Treaty

Comprehensive Nuclear-Test-Ban Treaty

PartiesParties with a link have a reservation.

Party Signature RatificationS=Signature without reservation or requirement of ratification R=Ratification, Acceptance, Approval or Notification A=Accession Su=Succession NK=Not Known Entry into force Renunciation Termination
Afghanistan 24-09-2003 24-09-2003 (R)
Albania 27-09-1996 23-04-2003 (R)
Algeria 15-10-1996 11-07-2003 (R)
Andorra 24-09-1996 12-07-2006 (R)
Angola 27-09-1996 20-03-2015 (R)
Antigua and Barbuda 16-04-1997 11-01-2006 (R)
Argentina 24-09-1996 04-12-1998 (R)
Armenia 01-10-1996 12-07-2006 (R)
Australia 24-09-1996 09-07-1998 (R)
Austria 24-09-1996 13-03-1998 (R)
Azerbaijan 28-07-1997 02-02-1999 (R)
Bahamas 04-02-2005 30-11-2007 (R)
Bahrain 24-09-1996 12-04-2004 (R)
Bangladesh 24-10-1996 08-03-2000 (R)
Barbados 14-01-2008 14-01-2008 (R)
Belarus 24-09-1996 13-09-2000 (R)
Belgium 24-09-1996 29-06-1999 (R)
Belize 14-11-2001 26-03-2004 (R)
Benin 27-09-1996 06-03-2001 (R)
Bolivia 24-09-1996 04-10-1999 (R)
Bosnia and Herzegovina 24-09-1996 26-10-2006 (R)
Botswana 16-09-2002 28-10-2002 (R)
Brazil 24-09-1996 24-07-1998 (R)
Brunei 22-01-1997 10-01-2013 (R)
Bulgaria 24-09-1996 29-09-1999 (R)
Burkina Faso 27-09-1996 17-04-2002 (R)
Burundi 24-09-1996 24-09-2008 (R)
Cabo Verde 01-10-1996 01-03-2006 (R)
Cambodia 26-09-1996 10-11-2000 (R)
Cameroon 16-11-2001 06-02-2006 (R)
Canada 24-09-1996 18-12-1998 (R)
Central African Republic 19-12-2001 26-05-2010 (R)
Chad 08-10-1996 08-02-2013 (R)
Chile 24-09-1996 12-07-2000 (R)
China 24-09-1996
Colombia 24-09-1996 29-01-2008 (R)
Comoros 12-12-1996 19-02-2021 (R)
Cook Islands 05-12-1997 06-09-2005 (R)
Costa Rica 24-09-1996 25-09-2001 (R)
Côte d'Ivoire 25-09-1996 11-03-2003 (R)
Croatia 24-09-1996 02-03-2001 (R)
Cuba 04-02-2021 04-02-2021 (R)
Cyprus 24-09-1996 18-07-2003 (R)
Czech Republic 12-11-1996 11-09-1997 (R)
Democratic Republic of the Congo 04-10-1996 28-09-2004 (R)
Denmark 24-09-1996 21-12-1998 (R)
Djibouti 21-10-1996 15-07-2005 (R)
Dominica 25-05-2022 30-06-2022 (R)
Dominican Republic 03-10-1996 04-09-2007 (R)
Ecuador 24-09-1996 12-11-2001 (R)
Egypt 14-10-1996
El Salvador 24-09-1996 11-09-1998 (R)
Equatorial Guinea 09-10-1996 21-09-2022 (R)
Eritrea 11-11-2003 11-11-2003 (R)
Estonia 20-11-1996 13-08-1999 (R)
Eswatini 24-09-1996 21-09-2016 (R)
Ethiopia 25-09-1996 08-08-2006 (R)
Federated States of Micronesia 24-09-1996 25-07-1997 (R)
Fiji 24-09-1996 10-10-1996 (R)
Finland 24-09-1996 15-01-1999 (R)
France 24-09-1996 06-04-1998 (R)
Gabon 07-10-1996 20-09-2000 (R)
Gambia, The 09-04-2003 24-03-2022 (R)
Georgia 24-09-1996 27-09-2002 (R)
Germany 24-09-1996 20-08-1998 (R)
Ghana 03-10-1996 14-06-2011 (R)
Greece 24-09-1996 21-04-1999 (R)
Grenada 10-10-1996 19-08-1998 (R)
Guatemala 20-09-1999 12-01-2012 (R)
Guinea 03-10-1996 22-09-2011 (R)
Guinea-Bissau 11-04-1997 24-09-2013 (R)
Guyana 07-09-2000 07-03-2001 (R)
Haïti 24-09-1996 01-12-2005 (R)
Holy See 24-09-1996 18-07-2001 (R)
Honduras 25-09-1996 30-10-2003 (R)
Hungary 25-09-1996 13-07-1999 (R)
Iceland 24-09-1996 26-06-2000 (R)
Indonesia 24-09-1996 06-02-2012 (R)
Iran 24-09-1996
Iraq 19-08-2008 26-09-2013 (R)
Ireland 24-09-1996 15-07-1999 (R)
Israel 25-09-1996
Italy 24-09-1996 01-02-1999 (R)
Jamaica 11-11-1996 13-11-2001 (R)
Japan 24-09-1996 08-07-1997 (R)
Jordan 26-09-1996 25-08-1998 (R)
Kazakhstan 30-09-1996 14-05-2002 (R)
Kenya 14-11-1996 30-11-2000 (R)
Kiribati 07-09-2000 07-09-2000 (R)
Kuwait 24-09-1996 06-05-2003 (R)
Kyrgyzstan 08-10-1996 02-10-2003 (R)
Laos 30-07-1997 05-10-2000 (R)
Latvia 24-09-1996 20-11-2001 (R)
Lebanon 16-09-2005 21-11-2008 (R)
Lesotho 30-09-1996 14-09-1999 (R)
Liberia 01-10-1996 17-08-2009 (R)
Libya 13-11-2001 06-01-2004 (R)
Liechtenstein 27-09-1996 21-09-2004 (R)
Lithuania 07-10-1996 07-02-2000 (R)
Luxembourg 24-09-1996 26-05-1999 (R)
Madagascar 09-10-1996 15-09-2005 (R)
Malawi 09-10-1996 21-11-2008 (R)
Malaysia 23-07-1998 17-01-2008 (R)
Maldives 01-10-1997 07-09-2000 (R)
Mali 18-02-1997 04-08-1999 (R)
Malta 24-09-1996 23-07-2001 (R)
Marshall Islands 24-09-1996 28-10-2009 (R)
Mauritania 24-09-1996 30-04-2003 (R)
Mexico 24-09-1996 05-10-1999 (R)
Moldova 24-09-1997 16-01-2007 (R)
Monaco 01-10-1996 18-12-1998 (R)
Mongolia 01-10-1996 08-08-1997 (R)
Montenegro 23-10-2006 (Su)
Morocco 24-09-1996 17-04-2000 (R)
Mozambique 26-09-1996 04-11-2008 (R)
Myanmar 25-11-1996 21-09-2016 (R)
Namibia 24-09-1996 29-06-2001 (R)
Nauru 08-09-2000 12-11-2001 (R)
Nepal 08-10-1996
Netherlands, the Kingdom of the 24-09-1996 23-03-1999 (R)
New Zealand 27-09-1996 19-03-1999 (R)
Nicaragua 24-09-1996 05-12-2000 (R)
Niger 03-10-1996 09-09-2002 (R)
Nigeria 08-09-2000 27-09-2001 (R)
Niue 09-04-2012 04-03-2014 (R)
North Macedonia 29-10-1998 14-03-2000 (R)
Norway 24-09-1996 15-07-1999 (R)
Oman 23-09-1999 13-06-2003 (R)
Palau 12-08-2003 01-08-2007 (R)
Panama 24-09-1996 23-03-1999 (R)
Papua New Guinea 25-09-1996 13-03-2024 (R)
Paraguay 25-09-1996 04-10-2001 (R)
Peru 25-09-1996 12-11-1997 (R)
Philippines 24-09-1996 23-02-2001 (R)
Poland 24-09-1996 25-05-1999 (R)
Portugal 24-09-1996 26-06-2000 (R)
Qatar 24-09-1996 03-03-1997 (R)
Republic of Korea, the 24-09-1996 24-09-1999 (R)
Republic of the Congo 11-02-1997 02-09-2014 (R)
Romania 24-09-1996 05-10-1999 (R)
Russian Federation 24-09-1996  (R)
Rwanda 30-11-2004 30-11-2004 (R)
Saint Kitts and Nevis 23-03-2004 27-04-2005 (R)
Saint Lucia 04-10-1996 05-04-2001 (R)
Saint Vincent and the Grenadines 02-07-2009 23-09-2009 (R)
Samoa 09-10-1996 27-09-2002 (R)
San Marino 07-10-1996 12-03-2002 (R)
São Tomé e Principe 26-09-1996 22-09-2022 (R)
Senegal 26-09-1996 09-06-1999 (R)
Serbia 08-06-2001 19-05-2004 (R)
Seychelles 24-09-1996 13-04-2004 (R)
Sierra Leone 08-09-2000 17-09-2001 (R)
Singapore 14-01-1999 10-11-2001 (R)
Slovakia 30-09-1996 03-03-1998 (R)
Slovenia 24-09-1996 31-08-1999 (R)
Solomon Islands 03-10-1996 20-01-2023 (R)
Somalia 08-09-2023
South Africa 24-09-1996 30-03-1999 (R)
Spain 24-09-1996 31-07-1998 (R)
Sri Lanka 24-10-1996 25-07-2023 (R)
Sudan 10-06-2004 10-06-2004 (R)
Suriname 14-01-1997 07-02-2006 (R)
Sweden 24-09-1996 02-12-1998 (R)
Switzerland 24-09-1996 01-10-1999 (R)
Tajikistan 07-10-1996 10-06-1998 (R)
Tanzania 30-09-2004 30-09-2004 (R)
Thailand 12-11-1996 25-09-2018 (R)
Timor-Leste 26-09-2008 01-08-2022 (R)
Togo 02-10-1996 02-07-2004 (R)
Trinidad and Tobago 08-10-2009 26-05-2010 (R)
Tunisia 16-10-1996 23-09-2004 (R)
Türkiye 24-09-1996 16-02-2000 (R)
Turkmenistan 24-09-1996 20-02-1998 (R)
Tuvalu 25-09-2018 31-03-2022 (R)
Uganda 07-11-1996 14-03-2001 (R)
Ukraine 27-09-1996 23-02-2001 (R)
United Arab Emirates 25-09-1996 18-09-2000 (R)
United Kingdom 24-09-1996 06-04-1998 (R)
United States of America 24-09-1996
Uruguay 24-09-1996 21-09-2001 (R)
Uzbekistan 03-10-1996 29-05-1997 (R)
Vanuatu 24-09-1996 16-09-2005 (R)
Venezuela 03-10-1996 13-05-2002 (R)
Vietnam 24-09-1996 10-03-2006 (R)
Yemen 30-09-1996
Zambia 03-12-1996 23-02-2006 (R)
Zimbabwe 13-10-1999 13-02-2019 (R)

Parties with reservations, declarations and objections

Party Reservations / Declarations Objections
China Yes No
Colombia Yes No
Germany Yes No
Guatemala Yes No
Holy See Yes No
Iran Yes No
Israel Yes No
Lebanon Yes No

China

24-09-1996

1. China has all along stood for the complete prohibition and thorough destruction of nuclear weapons and the realization of a nuclear-weapon-free world. It is in favor of a comprehensive ban on nuclear weapon test explosions in the process towards this objective. China is deeply convinced that the CTBT will facilitate nuclear disarmament and nuclear nonproliferation. Therefore, China supports the conclusion, through negotiation, of a fair, reasonable and verifiable treaty with universal adherence and unlimited duration and is ready to take active measures to promote its ratification and entry into force.
2. Meanwhile, the Chinese Government solemnly makes the following appeals:
(1) Major nuclear weapon states should abandon their policy of nuclear deterrence. States with huge nuclear arsenals should continue to drastically reduce their nuclear stockpiles.
(2) All countries that have deployed nuclear weapons on foreign soil should withdraw all of them to their own land. All nuclear weapon states should undertake not to be the first to use nuclear weapons at any time and under any circumstances, commit themselves unconditionally to the non-use or threat of use of nuclear weapons against non-nuclear weapon states or nuclear weapon-free zones, and conclude, at an early date, international legal instruments to this effect.
(3) All nuclear weapon states should pledge their support to proposals for the establishment of nuclear weapon-free zones, respect their status as such and undertake corresponding obligations.
(4) No country should develop or deploy space weapon systems or missile defence systems undermining strategic security and stability.
(5) An international convention on the complete prohibition and thorough destruction of nuclear weapons should be concluded through negotiations.
3. The Chinese Government endorses the application of verification measures consistent with the provisions of the CTBT to ensure its faithful implementation and at the same time it firmly opposes the abuse of verification rights by any country, including the use of espionage or human intelligence, to infringe upon the sovereignty of China and impair its legitimate security interests in violation of universally recognized principles of international law.
4 . In the present day world where huge nuclear arsenals and nuclear deterrence policy based on the first use of nuclear weapons still exist, the supreme national interests of China demand that it ensure the safety, reliability and effectiveness of its nuclear weapons before the goal of eliminating all nuclear weapons is achieved.
5. The Chinese Government and people are ready to continue to work together with governments and peoples of other countries for an early realization of the lofty goal of the complete prohibition and thorough destruction of nuclear weapons.

Colombia

29-01-2008

The Government of Colombia declares that the financial obligations arising from the present instrument shall not become payable until the Treaty has entered into force and shall not have retroactive effect.

Germany

24-09-1996

It is the understanding of the German Government that nothing in this Treaty shall ever be interpreted or applied in such a way as to prejudice or prevent research into and development of controlled thermonuclear fusion and its economic use.

Guatemala

12-01-2012

The Government of Guatemala declares that the financial obligations arising from the present Treaty will only become payable as from the date of entry into force of the Treaty and shall not have retroactive effect.

Holy See

24-09-1996

The Holy See is convinced that in the sphere of nuclear weapons, the banning of tests and of the further development of these weapons, disarmament and non-proliferation are closely linked and must be achieved as quickly as possible under effective international controls.
Furthermore, the Holy See understands that these are steps towards a general and total disarmament which the international community as a whole should accomplish without delay.


18-07-2001

The Holy See, in ratifying the Comprehensive Nuclear Test Ban Treaty (CTBT), adopted by the United Nations General Assembly on 10 September 1996 and signed by the Holy See on 24 September of the same year, wishes to repeat what was said when it added its signature: "The Holy See is convinced that in the sphere of nuclear weapons, the banning of tests and of the further development of these weapons, disarmament and non-proliferation are closely linked and must be achieved as quickly as possible under effective international controls".
In conformity with the nature and particular condition of Vatican City State, the Holy See, by this ratification, seeks to advance the genuine promotion of a culture of peace based upon the primacy of law and of respect for human life. At the beginning of the third millennium, the implementation of a system of comprehensive and complete disarmament, capable of fostering a climate of trust, cooperation and respect between all States, represents an indispensable aspect of the concrete realization of a culture of life and peace.
In lending moral support to the CTBT through this solemn act of ratification, the Holy See encourages the whole International Community, which is aware of the various challenges standing in the way of nuclear disarmament, to intensify its efforts to ensure the implementation of the said Treaty.

Iran

24-09-1996

1. The Islamic Republic of Iran considers that the Treaty does not meet nuclear disarmament criteria as originally intended. We had not perceived a CTBT only as non-proliferation instrument. The Treaty must have terminated fully and comprehensive further development of nuclear weapons. However, the Treaty bans explosions, thus limiting such development only in certain aspects, while leaving others avenues wide open. We see no other way for the CTBT to be meaningful, however, unless it is considered as a step towards a phased program for nuclear disarmament with specific time frames through negotiations on a consecutive series of subsequent treaties.
2. On National Technical Means, based on the deliberation that took place on the issues in the relevant Ad Hoc Committee of the Conference on Disarmament in Geneva, we interpret the text as according a complementary role to them and reiterate that they should be phased out with further development of the International Monitoring System. National Technical Means should not be interpreted to include information received from espionage and human intelligence.
3. The inclusion of Israel in the MESA grouping constitutes a politically-motivated aberration from UN practice and is thus objectionable. We express our strong reservation on the matter and believe that it will impede the implementation of the Treaty, as the confrontation of the States in this regional group would make it tremendously difficult for the Executive Council to form. The Conference of the States Parties would eventually be compelled to find a way to redress this problem.

Israel

29-01-1997

Israel considers that Iran's declaration on this matter has no legal basis and is entirely motivated by political reasons extraneous to the CTBT.
The Iranian declaration attempts to undermine the implementation of the treaty and is incompatible with both the Treaty and its spirit, as well as with the U.N. Charter principle of sovereign equality of all states.
Israel, by geography, is part of the Middle-East region, and no objection will change this.
Israel calls upon other signatories of the CTBT to express their rejection of the Iranian reservation to Israel's inclusion in the MESA Geographic region, as well as the threat contained therein.

Lebanon

03-10-2005

We express our reservation on the inclusion of Israel in MESA grouping, which constittutes an aberration from UN practice and it will impede the implementation of the treaty.
We believe strongly that the confrontation of the states in this regional group would make it tremendously difficult to form the Executive Council. The Conference of the States Parties would be compelled to find a way to redress this problem.

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