon, “Russia accuses
Canada and the U.S. of violating Open Skies
Treaty”, July 10 2020, https://www.cbc.ca/
news/politics/open-skies-russia-canada-united-
states-1.5645987.
19  The exemption applies to Armenia,
Azerbaijan, Belarus, Georgia, Kazakhstan,
Kyrgyzstan, Moldova, the Russia, Tajikistan,
Turkmenistan, Ukraine and Uzbekistan. Only Be-
larus, Georgia, Russia and Ukraine are members
of the Open Skies Treaty, however. Kyrgyzstan
has signed the Treaty but did not ratify it, see
OSCC, 1992, Annex III to Decision Number Six,
practice, which at the time reected the
devastating economic situation in the
former Soviet Union, effectively would
freeze Russias contribution at the cur-
rent level even after the U.S. withdrawal.
Moreover, Russian Deputy Foreign Min-
ister Sergey Ryabkov has argued that
Moscow wants to link its consent to
the OSCC budget with the ocial annul-
ment of Russia’s nancial obligations
to the Joint Consultative Group of the
CFE treaty, which it refused to pay in the
past after withdrawing from it in March
2015.
20
Given Russias improved eco-
nomic performance, ongoing contro-
versies about its Treaty implementation
and its legally questionable suspension
of CFE membership, this approach will
cause much debate.
https://2009-2017.state.gov/documents/or-
ganization/106722.pdf.
20  Vystupleniye na Konferentsii Gosudarstv-
uchastnikov Dogovora po otkrytomu nebu po
rassmotreniyu posledstviy vykhoda SShA iz
Dogovora”, July 6, 2020, https://www.mid.ru/en/
foreign_policy/news/-/asset_publisher/cKNon-
kJE02Bw/content/id/4212382, p. 4.
9 The ELN / Saving the Open Skies Treaty: Challenges and possible scenarios after the U.S. withdrawal
Treaty Implementation
and Quotas
Most member states share the concerns
the United States has raised about Rus-
sias compliance,
21
but are keen to solve
them diplomatically. Russia in turn also
accused several Western members of
violating Treaty provisions.
22
The Treaty
Review Conference scheduled for Octo-
ber 7-9 will look at the issues of state
practice and Treaty implementation
over the past ve years.
Western and Russian concerns
Debates about Treaty implementation
and compliance have been a constant
feature, including controversies about
ight safety, territorial status conicts
and national security concerns.
23
In the
21  U.S. Department of State, “2020 Adher-
ence to and Compliance with Arms Control,
Nonproliferation, and Disarmament Agree-
ments and Commitments”, https://www.state.
gov/2020-adherence-to-and-compliance-with-
arms-control-nonproliferation-and-disarma-
ment-agreements-and-commitments-compli-
ance-report-2/
22  See for example, Ministry of Foreign
Affairs of the Russian Federation, “Treaty on
Open Skies: Questions and Answers”, May
26 2020, https://www.mid.ru/foreign_policy/
international_safety/regprla/-/asset_publisher/
YCxLFJnKuD1W/content/id/4138584?p_p_
id=101_INSTANCE_YCxLFJnKuD1W&_101_IN-
STANCE_YCxLFJnKuD1W_languageId=en_GB
and Kelin, Andrei, “Open Skies Clouded by Sham
and Ambiguity”, July 3 2020, https://www.
rusemb.org.uk/ambarticles/563.
23 Territorial status conicts have been the
most dicult to resolve. For example, Turkey
has consistently vetoed the accession of the
Republic of Cyprus, an EU member state, to
the treaty, because Ankara does not recog-
nize Cyprus’s sovereignty. Another problem is
the status of the Crimean peninsula. In 2014,
Russia invited other parties to overy the ter-
ritory from a designated Open Skies refuelling
last ten years, two major issues are at
the centre of concern: The Russian de-
nial of overights within its 10 kilome-
tre border zone to Georgia established
in May 2010, and the 500-kilometre
sub-limit over the Kaliningrad Oblast
adopted in June 2014.
The rst issue is unrelated to the
Treaty as such but stems from the
conict about the political status of two
Georgian breakaway regions, Abkhazia
and South Ossetia. Russia recognised
the sovereignty of both regions in the
aftermath of its war with Georgia in
August 2008. In light of this recognition,
Russia argues that as a sovereign non-
party state, the restrictions of Article
VI of the Treaty that “[t]he ight path
of an observation aircraft shall not be
closer than […] ten kilometers […] ten
kilometers from the border with an
adjacent State that is not a State Party”
– apply.
24
No other member state of
the Treaty shares this position. To
them, Abkhazia and Ossetia are de jure
Georgian territories and Article VI does
not apply. In turn, Georgia regards the
Russian position as a violation of its
own sovereignty and ceased observing
its Treaty obligations affecting Russia
in April 2012.
aireld. Since the other state parties continue
to view Crimea as part of Ukraine, the peninsula
remains practically outside of treaty provisions.
For an analysis of these and other issues see
Graef, Alexander, “The End of the Open Skies
Treaty and the Politics of Compliance”, July 6
2020, https://www.lawfareblog.com/end-open-
skies-Treaty-and-politics-compliance.
24  See Treaty on Open Skies, Art. VI Sec-
tion 2, https://www.osce.org/les/f/docu-
ments/1/5/14127.pdf.
The ELN / Saving the Open Skies Treaty: Challenges and possible scenarios after the U.S. withdrawal 10
for the operation of the regions airport
and limited air travel.
27
The controversy
arises over whether the Treaty provides
grounds to establish sub-limits for
ights originating from the established
Open Skies airelds, such as Kubinka
(near Moscow). Russia argues that the
number of ights to observe its territory
has not changed and that ecient
observation of the Kaliningrad region
is possible. The remaining members
hold that the sub-limit not only violates
Treaty provisions but decreases
coverage in a militarily sensitive area,
thereby undermining both the ecacy
and the spirit of the Treaty.
In February 2020, Russia allowed a
joined ight by the U.S., Lithuania and
Estonia with a range of 505 kilometres
over the Kaliningrad region, thereby
undermining its own long-held policy.
28
It is unclear whether this was done to
buttress public justication efforts in
the wake of an expected U.S. withdrawal
or whether it represents a genuine sign
of goodwill. Nonetheless, if Russia is
indeed only concerned about the safety
of civilian air trac in a comparatively
small region, the State Parties could
consider broadening the discussion and
revisiting Annex E of the Treaty, which,
among others, regulates procedures for
territories separated from the mainland
27 Ministry of Foreign Affairs of the Russian
Federation, “Treaty on Open Skies: Questions
and Answers”, May 26, 2020, https://www.mid.
ru/foreign_policy/international_safety/regprla/-/
asset_publisher/YCxLFJnKuD1W/content/
id/4138584?p_p_id=101_INSTANCE_YCx-
LFJnKuD1W&_101_INSTANCE_YCxLFJnKuD1W_
languageId=en_GB.
28 Ibid.
In March 2018, Moscow signalled that
it would resume “receiving observation
ights in 10 kilometers contiguous
to two sections of Russias state
border in the Caucasus” and make
them permanent under the condition
“that Georgia implements in good
faith its obligations to accept Russian
observation missions.
25
However, both
parties have not yet been able to nd a
satisfactory solution. A possible way
out could be returning to the status-quo
ante. In fact, even after the Georgian-
Russian war in August 2008, both
states continued to allow ights within
the context of the Treaty, each time
with the UK as a partner. Russia and
Georgia could return to this practice,
but supplement it with an agreement
that the disputed legal status of the two
regions remains unaffected.
26
The second issue concerns diverging
interpretations of certain Treaty
provisions. According to the Russian
Ministry of Foreign Affairs, the
500-kilometre sub-limit was introduced
in reaction to a Polish overight in April
2014, which took an unusually lengthy
path over the small region. Its zigzag
route had allegedly created problems
25 U.S. Department of State, “2019 Adherence
to and Compliance with Arms Control, Nonpro-
liferation, and Disarmament Agreements and
Commitments”, https://www.state.gov/2019-ad-
herence-to-and-compliance-with-arms-control-
nonproliferation-and-disarmament-agreements-
and-commitments-compliance-report/
26 For such a proposal see Frear, Thomas,
“Open Skies: A Status Neutral Approach for
Georgia and Russia”, ELN Policy Brief, August
2017, https://www.europeanleadershipnetwork.
org/wp-content/uploads/2017/10/170623-
FREAR-Open-Skies-Georgia-and-Russia.pdf.
11 The ELN / Saving the Open Skies Treaty: Challenges and possible scenarios after the U.S. withdrawal
they be addressed before the review
conference in October 2020.
29
Flight Quotas in 2021 and beyond
At the quota conference scheduled
for 5-6 October, 2020, member states
will need to nd agreement about the
distribution of active quotas for 2021.
Without a consensus, ights cannot
take place. This happened once before
in October 2017, when the dispute be-
tween Russia and Georgia about the
border issue put on hold all ights for
2018.
30
Russia and Belarus will likely
strive to increase the number of their
common ights across Europe and
Canada, since the U.S. withdrawal from
the Treaty will put an end to ights over
U.S. territory. Russian Deputy Foreign
Minister Sergey Ryabkov has already
expressed his position, however, that
the sum of passive and active quotas
shall remain the same.
31
29  Ryzhkov, Sergey, “Vystupleniye na Kon-
ferentsii Gosudarstv-uchastnikov Dogovora po
otkrytomu nebu po rassmotreniyu posledstviy
vykhoda SShA iz Dogovora” [Statement at the
Conference of member states to the Treaty on
Open Skies to review the consequences of the
U.S. withdrawal from the Treaty], July 6, 2020,
https://www.mid.ru/foreign_policy/news//
asset_publisher/cKNonkJE02Bw/content/
id/4212382, p. 3.
30  Spitzer, Hartwig, “The Open Skies Treaty
as a transparency regime”, Extended version of
a presentation at the International Conference
at the Protestant Academy (June 2018), Loc-
cum/Germany, November 2018, https://www.
bits.de/public/pdf/Open-Skies_2018_11_02_HS-
CS.pdf, p. 7.
31  “Vystupleniye na Konferentsii Gosudarstv-
uchastnikov Dogovora po otkrytomu nebu po
rassmotreniyu posledstviy vykhoda SShA iz
Dogovora”, July 6, 2020, https://www.mid.ru/
foreign_policy/news//asset_publisher/cKNon-
kJE02Bw/content/id/4212382, p. 4.
territory of member states. Here the
phrase “special procedures” as provided
in subparagraph 5 (B) (2) for territories
located more than 600 kilometres from
the mainland could be further specied,
or the threshold itself could be altered
in order to cover territories such as the
Kaliningrad region.
The Russian Foreign Ministry has pub-
lished its own list of accusations. While
most of them are directed against the
United States, others are directed at
European member states and Canada.
At the July state conference, the Head
of the Russian National Nuclear Risk
Reduction Center, Sergey Ryzhkov, spe-
cically argued that in 2015 the United
States had refused the Russian An-30B
access to its territory. The decision
was allegedly supported by Canada
and according to Ryzhkov has not been
changed since then. This comes as
a surprise because Russia has never
conducted ights over either the U.S.
or Canada using the An-30B due to the
limited range of the aircraft. The ight
planned in 2015 would have been an
exception because the long-range Rus-
sian Tu-154M had been under repair.
Ryzhkov also criticised the United King-
dom and France for denying access to
their overseas territories and remarked
that several states, including the United
Kingdom, Norway, and Canada, had
introduced altitude requirements that
would not allow Russia to use the mini-
mal conguration of its sensors. Al-
though Ryzhkov emphasised that these
issues were “not in the focus of atten-
tion”, he “strongly recommended” that
The ELN / Saving the Open Skies Treaty: Challenges and possible scenarios after the U.S. withdrawal 12
These scenarios notwithstanding, a
successful conclusion to the quota
conference could still become an ob-
stacle to progress. Although during the
conference the United States will still
be a member of the Treaty, it is unlikely
that Washington will apply for active
quotas in 2021. Without U.S. ight bids
this year, however, there is the possibil-
ity that Russia may succeed in receiv-
ing one of the four slots for ights over
Georgia. If this happens, Georgia could
once again refuse to give its consent
to the full package of quota distribu-
tions, which would make ights in 2021
impossible. Moreover, Russian Deputy
Foreign Minister Ryabkov indicated that
his country might insist that the con-
ference negotiations proceed without
the United States.
33
This potential con-
ict could bring the underlying political
struggle to the surface. Four different
scenarios for how things might play out
in the next few months are conceivable.
33 “Vystupleniye na Konferentsii Gosudarstv-
uchastnikov Dogovora po otkrytomu nebu po
rassmotreniyu posledstviy vykhoda SShA iz
Dogovora”, July 6, 2020, https://www.mid.ru/
foreign_policy/news//asset_publisher/cKNon-
kJE02Bw/content/id/4212382, p. 4.
At the quota
conference scheduled
for 5-6 October, 2020,
member states will
need to nd agreement
about the distribution
of active quotas for
2021.
This is helpful. It means that Moscow
is content with its overall Treaty quota
(42) and suggests that a redistribution
of previous U.S.-bound ights over Eu-
rope and Canada will be sucient for
Russia and Belarus. Such a redistribu-
tion should be technically possible. It
would affect about six ights per year
and would not require an amendment to
the Treaty text. In any case, Russia and
Belarus have not previously exhausted
their Treaty-allowed maximum ight
quota for most European states, except
Portugal, Spain, and Greece.
32
The Trea-
ty, however, does not require countries
to exhaust their allocation of ights.
Alternatively, Russia-Belarus may there-
fore choose to reduce their annual num-
ber of active ights.
32 According to the Treaty “No State Party
shall conduct more observation ights over the
territory of another State Party than a number
equal to 50 per cent, rounded up to the nearest
whole number, of its own total active quota, or
of the total passive quota of that other State
Party, whichever is less.” See, Treaty on Open
Skies, Art. III, Section I (10), https://www.osce.
org/les/f/documents/1/5/14127.pdf.
13 The ELN / Saving the Open Skies Treaty: Challenges and possible scenarios after the U.S. withdrawal
Four Future
Scenarios
The rst, and currently most optimistic
scenario, would see the United States
withdrawing in November without se-
rious damage to the Treaty. For this
to happen, the remaining Treaty mem-
bers will need to solve the technical
challenges mentioned above and nd
agreement about the quota distribution
for 2021. Russia would need to be pre-
pared to participate in a good-faith dia-
logue on the outstanding compliance
issues.
In the second scenario, several more
member states might follow the U.S.
example and withdraw from the Treaty.
Prime candidates are states like Geor-
gia and the Baltic States that have a low
number of active ights, no certied
aircraft, and a special bilateral secu-
rity relationship with the United States.
Whether the Treaty can survive the exit
of more states depends on their number
and respective level of Treaty participa-
tion. In any case, the Russian reaction
to such a development would be crucial
to the long-term future of the Treaty.
The third scenario would see Russia
and Belarus withdrawing from the Trea-
ty, either immediately following the U.S.
withdrawal or in consequence of sce-
nario two. The former path is unlikely,
given the overall support for the Open
Skies Treaty in Moscow, but the latter
is a realistic option and represents an
active danger. Some experts point out
that, even in the case of a Russian exit,
Belarus would not be obliged to follow
suit.
34
Yet, since Minsk possesses nei-
ther certied aircraft nor sensors and
President Lukashenkos political future
now depends increasingly on Moscow,
that seems unlikely. Without U.S. and
Russian participation, the Treaty would
be nished.
Finally, in a fourth scenario, the United
States could either revoke the with-
drawal decision before 21 November
2020 or rejoin the Treaty under a new
Democratic U.S. administration in
2021. Most member states favour one
of these alternative developments, and
European leaders have called on Wash-
ington to reconsider its position. At a
minimum, such a U-turn would require
Russias return to full compliance with
the Treaty within the next two months.
35
Even if Russia made this commitment,
however, it is dicult to imagine that
the current U.S. administration would
change a long-held policy position just
before or immediately after the Presi-
dential election.
Some U.S. Treaty supporters argue
that the withdrawal decision itself is
illegal because the Trump administra-
tion did not notify Congress 120 days
before submitting its withdrawal no-
34  Bell, Alexandra, Wolfgang Richter & Andrei
Zagorski, “How to x, preserve and strengthen
the Open Skies Treaty”, March 2020, Deep Cuts
Issue Brief 9, https://deepcuts.org/les/pdf/
Deep_Cuts_Issue_Brief_9-Open_Skies_Treaty.
pdf.
35  In his withdrawal statement in May 2020,
Secretary of State Mike Pompeo argued that
“we may, however, reconsider our withdrawal
should Russia return to full compliance with
the Treaty”. See “On the Treaty on Open Skies”,
Press Release, May 21, 2020, https://www.
state.gov/on-the-Treaty-on-open-skies/.
The ELN / Saving the Open Skies Treaty: Challenges and possible scenarios after the U.S. withdrawal 14
tice as enshrined in Section 1234 of
the National Defense Authorization Act
(NDAA) 2020.
36
Although there exists
some legal uncertainty about Presiden-
tial authority when withdrawing from
international agreements, the idea that
Congress could force the administra-
tion to reverse its decision by appealing
to federal court is both unprecedented
and unrealistic.
37
A U.S. return to the Open Skies Treaty
in 2021 is possible, but Russian ocials
have already indicated that Moscow
will not accept a simplied procedure.
38
The United States would need to re-ap-
ply for Treaty membership (whose rati-
cation would require consent by the
U.S. Senate) and, as any new candidate,
would have to accept all previous OSCC
decisions. Moreover, the rules and pro-
visions that are in place currently would
have to be re-negotiated, including the
overall U.S. Treaty quota, the designa-
tion of Open Skies airelds, and the
ight range from them. In turn, if the
remaining member states fail to ad-
dress shared concerns about Russian
Treaty compliance and make progress
36  Engel, Eliot L. & Adam Smith, “Letter to
Secretary of State Mike Pompeo and Secretary
of Defense Mark Esper”, May 22 2020, https://
foreignaffairs.house.gov/2020/5/engel-smith-
denounce-trump-administration-s-illegal-with-
drawal-from-open-skies-Treaty.
37  Anderson, Scott R. & Pranay Vaddi, “When
Can the President Withdraw From the Open
Skies Treaty?”, April 22, 2020, https://www.
lawfareblog.com/when-can-president-withdraw-
open-skies-Treaty.
38  “Vystupleniye na Konferentsii Gosudarstv-
uchastnikov Dogovora po otkrytomu nebu po
rassmotreniyu posledstviy vykhoda SShA iz
Dogovora”, July 6, 2020, https://www.mid.ru/
foreign_policy/news//asset_publisher/cKNon-
kJE02Bw/content/id/4212382, p. 4.
towards resolving them, a U.S. return to
the Treaty would become increasingly
unlikely even under a Democratic Presi-
dent.
If the remaining
member states fail
to address shared
concerns about
Russian Treaty
compliance and
make progress
towards resolving
them, a U.S. return
to the Treaty would
become increasingly
unlikely even under a
Democratic President.
15 The ELN / Saving the Open Skies Treaty: Challenges and possible scenarios after the U.S. withdrawal
Recommendations
If the remaining state parties want to realize the rst aforementioned scenario and
save the Open Skies Treaty after the U.S. withdrawal comes into force in November
2020, they should take the following steps:
1. Reach out to Open Skies Treaty members with either a low number of ac-
tive ights, no certied aircraft and/or a special bilateral security relation-
ship with the United States to convince them to remain in the Treaty. In
particular, emphasise the security benets of the Treaty to these states,
including the possible provision of imagery from overights by all member
states, the lack of alternative national means of verication and the avail-
able intelligence on Russia and Belarus;
2. Express publicly the political will to keep the Treaty in operation, conrm
that sensor data from Open Skies Treaty overights will not be shared with
nonmembers and elaborate on how technical measures can prevent such
proliferation;
3. Actively engage Russia and Belarus in further negotiations about the 500
kilometre sub-limit over the Kaliningrad region. Consider shifting the de-
bate towards a broader discussion about special regulations for territories
separated from the mainland, including but not limited to the specication
of the phrase “special procedures” as provided in Annex E subparagraph 5
(B) (2) to the Treaty;
4. Address the Russian denial of overights within its 10 kilometre border
zone to Georgia established in May 2010, and involve Georgia in talks about
its denial of Russian overights over its territory. Re-visit possible solutions
with third-party mediation that would not impinge on the international sta-
tus of Abkhazia and South Ossetia (status neutrality);
5. Search for possible nancial and organisational solutions to safeguard the
work of the OSCC, including reasonable budget contributions reecting
present economic realities and, if possible, additional, voluntary contribu-
tions in accordance with Annex III to decision number 6 of the OSCC;
6. Evaluate the technical and political feasibility of re-establishing the Pod-
group to enhance aircraft capacity beyond 2020 and consider offering to
use the so-called taxi option, which is the provision of aircraft by the ob-
served party in order to facilitate ights, particularly long-range ights over
Siberia.
The ELN / Saving the Open Skies Treaty: Challenges and possible scenarios after the U.S. withdrawal 16
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