The list of parties to the Partial Test Ban Treaty encompasses the states who have signed and ratified or acceded to the international agreement prohibiting all test detonations of nuclear weapons except underground.

On August 5, 1963, the Partial Test Ban Treaty (PTBT) was opened for signature. The principal state authors (the Soviet Union, the United Kingdom, and the United States) signed the treaty that day. The PTBT came into force and closed for signature on October 10, 1963 with the ratification by the three principal states. Since then, states that did not sign the treaty can now only accede or succeed to it.
As of October 2018, 125 UN member states have ratified or acceded to the treaty, most recently Montenegro on 3 June 2006. In addition, the Republic of China (Taiwan), which is currently only recognized by 11 UN member states, ratified the treaty prior to the United Nations General Assembly's vote to transfer China's seat to the People's Republic of China (PRC) in 1971. A further 10 states have signed but not ratified the treaty. The instrument of ratification, accession, or succession is deposited at the respective capitals of the principal states of the treaty: Moscow, London, and Washington, D.C.
Ratified or acceded states
Multiple dates indicate the different days in which states submitted their signature or deposition, which varied by location. This location is noted by: (L) for London, (M) for Moscow, and (W) for Washington.
State | Signed | Deposited | Method |
---|---|---|---|
![]() | Aug 8, 1963 (L, M, W) | Mar 12, 1964 (L) Mar 13, 1964 (W) Mar 23, 1964 (M) | Ratification as ![]() |
![]() | Nov 16, 1988 (W) Dec 26, 1988 (M) Jan 26, 1989 (L) | Succession from ![]() | |
![]() | Aug 8, 1963 (W) Aug 9, 1963 (L, M) | Nov 14, 1986 (L) Nov 17, 1986 (M) Nov 21, 1986 (W) | Ratification |
![]() | Jun 7, 1994 (M, W) | Accession | |
![]() | Aug 8, 1963 (L, M, W) | Nov 12, 1963 (L, M, W) | Ratification |
![]() | Sep 11, 1963 (W) Sep 12, 1963 (L, M) | Jul 17, 1964 (L, M, W) | Ratification |
![]() | Aug 11, 1976 (L) Aug 13, 1976 (W) Aug 30, 1976 (M) | Succession from ![]() | |
![]() | Mar 11, 1985 (M) Mar 12, 1985 (W) Mar 13, 1985 (L) | Accession | |
![]() | Oct 8, 1963 (M) | Dec 16, 1963 (M) | Ratification as ![]() |
![]() | Aug 8, 1963 (L, M, W) | Mar 1, 1966 (L, M, W) | Ratification |
![]() | Aug 27, 1963 (W) Sep 3, 1963 (L) Oct 9, 1963 (M) | Dec 15, 1964 (W) Dec 23, 1964 (M) Apr 22, 1965 (L) | Ratification as ![]() |
![]() | Jun 8, 1978 (W) | Accession | |
![]() | Aug 8, 1963 (W) Aug 21, 1963 (L, M) | Aug 4, 1965 (M, W) Jan 25, 1966 (L) | Ratification |
![]() | Aug 15, 1994 (W) | Succession from ![]() | |
![]() | Jan 15, 1968 (M) Feb 14, 1968 (L) Mar 4, 1968 (W) | Succession from ![]() | |
![]() | Aug 8, 1963 (L, M, W) | Dec 15, 1964 (M) Jan 15, 1965 (W) Mar 4, 1965 (L) | Ratification |
![]() | Aug 8, 1963 (L, M, W) | Nov 13, 1963 (W) Nov 21, 1963 (M) Dec 2, 1963 (L) | Ratification as ![]() |
![]() | Aug 8, 1963 (L, M, W) | Jan 28, 1964 (L, M, W) | Ratification |
![]() | Oct 24, 1979 (M) | Accession | |
![]() | Dec 22, 1964 (W) Aug 24, 1965 (L) Sep 25, 1965 (M) | Accession | |
![]() | Aug 26, 1963 (W) | Mar 1, 1965 (W) | Ratification |
![]() | Aug 8, 1963 (W) Aug 9, 1963 (L, M) | Oct 6, 1965 (L) | Ratification |
![]() | Aug 16, 1963 (W) Aug 20, 1963 (L, M) | Oct 17, 1985 (L, W) | Ratification |
![]() | Aug 9, 1963 (L) Aug 13, 1963 (W) Aug 23, 1963 (M) | Jul 10, 1967 (W) | Ratification |
![]() | Sep 5, 1963 (W) | Feb 5, 1965 (W) | Ratification as the ![]() |
![]() | Jun 8, 1993 (W) | Succession from ![]() | |
![]() | Aug 8, 1963 (L, M, W) | Apr 15, 1965 (L) Apr 21, 1965 (M) May 7, 1965 (W) | Ratification |
![]() | Jan 1, 1993 (M, W) Apr 5, 1993 (L) | Succession from ![]() Signed Aug 8, 1963 Ratified Oct 17, 1963 | |
![]() | Aug 9, 1963 (L, W) Aug 12, 1963 (M) | Oct 28, 1965 (W) | Ratification |
![]() | Aug 9, 1963 (L, M, W) | Jan 15, 1964 (L, M, W) | Ratification |
![]() | Sep 16, 1963 (W) Sep 17, 1963 (L, M) | Jun 3, 1964 (M) Jun 18, 1964 (L) Jul 22, 1964 (W) | Ratification |
![]() | Sep 27, 1963 (W) Oct 1, 1963 (L, W) | May 6, 1964 (W) May 8, 1964 (L) Nov 13, 1964 (M) | Ratification |
![]() | Aug 8, 1963 (L, M, W) | Jan 10, 1964 (L, M, W) | Ratification as the ![]() |
![]() | Aug 21, 1963 (W) Aug 22, 1963 (L, M) | Dec 3, 1964 (W) Dec 7, 1964 (L) Feb 9, 1965 (M) | Ratification |
![]() | Jan 16, 1989 (M) | Accession | |
![]() | Jul 14, 1972 (M) Jul 18, 1972 (W) Aug 14, 1972 (L) | Succession from ![]() | |
![]() | Aug 8, 1963 (L, M, W) | Jan 9, 1964 (L, M, W) | Ratification |
![]() | Sep 10, 1963 (W) | Feb 20, 1964 (W) Mar 4, 1964 (L) Mar 9, 1964 (M) | Ratification |
![]() | Apr 27, 1965 (M, W) May 6, 1965 (L) | Succession from ![]() | |
![]() | Aug 19, 1963 (L, M, W) | Dec 1, 1964 (L, W) | Ratification as ![]() Also ![]() Signed Aug 8, 1963 Ratified Dec 30, 1963 |
![]() | Aug 9, 1963 (W) Sep 4, 1963 (L, M) | Nov 27, 1963 (L) Jan 9, 1964 (W) May 31, 1965 (M) | Ratification |
![]() | Aug 8, 1963 (W) Aug 9, 1963 (L, M) | Dec 18, 1963 (L, M, W) | Ratification as ![]() |
![]() | Sep 23, 1963 (W) | Jan 6, 1964 (W) | Ratification |
![]() | Aug 20, 1976 (M) | Accession | |
![]() | Aug 8, 1963 (W) Aug 15, 1963 (L, M) | Oct 2, 1964 (W) Dec 2, 1964 (L) | Ratification |
![]() | Aug 8, 1963 (L, M, W) | Oct 21, 1963 (L, M) Oct 22, 1963 (W) | Ratification as the ![]() |
![]() | Aug 12, 1963 (L, M, W) | Apr 29, 1964 (L, M, W) | Ratification |
![]() | Aug 8, 1963 (L, M, W) | Oct 10, 1963 (L) Oct 14, 1963 (M) Oct 18, 1963 (W) | Ratification |
![]() | Aug 23, 1963 (L, M, W) | Jan 20, 1964 (M) Jan 27, 1964 (W) May 8, 1964 (L) | Ratification |
![]() | Aug 8, 1963 (L, M, W) | May 5, 1964 (L, M, W) | Ratification as the ![]() |
![]() | Aug 13, 1963 (L, M, W) | Nov 30, 1964 (L) Dec 1, 1964 (W) Dec 3, 1964 (M) | Ratification |
![]() | Aug 8, 1963 (L, M, W) | Dec 18, 1963 (L, W) Dec 20, 1963 (M) | Ratification |
![]() | Aug 8, 1963 (L, M, W) | Jan 15, 1964 (L, W) Jan 28, 1964 (M) | Ratification |
![]() | Aug 8, 1963 (L, M, W) | Dec 10, 1964 (L, M, W) | Ratification |
![]() | Aug 13, 1963 (L, M, W) | Nov 11, 1991 (M) Nov 22, 1991 (W) | Ratification |
![]() | Aug 14, 1963 (L, M, W) | Jun 15, 1964 (L, M, W) | Ratification |
![]() | Aug 12, 1963 (L, M, W) | May 29, 1964 (L) Jul 7, 1964 (M) Jul 10, 1964 (W) | Ratification |
![]() | Jun 10, 1965 (L) Jun 11, 1965 (W) Jun 30, 1965 (M) | Accession | |
![]() | Aug 20, 1963 (L, M, W) | May 20, 1965 (W) May 21, 1965 (L) Jun 17, 1965 (M) | Ratification |
![]() | Aug 12, 1963 (L, M, W) | Feb 10, 1965 (L) Feb 12, 1965 (W) Apr 7, 1965 (M) | Ratification as the ![]() |
![]() | Aug 12, 1963 (W) Aug 13, 1963 (L, M) | May 14, 1965 (W) May 20, 1965 (L) Jun 4, 1965 (M) | Ratification |
![]() | Aug 8, 1963 (W) Aug 16, 1963 (L, M) | May 19, 1964 (W) May 22, 1964 (L) Jun 16, 1964 (M) | Ratification |
![]() | Aug 9, 1963 (L, M) Aug 16, 1963 (W) | Jul 15, 1968 (L) | Ratification as the ![]() |
![]() | Aug 13, 1963 (L) Sep 3, 1963 (W) Sep 13, 1963 (M) | Feb 10, 1965 (L, M, W) | Ratification |
![]() | Sep 23, 1963 (W) | Mar 15, 1965 (W) | Ratification |
![]() | Nov 26, 1964 (M) Nov 29, 1964 (W) Jan 7, 1965 (L) | Succession from ![]() | |
![]() | Aug 8, 1963 (W) Aug 12, 1963 (L) Aug 21, 1963 (M) | Jul 15, 1964 (M) Jul 16, 1964 (L, W) | Ratification |
![]() | Nov 25, 1964 (M, W) Dec 1, 1964 (L) | Succession from ![]() | |
![]() | Sep 13, 1963 (W) Sep 17, 1963 (L, M) | Apr 6, 1964 (W) Apr 15, 1964 (L) Apr 28, 1964 (M) | Ratification |
![]() | Apr 30, 1969 (M, W) May 12, 1969 (L) | Succession from ![]() | |
![]() | Aug 8, 1963 (L, M, W) | Dec 27, 1963 (L, M, W) | Ratification |
![]() | Aug 8, 1963 (L, M) | Nov 1, 1963 (M) Nov 7, 1963 (L) | Ratification as the ![]() |
![]() | Jun 3, 2006 (M) Dec 12, 2006 (L) | Succession from ![]() | |
![]() | Aug 27, 1963 (W) Aug 30, 1963 (L, M) | Feb 1, 1966 (L) Feb 18, 1966 (M) Feb 21, 1966 (W) | Ratification |
![]() | Aug 14, 1963 (L, M, W) | Nov 15, 1963 (L, M, W) | Ratification as ![]() |
![]() | Aug 26, 1963 (L, M) Aug 30, 1963 (W) | Oct 7, 1964 (L, M, W) | Ratification as the ![]() |
![]() | Aug 9, 1963 (L, M, W) | Sep 14, 1964 (L, M, W) | Ratification |
![]() | Aug 8, 1963 (L, M, W) | Oct 10, 1963 (L, W) Oct 16, 1963 (M) | Ratification |
![]() | Aug 13, 1963 (L, M, W) | Jan 26, 1965 (L) Feb 26, 1965 (M, W) | Ratification |
![]() | Sep 24, 1963 (L, M, W) | Jul 3, 1964 (M) Jul 6, 1964 (L) Jul 9, 1964 (W) | Ratification |
![]() | Sep 2, 1963 (L) Sep 4, 1963 (W) Sep 2, 1964 (M) | Feb 17, 1967 (L) Feb 25, 1967 (M) Feb 28, 1967 (W) | Ratification |
![]() | Aug 9, 1963 (L, M, W) | Nov 21, 1963 (L, M, W) | Ratification |
![]() | Aug 14, 1963 (L, M, W) | Mar 3, 1988 (L) | Ratification |
![]() | Sep 20, 1963 (W) | Feb 24, 1966 (W) | Ratification |
![]() | Oct 27, 1980 (L) Nov 13, 1980 (M) Mar 16, 1981 (W) | Succession from ![]() | |
![]() | Aug 23, 1963 (L, M, W) | Jul 20, 1964 (W) Aug 4, 1964 (L) Aug 21, 1964 (M) | Ratification |
![]() | Aug 8, 1963 (L, M, W) | Nov 10, 1965 (L) Nov 15, 1965 (W) Feb 8, 1966 (M) | Ratification |
![]() | Aug 8, 1963 (L, M, W) | Oct 14, 1963 (L, M, W) | Ratification as ![]() |
![]() | Aug 8, 1963 (L, M, W) | Dec 12, 1963 (L, M, W) | Ratification as ![]() |
![]() | Aug 5, 1963 (L, M, W) | Oct 10, 1963 (L, M, W) | Ratification as ![]() |
![]() | Sep 19, 1963 (W) | Oct 22, 1963 (L) Dec 16, 1963 (M) Dec 27, 1963 (W) | Ratification |
![]() | Sep 5, 1963 (L, M) Sep 6, 1963 (W) | Jan 15, 1965 (W) Jan 19, 1965 (L) Feb 8, 1965 (M) | Ratification as ![]() |
![]() | Sep 17, 1963 (W) Sep 20, 1963 (L, M) | Jul 3, 1964 (L) Jul 9, 1964 (W) Nov 27, 1964 (M) | Ratification |
![]() | Sep 20, 1963 (W) Sep 23, 1963 (L, M) | May 6, 1964 (L) May 12, 1964 (M) Jun 2, 1964 (W) | Ratification |
![]() | Aug 8, 1963 (M) | Jan 31, 1964 (M) | Ratification as ![]() Succession as ![]() ![]() Succession as ![]() |
![]() | Mar 12, 1985 (L) Mar 14, 1985 (M) Apr 8, 1985 (W) | Accession | |
![]() | Sep 4, 1963 (L, M) Sep 11, 1963 (W) | Feb 21, 1964 (L) Mar 4, 1964 (W) Apr 29, 1964 (M) | Ratification |
![]() | Jul 12, 1968 (M, W) Jul 23, 1968 (L) | Succession from ![]() | |
![]() | Jan 1, 1993 (M, W) May 17, 1993 (L) | Succession from ![]() Signed Aug 8, 1963 Ratified Oct 14, 1963 | |
![]() | Apr 7, 1992 (L) Aug 20, 1992 (W) | Succession from ![]() | |
![]() | Oct 10, 1963 (L, W) Nov 22, 1963 (M) | Accession | |
![]() | Aug 30, 1963 (L, W) | Jul 24, 1964 (L, W) | Ratification |
![]() | Aug 13, 1963 (W) Aug 14, 1963 (L) | Dec 17, 1964 (L, W) | Ratification as ![]() |
![]() | Aug 22, 1963 (L, W) Aug 23, 1963 (M) | Feb 5, 1964 (W) Feb 12, 1964 (M) Feb 13, 1964 (L) | Ratification as ![]() |
![]() | Aug 9, 1963 (L, M, W) | Mar 4, 1966 (L, W) Mar 28, 1966 (M) | Ratification |
![]() | Jan 6, 1993 (L) Apr 9, 1993 (W) | Accession | |
![]() | May 29, 1969 (L, W) Jun 3, 1969 (M) | Accession | |
![]() | Aug 12, 1963 (L, M, W) | Dec 9, 1963 (L, M, W) | Ratification |
![]() | Aug 26, 1963 (L, M, W) | Jan 16, 1964 (L, M, W) | Ratification |
![]() | Aug 13, 1963 (L, M, W) | Jun 1, 1964 (L, M, W) | Ratification |
![]() | Sep 16, 1963 (L) Sep 18, 1963 (W) Sep 20, 1963 (M) | Feb 6, 1964 (L) | Ratification |
![]() | Aug 8, 1963 (L, M, W) | Nov 15, 1963 (L) Nov 21, 1963 (M) Nov 29, 1963 (W) | Ratification |
![]() | Sep 18, 1963 (W) | Dec 7, 1964 (W) | Ratification |
![]() | Jun 22, 1971 (M) Jul 7, 1971 (L, W) | Succession from ![]() | |
![]() | Aug 12, 1963 (L, M, W) | Jul 14, 1964 (W) Jul 16, 1964 (L) Aug 6, 1964 (M) | Ratification |
![]() | Aug 8, 1963 (W) Aug 12, 1963 (L, M) | May 26, 1965 (L, M) Jun 3, 1965 (W) | Ratification |
![]() | Aug 9, 1963 (L, M, W) | Jul 8, 1965 (L, M, W) | Ratification |
![]() | Aug 29, 1963 (L, W) | Mar 24, 1964 (L) Apr 2, 1964 (W) | Ratification |
![]() | Oct 8, 1963 (M) | Dec 30, 1963 (M) | Ratification as ![]() |
![]() | Aug 5, 1963 (L, M, W) | Oct 10, 1963 (L, M, W) | Ratification |
![]() | Aug 5, 1963 (L, M, W) | Oct 10, 1963 (L, M, W) | Ratification |
![]() | Aug 12, 1963 (W) Sep 27, 1963 (L, M) | Feb 25, 1969 (L) | Ratification |
![]() | Aug 16, 1963 (W) Aug 20, 1963 (L, M) | Feb 22, 1965 (M) Mar 3, 1965 (L) Mar 29, 1965 (W) | Ratification |
![]() | Jun 1, 1979 (M) | Accession as ![]() Also signed by ![]() | |
![]() | Jan 11, 1965 (M, W) Feb 8, 1965 (L) | Succession from ![]() |
- Notes
- Montenegro's effective date of succession was 3 June 2006.
Partially recognized state abiding by treaty
The Republic of China (Taiwan), which is currently only recognized by 11 UN member states, ratified the treaty prior to the United Nations General Assembly's vote to transfer China's seat to the People's Republic of China (PRC) in 1971. The ROC has committed itself to continue to adhere to the requirements of the treaty, and the United States has declared that they still consider them to be "bound by its obligations".
State | Signed | Deposited | Method |
---|---|---|---|
![]() | Aug 23, 1963 (M) | May 18, 1964 (M) | Ratification |
Signatory states
The following ten states have signed but not ratified the treaty.
State | Signed |
---|---|
![]() | Aug 14, 1963 (L, M, W) |
![]() | Aug 30, 1963 (W) |
![]() | Oct 4, 1963 (W) |
![]() | Aug 27, 1963 (W) Sep 6, 1963 (L) |
![]() | Aug 9, 1963 (L, M, W) |
![]() | Oct 9, 1963 (W) |
![]() | Aug 23, 1963 (L, M, W) |
![]() | Aug 15, 1963 (L, M, W) |
![]() | Oct 9, 1963 (L, W) |
![]() | Aug 19, 1963 (M, W) |
Non-signatory states
The remaining UN member states and UN observer states, which have not signed the treaty, are:
Albania
Andorra
Angola
Azerbaijan
Bahrain
Barbados
Belize
Brunei
Cambodia
P.R. China
Comoros
Congo
Cuba
Djibouti
Dominica
Eritrea
Estonia
France
Georgia
Grenada
Guinea
Guyana
Kazakhstan
Kiribati
Kyrgyzstan
Latvia
Lesotho
Liechtenstein
Lithuania
Maldives
Marshall Islands
Micronesia
Moldova
Monaco
Mozambique
Namibia
Nauru
North Korea
North Macedonia
Oman
Palau
Palestine
Qatar
St. Kitts/Nevis
Saint Lucia
St. Vincent
São Tomé/Príncipe
Saudi Arabia
Solomon Islands
South Sudan
Tajikistan
Timor-Leste
Turkmenistan
Tuvalu
United Arab Emirates
Uzbekistan
Vanuatu
Vatican City
Vietnam
Zimbabwe
- Signed by the Republic of Vietnam on 1 October 1963, but following the victory by the Democratic Republic of Vietnam in the Vietnam War, the reunified Socialist Republic of Vietnam renounced all treaty actions performed by the Republic of Vietnam.
See also
- List of parties to the Biological Weapons Convention
- List of parties to the Chemical Weapons Convention
- List of parties to the Convention on Certain Conventional Weapons
- List of parties to the Comprehensive Nuclear-Test-Ban Treaty
- List of parties to the Ottawa Treaty
- List of parties to the Treaty on the Non-Proliferation of Nuclear Weapons
- List of parties to the Treaty on the Prohibition of Nuclear Weapons
References
- "Treaty Banning Nuclear Weapon Tests in the Atmosphere, in Outer Space and Under Water". United Nations Office for Disarmament Affairs. Retrieved 2013-02-24.
- "China: Ratification of Partial Test Ban Treaty". United Nations Office for Disarmament Affairs. Archived from the original on 2015-05-08. Retrieved 2015-02-14.
- "Treaty Banning Nuclear Weapon Tests in the Atmosphere, in Outer Space and Under Water". Foreign and Commonwealth Office. Archived from the original on 2013-01-04. Retrieved 2013-07-23.
"Treaty Banning Nuclear Weapon Tests in the Atmosphere, in Outer Space and Under Water [London version]". Foreign and Commonwealth Office. Retrieved 2019-04-27. - "Treaty Banning Nuclear Weapon Tests in the Atmosphere, in Outer Space and Under Water". United States Department of State. 2010-10-06. Retrieved 2019-07-01.
- Договор о запрещении испытаний ядерного оружия в атмосфере, в космическом пространстве и под водой (in Russian). Ministry of Foreign Affairs of Russia. Retrieved 2015-04-04.
- "Montenegro: Succession to Partial Test Ban Treaty". United Nations Office for Disarmament Affairs. Retrieved 2016-08-10.
External links
- Limited Test Ban Treaty at the U.S. Department of State
Author: www.NiNa.Az
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The list of parties to the Partial Test Ban Treaty encompasses the states who have signed and ratified or acceded to the international agreement prohibiting all test detonations of nuclear weapons except underground Participation in the Partial Test Ban Treaty Signed and ratified Acceded or succeeded Only signed Non signatory On August 5 1963 the Partial Test Ban Treaty PTBT was opened for signature The principal state authors the Soviet Union the United Kingdom and the United States signed the treaty that day The PTBT came into force and closed for signature on October 10 1963 with the ratification by the three principal states Since then states that did not sign the treaty can now only accede or succeed to it As of October 2018 125 UN member states have ratified or acceded to the treaty most recently Montenegro on 3 June 2006 In addition the Republic of China Taiwan which is currently only recognized by 11 UN member states ratified the treaty prior to the United Nations General Assembly s vote to transfer China s seat to the People s Republic of China PRC in 1971 A further 10 states have signed but not ratified the treaty The instrument of ratification accession or succession is deposited at the respective capitals of the principal states of the treaty Moscow London and Washington D C Ratified or acceded statesMultiple dates indicate the different days in which states submitted their signature or deposition which varied by location This location is noted by L for London M for Moscow and W for Washington State Signed Deposited Method Afghanistan Aug 8 1963 L M W Mar 12 1964 L Mar 13 1964 W Mar 23 1964 M Ratification as Kingdom of Afghanistan Antigua and Barbuda Nov 16 1988 W Dec 26 1988 M Jan 26 1989 L Succession from United Kingdom Argentina Aug 8 1963 W Aug 9 1963 L M Nov 14 1986 L Nov 17 1986 M Nov 21 1986 W Ratification Armenia Jun 7 1994 M W Accession Australia Aug 8 1963 L M W Nov 12 1963 L M W Ratification Austria Sep 11 1963 W Sep 12 1963 L M Jul 17 1964 L M W Ratification Bahamas Aug 11 1976 L Aug 13 1976 W Aug 30 1976 M Succession from United Kingdom Bangladesh Mar 11 1985 M Mar 12 1985 W Mar 13 1985 L Accession Belarus Oct 8 1963 M Dec 16 1963 M Ratification as Byelorussian SSR Belgium Aug 8 1963 L M W Mar 1 1966 L M W Ratification Benin Aug 27 1963 W Sep 3 1963 L Oct 9 1963 M Dec 15 1964 W Dec 23 1964 M Apr 22 1965 L Ratification as Republic of Dahomey Bhutan Jun 8 1978 W Accession Bolivia Aug 8 1963 W Aug 21 1963 L M Aug 4 1965 M W Jan 25 1966 L Ratification Bosnia and Herzegovina Aug 15 1994 W Succession from SFR Yugoslavia Botswana Jan 15 1968 M Feb 14 1968 L Mar 4 1968 W Succession from United Kingdom Brazil Aug 8 1963 L M W Dec 15 1964 M Jan 15 1965 W Mar 4 1965 L Ratification Bulgaria Aug 8 1963 L M W Nov 13 1963 W Nov 21 1963 M Dec 2 1963 L Ratification as People s Republic of Bulgaria Canada Aug 8 1963 L M W Jan 28 1964 L M W Ratification Cape Verde Oct 24 1979 M Accession Central African Republic Dec 22 1964 W Aug 24 1965 L Sep 25 1965 M Accession Chad Aug 26 1963 W Mar 1 1965 W Ratification Chile Aug 8 1963 W Aug 9 1963 L M Oct 6 1965 L Ratification Colombia Aug 16 1963 W Aug 20 1963 L M Oct 17 1985 L W Ratification Costa Rica Aug 9 1963 L Aug 13 1963 W Aug 23 1963 M Jul 10 1967 W Ratification Cote d Ivoire Sep 5 1963 W Feb 5 1965 W Ratification as the Republic of Ivory Coast Croatia Jun 8 1993 W Succession from SFR Yugoslavia Cyprus Aug 8 1963 L M W Apr 15 1965 L Apr 21 1965 M May 7 1965 W Ratification Czech Republic Jan 1 1993 M W Apr 5 1993 L Succession from Czechoslovakia Signed Aug 8 1963 Ratified Oct 17 1963 Democratic Republic of the Congo Aug 9 1963 L W Aug 12 1963 M Oct 28 1965 W Ratification Denmark Aug 9 1963 L M W Jan 15 1964 L M W Ratification Dominican Republic Sep 16 1963 W Sep 17 1963 L M Jun 3 1964 M Jun 18 1964 L Jul 22 1964 W Ratification Ecuador Sep 27 1963 W Oct 1 1963 L W May 6 1964 W May 8 1964 L Nov 13 1964 M Ratification Egypt Aug 8 1963 L M W Jan 10 1964 L M W Ratification as the United Arab Republic El Salvador Aug 21 1963 W Aug 22 1963 L M Dec 3 1964 W Dec 7 1964 L Feb 9 1965 M Ratification Equatorial Guinea Jan 16 1989 M Accession Fiji Jul 14 1972 M Jul 18 1972 W Aug 14 1972 L Succession from United Kingdom Finland Aug 8 1963 L M W Jan 9 1964 L M W Ratification Gabon Sep 10 1963 W Feb 20 1964 W Mar 4 1964 L Mar 9 1964 M Ratification Gambia Apr 27 1965 M W May 6 1965 L Succession from United Kingdom Germany Aug 19 1963 L M W Dec 1 1964 L W Ratification as West Germany Also East Germany Signed Aug 8 1963 Ratified Dec 30 1963 Ghana Aug 9 1963 W Sep 4 1963 L M Nov 27 1963 L Jan 9 1964 W May 31 1965 M Ratification Greece Aug 8 1963 W Aug 9 1963 L M Dec 18 1963 L M W Ratification as Kingdom of Greece Guatemala Sep 23 1963 W Jan 6 1964 W Ratification Guinea Bissau Aug 20 1976 M Accession Honduras Aug 8 1963 W Aug 15 1963 L M Oct 2 1964 W Dec 2 1964 L Ratification Hungary Aug 8 1963 L M W Oct 21 1963 L M Oct 22 1963 W Ratification as the People s Republic of Hungary Iceland Aug 12 1963 L M W Apr 29 1964 L M W Ratification India Aug 8 1963 L M W Oct 10 1963 L Oct 14 1963 M Oct 18 1963 W Ratification Indonesia Aug 23 1963 L M W Jan 20 1964 M Jan 27 1964 W May 8 1964 L Ratification Iran Aug 8 1963 L M W May 5 1964 L M W Ratification as the Empire of Iran Iraq Aug 13 1963 L M W Nov 30 1964 L Dec 1 1964 W Dec 3 1964 M Ratification Ireland Aug 8 1963 L M W Dec 18 1963 L W Dec 20 1963 M Ratification Israel Aug 8 1963 L M W Jan 15 1964 L W Jan 28 1964 M Ratification Italy Aug 8 1963 L M W Dec 10 1964 L M W Ratification Jamaica Aug 13 1963 L M W Nov 11 1991 M Nov 22 1991 W Ratification Japan Aug 14 1963 L M W Jun 15 1964 L M W Ratification Jordan Aug 12 1963 L M W May 29 1964 L Jul 7 1964 M Jul 10 1964 W Ratification Kenya Jun 10 1965 L Jun 11 1965 W Jun 30 1965 M Accession Kuwait Aug 20 1963 L M W May 20 1965 W May 21 1965 L Jun 17 1965 M Ratification Laos Aug 12 1963 L M W Feb 10 1965 L Feb 12 1965 W Apr 7 1965 M Ratification as the Kingdom of Laos Lebanon Aug 12 1963 W Aug 13 1963 L M May 14 1965 W May 20 1965 L Jun 4 1965 M Ratification Liberia Aug 8 1963 W Aug 16 1963 L M May 19 1964 W May 22 1964 L Jun 16 1964 M Ratification Libya Aug 9 1963 L M Aug 16 1963 W Jul 15 1968 L Ratification as the Kingdom of Libya Luxembourg Aug 13 1963 L Sep 3 1963 W Sep 13 1963 M Feb 10 1965 L M W Ratification Madagascar Sep 23 1963 W Mar 15 1965 W Ratification Malawi Nov 26 1964 M Nov 29 1964 W Jan 7 1965 L Succession from United Kingdom Malaysia Aug 8 1963 W Aug 12 1963 L Aug 21 1963 M Jul 15 1964 M Jul 16 1964 L W Ratification Malta Nov 25 1964 M W Dec 1 1964 L Succession from United Kingdom Mauritania Sep 13 1963 W Sep 17 1963 L M Apr 6 1964 W Apr 15 1964 L Apr 28 1964 M Ratification Mauritius Apr 30 1969 M W May 12 1969 L Succession from United Kingdom Mexico Aug 8 1963 L M W Dec 27 1963 L M W Ratification Mongolia Aug 8 1963 L M Nov 1 1963 M Nov 7 1963 L Ratification as the Mongolian People s Republic Montenegro Jun 3 2006 M Dec 12 2006 L Succession from Serbia and Montenegro Morocco Aug 27 1963 W Aug 30 1963 L M Feb 1 1966 L Feb 18 1966 M Feb 21 1966 W Ratification Myanmar Aug 14 1963 L M W Nov 15 1963 L M W Ratification as Union of Burma Nepal Aug 26 1963 L M Aug 30 1963 W Oct 7 1964 L M W Ratification as the Kingdom of Nepal Netherlands Aug 9 1963 L M W Sep 14 1964 L M W Ratification New Zealand Aug 8 1963 L M W Oct 10 1963 L W Oct 16 1963 M Ratification Nicaragua Aug 13 1963 L M W Jan 26 1965 L Feb 26 1965 M W Ratification Niger Sep 24 1963 L M W Jul 3 1964 M Jul 6 1964 L Jul 9 1964 W Ratification Nigeria Sep 2 1963 L Sep 4 1963 W Sep 2 1964 M Feb 17 1967 L Feb 25 1967 M Feb 28 1967 W Ratification Norway Aug 9 1963 L M W Nov 21 1963 L M W Ratification Pakistan Aug 14 1963 L M W Mar 3 1988 L Ratification Panama Sep 20 1963 W Feb 24 1966 W Ratification Papua New Guinea Oct 27 1980 L Nov 13 1980 M Mar 16 1981 W Succession from Australia Peru Aug 23 1963 L M W Jul 20 1964 W Aug 4 1964 L Aug 21 1964 M Ratification Philippines Aug 8 1963 L M W Nov 10 1965 L Nov 15 1965 W Feb 8 1966 M Ratification Poland Aug 8 1963 L M W Oct 14 1963 L M W Ratification as People s Republic of Poland Romania Aug 8 1963 L M W Dec 12 1963 L M W Ratification as People s Republic of Romania Russia Aug 5 1963 L M W Oct 10 1963 L M W Ratification as Soviet Union Rwanda Sep 19 1963 W Oct 22 1963 L Dec 16 1963 M Dec 27 1963 W Ratification Samoa Sep 5 1963 L M Sep 6 1963 W Jan 15 1965 W Jan 19 1965 L Feb 8 1965 M Ratification as Western Samoa San Marino Sep 17 1963 W Sep 20 1963 L M Jul 3 1964 L Jul 9 1964 W Nov 27 1964 M Ratification Senegal Sep 20 1963 W Sep 23 1963 L M May 6 1964 L May 12 1964 M Jun 2 1964 W Ratification Serbia Aug 8 1963 M Jan 31 1964 M Ratification as SFR Yugoslavia Succession as FR Yugoslavia later known as Serbia and Montenegro Succession as Serbia on Jun 3 2006 Seychelles Mar 12 1985 L Mar 14 1985 M Apr 8 1985 W Accession Sierra Leone Sep 4 1963 L M Sep 11 1963 W Feb 21 1964 L Mar 4 1964 W Apr 29 1964 M Ratification Singapore Jul 12 1968 M W Jul 23 1968 L Succession from Malaysia Slovakia Jan 1 1993 M W May 17 1993 L Succession from Czechoslovakia Signed Aug 8 1963 Ratified Oct 14 1963 Slovenia Apr 7 1992 L Aug 20 1992 W Succession from SFR Yugoslavia South Africa Oct 10 1963 L W Nov 22 1963 M Accession South Korea Aug 30 1963 L W Jul 24 1964 L W Ratification Spain Aug 13 1963 W Aug 14 1963 L Dec 17 1964 L W Ratification as Spanish State Sri Lanka Aug 22 1963 L W Aug 23 1963 M Feb 5 1964 W Feb 12 1964 M Feb 13 1964 L Ratification as Dominion of Ceylon Sudan Aug 9 1963 L M W Mar 4 1966 L W Mar 28 1966 M Ratification Suriname Jan 6 1993 L Apr 9 1993 W Accession Swaziland May 29 1969 L W Jun 3 1969 M Accession Sweden Aug 12 1963 L M W Dec 9 1963 L M W Ratification Switzerland Aug 26 1963 L M W Jan 16 1964 L M W Ratification Syria Aug 13 1963 L M W Jun 1 1964 L M W Ratification Tanzania Sep 16 1963 L Sep 18 1963 W Sep 20 1963 M Feb 6 1964 L Ratification Thailand Aug 8 1963 L M W Nov 15 1963 L Nov 21 1963 M Nov 29 1963 W Ratification Togo Sep 18 1963 W Dec 7 1964 W Ratification Tonga Jun 22 1971 M Jul 7 1971 L W Succession from United Kingdom Trinidad and Tobago Aug 12 1963 L M W Jul 14 1964 W Jul 16 1964 L Aug 6 1964 M Ratification Tunisia Aug 8 1963 W Aug 12 1963 L M May 26 1965 L M Jun 3 1965 W Ratification Turkey Aug 9 1963 L M W Jul 8 1965 L M W Ratification Uganda Aug 29 1963 L W Mar 24 1964 L Apr 2 1964 W Ratification Ukraine Oct 8 1963 M Dec 30 1963 M Ratification as Ukrainian SSR United Kingdom Aug 5 1963 L M W Oct 10 1963 L M W Ratification United States Aug 5 1963 L M W Oct 10 1963 L M W Ratification Uruguay Aug 12 1963 W Sep 27 1963 L M Feb 25 1969 L Ratification Venezuela Aug 16 1963 W Aug 20 1963 L M Feb 22 1965 M Mar 3 1965 L Mar 29 1965 W Ratification Yemen Jun 1 1979 M Accession as South Yemen Also signed by North Yemen on Sep 6 1963 prior to Yemeni unification Zambia Jan 11 1965 M W Feb 8 1965 L Succession from United Kingdom Notes Montenegro s effective date of succession was 3 June 2006 Partially recognized state abiding by treatyThe Republic of China Taiwan which is currently only recognized by 11 UN member states ratified the treaty prior to the United Nations General Assembly s vote to transfer China s seat to the People s Republic of China PRC in 1971 The ROC has committed itself to continue to adhere to the requirements of the treaty and the United States has declared that they still consider them to be bound by its obligations State Signed Deposited Method Republic of China Aug 23 1963 M May 18 1964 M RatificationSignatory statesThe following ten states have signed but not ratified the treaty State Signed Algeria Aug 14 1963 L M W Burkina Faso Aug 30 1963 W Burundi Oct 4 1963 W Cameroon Aug 27 1963 W Sep 6 1963 L Ethiopia Aug 9 1963 L M W Haiti Oct 9 1963 W Mali Aug 23 1963 L M W Paraguay Aug 15 1963 L M W Portugal Oct 9 1963 L W Somalia Aug 19 1963 M W Non signatory statesThe remaining UN member states and UN observer states which have not signed the treaty are Albania Andorra Angola Azerbaijan Bahrain Barbados Belize Brunei Cambodia P R China Comoros Congo Cuba Djibouti Dominica Eritrea Estonia France Georgia Grenada Guinea Guyana Kazakhstan Kiribati Kyrgyzstan Latvia Lesotho Liechtenstein Lithuania Maldives Marshall Islands Micronesia Moldova Monaco Mozambique Namibia Nauru North Korea North Macedonia Oman Palau Palestine Qatar St Kitts Nevis Saint Lucia St Vincent Sao Tome Principe Saudi Arabia Solomon Islands South Sudan Tajikistan Timor Leste Turkmenistan Tuvalu United Arab Emirates Uzbekistan Vanuatu Vatican City Vietnam ZimbabweSigned by the Republic of Vietnam on 1 October 1963 but following the victory by the Democratic Republic of Vietnam in the Vietnam War the reunified Socialist Republic of Vietnam renounced all treaty actions performed by the Republic of Vietnam See alsoList of parties to the Biological Weapons Convention List of parties to the Chemical Weapons Convention List of parties to the Convention on Certain Conventional Weapons List of parties to the Comprehensive Nuclear Test Ban Treaty List of parties to the Ottawa Treaty List of parties to the Treaty on the Non Proliferation of Nuclear Weapons List of parties to the Treaty on the Prohibition of Nuclear WeaponsReferences Treaty Banning Nuclear Weapon Tests in the Atmosphere in Outer Space and Under Water United Nations Office for Disarmament Affairs Retrieved 2013 02 24 China Ratification of Partial Test Ban Treaty United Nations Office for Disarmament Affairs Archived from the original on 2015 05 08 Retrieved 2015 02 14 Treaty Banning Nuclear Weapon Tests in the Atmosphere in Outer Space and Under Water Foreign and Commonwealth Office Archived from the original on 2013 01 04 Retrieved 2013 07 23 Treaty Banning Nuclear Weapon Tests in the Atmosphere in Outer Space and Under Water London version Foreign and Commonwealth Office Retrieved 2019 04 27 Treaty Banning Nuclear Weapon Tests in the Atmosphere in Outer Space and Under Water United States Department of State 2010 10 06 Retrieved 2019 07 01 Dogovor o zapreshenii ispytanij yadernogo oruzhiya v atmosfere v kosmicheskom prostranstve i pod vodoj in Russian Ministry of Foreign Affairs of Russia Retrieved 2015 04 04 Montenegro Succession to Partial Test Ban Treaty United Nations Office for Disarmament Affairs Retrieved 2016 08 10 External linksLimited Test Ban Treaty at the U S Department of State