List of parties to the Partial Nuclear Test Ban Treaty

Participation in the Partial Test Ban Treaty

Signed and ratified

Acceded or succeeded

Only signed

Non-signatory

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 February 2013, 125 UN member states have ratified or acceded to the treaty, most recently Montenegro on 3 June 2006.^[1] In addition, the Republic of China (Taiwan), which is currently only recognized by 21 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.^[2] 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^[1]^[3]^[4]^[5]	Signed	Deposited	Method
Afghanistan	000000001963-08-08-0000Aug 8, 1963 (L, M, W)	000000001964-03-12-0000Mar 12, 1964 (L) 000000001964-03-13-0000Mar 13, 1964 (W) 000000001964-03-23-0000Mar 23, 1964 (M)	Ratification as Kingdom of Afghanistan
Antigua and Barbuda		000000001988-11-16-0000Nov 16, 1988 (W) 000000001988-12-26-0000Dec 26, 1988 (M) 000000001989-01-26-0000Jan 26, 1989 (L)	Succession from United Kingdom
Argentina	000000001963-08-08-0000Aug 8, 1963 (W) 000000001963-08-09-0000Aug 9, 1963 (L, M)	000000001986-11-14-0000Nov 14, 1986 (L) 000000001986-11-17-0000Nov 17, 1986 (M) 000000001986-11-21-0000Nov 21, 1986 (W)	Ratification
Armenia		000000001994-06-07-0000Jun 7, 1994 (M, W)	Accession
Australia	000000001963-08-08-0000Aug 8, 1963 (L, M, W)	000000001963-11-12-0000Nov 12, 1963 (L, M, W)	Ratification
Austria	000000001963-09-11-0000Sep 11, 1963 (W) 000000001963-09-12-0000Sep 12, 1963 (L, M)	000000001964-07-17-0000Jul 17, 1964 (L, M, W)	Ratification
Bahamas		000000001976-08-11-0000Aug 11, 1976 (L) 000000001976-08-13-0000Aug 13, 1976 (W) 000000001976-08-30-0000Aug 30, 1976 (M)	Succession from United Kingdom
Bangladesh		000000001985-03-11-0000Mar 11, 1985 (M) 000000001985-03-12-0000Mar 12, 1985 (W) 000000001985-03-13-0000Mar 13, 1985 (L)	Accession
Belarus	000000001963-10-08-0000Oct 8, 1963 (M)	000000001963-12-16-0000Dec 16, 1963 (M)	Ratification as Byelorussian SSR
Belgium	000000001963-08-08-0000Aug 8, 1963 (L, M, W)	000000001966-03-01-0000Mar 1, 1966 (L, M, W)	Ratification
Benin	000000001963-08-27-0000Aug 27, 1963 (W) 000000001963-09-03-0000Sep 3, 1963 (L) 000000001963-10-09-0000Oct 9, 1963 (M)	000000001964-12-15-0000Dec 15, 1964 (W) 000000001964-12-23-0000Dec 23, 1964 (M) 000000001965-04-22-0000Apr 22, 1965 (L)	Ratification as Republic of Dahomey
Bhutan		000000001978-06-08-0000Jun 8, 1978 (W)	Accession
Bolivia	000000001963-08-08-0000Aug 8, 1963 (W) 000000001963-08-21-0000Aug 21, 1963 (L, M)	000000001965-08-04-0000Aug 4, 1965 (M, W) 000000001966-01-25-0000Jan 25, 1966 (L)	Ratification
Bosnia and Herzegovina		000000001994-08-15-0000Aug 15, 1994 (W)	Succession from SFR Yugoslavia
Botswana		000000001968-01-15-0000Jan 15, 1968 (M) 000000001968-02-14-0000Feb 14, 1968 (L) 000000001968-03-04-0000Mar 4, 1968 (W)	Succession from United Kingdom
Brazil	000000001963-08-08-0000Aug 8, 1963 (L, M, W)	000000001964-12-15-0000Dec 15, 1964 (M) 000000001965-01-15-0000Jan 15, 1965 (W) 000000001965-03-04-0000Mar 4, 1965 (L)	Ratification
Bulgaria	000000001963-08-08-0000Aug 8, 1963 (L, M, W)	000000001963-11-13-0000Nov 13, 1963 (W) 000000001963-11-21-0000Nov 21, 1963 (M) 000000001963-12-02-0000Dec 2, 1963 (L)	Ratification as People's Republic of Bulgaria
Canada	000000001963-08-08-0000Aug 8, 1963 (L, M, W)	000000001964-01-28-0000Jan 28, 1964 (L, M, W)	Ratification
Cape Verde		000000001979-10-24-0000Oct 24, 1979 (M)	Accession
Central African Republic		000000001964-12-22-0000Dec 22, 1964 (W) 000000001965-08-24-0000Aug 24, 1965 (L) 000000001965-09-25-0000Sep 25, 1965 (M)	Accession
Chad	000000001963-08-26-0000Aug 26, 1963 (W)	000000001965-03-01-0000Mar 1, 1965 (W)	Ratification
Chile	000000001963-08-08-0000Aug 8, 1963 (W) 000000001963-08-09-0000Aug 9, 1963 (L, M)	000000001965-10-06-0000Oct 6, 1965 (L)	Ratification
Colombia	000000001963-08-16-0000Aug 16, 1963 (W) 000000001963-08-20-0000Aug 20, 1963 (L, M)	000000001985-10-17-0000Oct 17, 1985 (L, W)	Ratification
Costa Rica	000000001963-08-09-0000Aug 9, 1963 (L) 000000001963-08-13-0000Aug 13, 1963 (W) 000000001963-08-23-0000Aug 23, 1963 (M)	000000001967-07-10-0000Jul 10, 1967 (W)	Ratification
Côte d'Ivoire	000000001963-09-05-0000Sep 5, 1963 (W)	000000001965-02-05-0000Feb 5, 1965 (W)	Ratification as the Republic of Ivory Coast
Croatia		000000001993-06-08-0000Jun 8, 1993 (W)	Succession from SFR Yugoslavia
Cyprus	000000001963-08-08-0000Aug 8, 1963 (L, M, W)	000000001965-04-15-0000Apr 15, 1965 (L) 000000001965-04-21-0000Apr 21, 1965 (M) 000000001965-05-07-0000May 7, 1965 (W)	Ratification
Czech Republic		000000001993-01-01-0000Jan 1, 1993 (M, W) 000000001993-04-05-0000Apr 5, 1993 (L)	Succession from Czechoslovakia Signed 000000001963-08-08-0000Aug 8, 1963 Ratified 000000001963-10-17-0000Oct 17, 1963
Democratic Republic of the Congo	000000001963-08-09-0000Aug 9, 1963 (L, W) 000000001963-08-12-0000Aug 12, 1963 (M)	000000001965-10-28-0000Oct 28, 1965 (W)	Ratification
Denmark	000000001963-08-09-0000Aug 9, 1963 (L, M, W)	000000001964-01-15-0000Jan 15, 1964 (L, M, W)	Ratification
Dominican Republic	000000001963-09-16-0000Sep 16, 1963 (W) 000000001963-09-17-0000Sep 17, 1963 (L, M)	000000001964-06-03-0000Jun 3, 1964 (M) 000000001964-06-18-0000Jun 18, 1964 (L) 000000001964-07-22-0000Jul 22, 1964 (W)	Ratification
Ecuador	000000001963-09-27-0000Sep 27, 1963 (W) 000000001963-10-01-0000Oct 1, 1963 (L, W)	000000001964-05-06-0000May 6, 1964 (W) 000000001964-05-08-0000May 8, 1964 (L) 000000001964-11-13-0000Nov 13, 1964 (M)	Ratification
Egypt	000000001963-08-08-0000Aug 8, 1963 (L, M, W)	000000001964-01-10-0000Jan 10, 1964 (L, M, W)	Ratification as the United Arab Republic
El Salvador	000000001963-08-21-0000Aug 21, 1963 (W) 000000001963-08-22-0000Aug 22, 1963 (L, M)	000000001964-12-03-0000Dec 3, 1964 (W) 000000001964-12-07-0000Dec 7, 1964 (L) 000000001965-02-09-0000Feb 9, 1965 (M)	Ratification
Equatorial Guinea		000000001989-01-16-0000Jan 16, 1989 (M)	Accession
Fiji		000000001972-07-14-0000Jul 14, 1972 (M) 000000001972-07-18-0000Jul 18, 1972 (W) 000000001972-08-14-0000Aug 14, 1972 (L)	Succession from United Kingdom
Finland	000000001963-08-08-0000Aug 8, 1963 (L, M, W)	000000001964-01-09-0000Jan 9, 1964 (L, M, W)	Ratification
Gabon	000000001963-09-10-0000Sep 10, 1963 (W)	000000001964-02-20-0000Feb 20, 1964 (W) 000000001964-03-04-0000Mar 4, 1964 (L) 000000001964-03-09-0000Mar 9, 1964 (M)	Ratification
Gambia		000000001965-04-27-0000Apr 27, 1965 (M, W) 000000001965-05-06-0000May 6, 1965 (L)	Succession from United Kingdom
Germany	000000001963-08-19-0000Aug 19, 1963 (L, M, W)	000000001964-12-01-0000Dec 1, 1964 (L, W)	Ratification as West Germany Also East Germany Signed 000000001963-08-08-0000Aug 8, 1963 Ratified 000000001963-12-30-0000Dec 30, 1963
Ghana	000000001963-08-09-0000Aug 9, 1963 (W) 000000001963-09-04-0000Sep 4, 1963 (L, M)	000000001963-11-27-0000Nov 27, 1963 (L) 000000001964-01-09-0000Jan 9, 1964 (W) 000000001965-05-31-0000May 31, 1965 (M)	Ratification
Greece	000000001963-08-08-0000Aug 8, 1963 (W) 000000001963-08-09-0000Aug 9, 1963 (L, M)	000000001963-12-18-0000Dec 18, 1963 (L, M, W)	Ratification as Kingdom of Greece
Guatemala	000000001963-09-23-0000Sep 23, 1963 (W)	000000001964-01-06-0000Jan 6, 1964 (W)	Ratification
Guinea-Bissau		000000001976-08-20-0000Aug 20, 1976 (M)	Accession
Honduras	000000001963-08-08-0000Aug 8, 1963 (W) 000000001963-08-15-0000Aug 15, 1963 (L, M)	000000001964-10-02-0000Oct 2, 1964 (W) 000000001964-12-02-0000Dec 2, 1964 (L)	Ratification
Hungary	000000001963-08-08-0000Aug 8, 1963 (L, M, W)	000000001963-10-21-0000Oct 21, 1963 (L, M) 000000001963-10-22-0000Oct 22, 1963 (W)	Ratification as the People's Republic of Hungary
Iceland	000000001963-08-12-0000Aug 12, 1963 (L, M, W)	000000001964-04-29-0000Apr 29, 1964 (L, M, W)	Ratification
India	000000001963-08-08-0000Aug 8, 1963 (L, M, W)	000000001963-10-10-0000Oct 10, 1963 (L) 000000001963-10-14-0000Oct 14, 1963 (M) 000000001963-10-18-0000Oct 18, 1963 (W)	Ratification
Indonesia	000000001963-08-23-0000Aug 23, 1963 (L, M, W)	000000001964-01-20-0000Jan 20, 1964 (M) 000000001964-01-27-0000Jan 27, 1964 (W) 000000001964-05-08-0000May 8, 1964 (L)	Ratification
Iran	000000001963-08-08-0000Aug 8, 1963 (L, M, W)	000000001964-05-05-0000May 5, 1964 (L, M, W)	Ratification as the Empire of Iran
Iraq	000000001963-08-13-0000Aug 13, 1963 (L, M, W)	000000001964-11-30-0000Nov 30, 1964 (L) 000000001964-12-01-0000Dec 1, 1964 (W) 000000001964-12-03-0000Dec 3, 1964 (M)	Ratification
Ireland	000000001963-08-08-0000Aug 8, 1963 (L, M, W)	000000001963-12-18-0000Dec 18, 1963 (L, W) 000000001963-12-20-0000Dec 20, 1963 (M)	Ratification
Israel	000000001963-08-08-0000Aug 8, 1963 (L, M, W)	000000001964-01-15-0000Jan 15, 1964 (L, W) 000000001964-01-28-0000Jan 28, 1964 (M)	Ratification
Italy	000000001963-08-08-0000Aug 8, 1963 (L, M, W)	000000001964-12-10-0000Dec 10, 1964 (L, M, W)	Ratification
Jamaica	000000001963-08-13-0000Aug 13, 1963 (L, M, W)	000000001991-11-11-0000Nov 11, 1991 (M) 000000001991-11-22-0000Nov 22, 1991 (W)	Ratification
Japan	000000001963-08-14-0000Aug 14, 1963 (L, M, W)	000000001964-06-15-0000Jun 15, 1964 (L, M, W)	Ratification
Jordan	000000001963-08-12-0000Aug 12, 1963 (L, M, W)	000000001964-05-29-0000May 29, 1964 (L) 000000001964-07-07-0000Jul 7, 1964 (M) 000000001964-07-10-0000Jul 10, 1964 (W)	Ratification
Kenya		000000001965-06-10-0000Jun 10, 1965 (L) 000000001965-06-11-0000Jun 11, 1965 (W) 000000001965-06-30-0000Jun 30, 1965 (M)	Accession
Kuwait	000000001963-08-20-0000Aug 20, 1963 (L, M, W)	000000001965-05-20-0000May 20, 1965 (W) 000000001965-05-21-0000May 21, 1965 (L) 000000001965-06-17-0000Jun 17, 1965 (M)	Ratification
Laos	000000001963-08-12-0000Aug 12, 1963 (L, M, W)	000000001965-02-10-0000Feb 10, 1965 (L) 000000001965-02-12-0000Feb 12, 1965 (W) 000000001965-04-07-0000Apr 7, 1965 (M)	Ratification as the Kingdom of Laos
Lebanon	000000001963-08-12-0000Aug 12, 1963 (W) 000000001963-08-13-0000Aug 13, 1963 (L, M)	000000001965-05-14-0000May 14, 1965 (W) 000000001965-05-20-0000May 20, 1965 (L) 000000001965-06-04-0000Jun 4, 1965 (M)	Ratification
Liberia	000000001963-08-08-0000Aug 8, 1963 (W) 000000001963-08-16-0000Aug 16, 1963 (L, M)	000000001964-05-19-0000May 19, 1964 (W) 000000001964-05-22-0000May 22, 1964 (L) 000000001964-06-16-0000Jun 16, 1964 (M)	Ratification
Libya	000000001963-08-09-0000Aug 9, 1963 (L, M) 000000001963-08-16-0000Aug 16, 1963 (W)	000000001968-07-15-0000Jul 15, 1968 (L)	Ratification as the Kingdom of Libya
Luxembourg	000000001963-08-13-0000Aug 13, 1963 (L) 000000001963-09-03-0000Sep 3, 1963 (W) 000000001963-09-13-0000Sep 13, 1963 (M)	000000001965-02-10-0000Feb 10, 1965 (L, M, W)	Ratification
Madagascar	000000001963-09-23-0000Sep 23, 1963 (W)	000000001965-03-15-0000Mar 15, 1965 (W)	Ratification
Malawi		000000001964-11-26-0000Nov 26, 1964 (M) 000000001964-11-29-0000Nov 29, 1964 (W) 000000001965-01-07-0000Jan 7, 1965 (L)	Succession from United Kingdom
Malaysia	000000001963-08-08-0000Aug 8, 1963 (W) 000000001963-08-12-0000Aug 12, 1963 (L) 000000001963-08-21-0000Aug 21, 1963 (M)	000000001964-07-15-0000Jul 15, 1964 (M) 000000001964-07-16-0000Jul 16, 1964 (L, W)	Ratification
Malta		000000001964-11-25-0000Nov 25, 1964 (M, W) 000000001964-12-01-0000Dec 1, 1964 (L)	Succession from United Kingdom
Mauritania	000000001963-09-13-0000Sep 13, 1963 (W) 000000001963-09-17-0000Sep 17, 1963 (L, M)	000000001964-04-06-0000Apr 6, 1964 (W) 000000001964-04-15-0000Apr 15, 1964 (L) 000000001964-04-28-0000Apr 28, 1964 (M)	Ratification
Mauritius		000000001969-04-30-0000Apr 30, 1969 (M, W) 000000001969-05-12-0000May 12, 1969 (L)	Succession from United Kingdom
Mexico	000000001963-08-08-0000Aug 8, 1963 (L, M, W)	000000001963-12-27-0000Dec 27, 1963 (L, M, W)	Ratification
Mongolia	000000001963-08-08-0000Aug 8, 1963 (L, M)	000000001963-11-01-0000Nov 1, 1963 (M) 000000001963-11-07-0000Nov 7, 1963 (L)	Ratification as the Mongolian People's Republic
Montenegro		000000002006-06-03-0000Jun 3, 2006 (M) 000000002006-12-12-0000Dec 12, 2006 (L)	Succession from Serbia and Montenegro^{[lower-alpha 1]}
Morocco	000000001963-08-27-0000Aug 27, 1963 (W) 000000001963-08-30-0000Aug 30, 1963 (L, M)	000000001966-02-01-0000Feb 1, 1966 (L) 000000001966-02-18-0000Feb 18, 1966 (M) 000000001966-02-21-0000Feb 21, 1966 (W)	Ratification
Myanmar	000000001963-08-14-0000Aug 14, 1963 (L, M, W)	000000001963-11-15-0000Nov 15, 1963 (L, M, W)	Ratification as Union of Burma
Nepal	000000001963-08-26-0000Aug 26, 1963 (L, M) 000000001963-08-30-0000Aug 30, 1963 (W)	000000001964-10-07-0000Oct 7, 1964 (L, M, W)	Ratification as the Kingdom of Nepal
Netherlands	000000001963-08-09-0000Aug 9, 1963 (L, M, W)	000000001964-09-14-0000Sep 14, 1964 (L, M, W)	Ratification
New Zealand	000000001963-08-08-0000Aug 8, 1963 (L, M, W)	000000001963-10-10-0000Oct 10, 1963 (L, W) 000000001963-10-16-0000Oct 16, 1963 (M)	Ratification
Nicaragua	000000001963-08-13-0000Aug 13, 1963 (L, M, W)	000000001965-01-26-0000Jan 26, 1965 (L) 000000001965-02-26-0000Feb 26, 1965 (M, W)	Ratification
Niger	000000001963-09-24-0000Sep 24, 1963 (L, M, W)	000000001964-07-03-0000Jul 3, 1964 (M) 000000001964-07-06-0000Jul 6, 1964 (L) 000000001964-07-09-0000Jul 9, 1964 (W)	Ratification
Nigeria	000000001963-09-02-0000Sep 2, 1963 (L) 000000001963-09-04-0000Sep 4, 1963 (W) 000000001964-09-02-0000Sep 2, 1964 (M)	000000001967-02-17-0000Feb 17, 1967 (L) 000000001967-02-25-0000Feb 25, 1967 (M) 000000001967-02-28-0000Feb 28, 1967 (W)	Ratification
Norway	000000001963-08-09-0000Aug 9, 1963 (L, M, W)	000000001963-11-21-0000Nov 21, 1963 (L, M, W)	Ratification
Pakistan	000000001963-08-14-0000Aug 14, 1963 (L, M, W)	000000001988-03-03-0000Mar 3, 1988 (L)	Ratification
Panama	000000001963-09-20-0000Sep 20, 1963 (W)	000000001966-02-24-0000Feb 24, 1966 (W)	Ratification
Papua New Guinea		000000001980-10-27-0000Oct 27, 1980 (L) 000000001980-11-13-0000Nov 13, 1980 (M) 000000001981-03-16-0000Mar 16, 1981 (W)	Succession from Australia
Peru	000000001963-08-23-0000Aug 23, 1963 (L, M, W)	000000001964-07-20-0000Jul 20, 1964 (W) 000000001964-08-04-0000Aug 4, 1964 (L) 000000001964-08-21-0000Aug 21, 1964 (M)	Ratification
Philippines	000000001963-08-08-0000Aug 8, 1963 (L, M, W)	000000001965-11-10-0000Nov 10, 1965 (L) 000000001965-11-15-0000Nov 15, 1965 (W) 000000001966-02-08-0000Feb 8, 1966 (M)	Ratification
Poland	000000001963-08-08-0000Aug 8, 1963 (L, M, W)	000000001963-10-14-0000Oct 14, 1963 (L, M, W)	Ratification as People's Republic of Poland
Romania	000000001963-08-08-0000Aug 8, 1963 (L, M, W)	000000001963-12-12-0000Dec 12, 1963 (L, M, W)	Ratification as People's Republic of Romania
Russia	000000001963-08-05-0000Aug 5, 1963 (L, M, W)	000000001963-10-10-0000Oct 10, 1963 (L, M, W)	Ratification as Soviet Union
Rwanda	000000001963-09-19-0000Sep 19, 1963 (W)	000000001963-10-22-0000Oct 22, 1963 (L) 000000001963-12-16-0000Dec 16, 1963 (M) 000000001963-12-27-0000Dec 27, 1963 (W)	Ratification
Samoa	000000001963-09-05-0000Sep 5, 1963 (L, M) 000000001963-09-06-0000Sep 6, 1963 (W)	000000001965-01-15-0000Jan 15, 1965 (W) 000000001965-01-19-0000Jan 19, 1965 (L) 000000001965-02-08-0000Feb 8, 1965 (M)	Ratification as Western Samoa
San Marino	000000001963-09-17-0000Sep 17, 1963 (W) 000000001963-09-20-0000Sep 20, 1963 (L, M)	000000001964-07-03-0000Jul 3, 1964 (L) 000000001964-07-09-0000Jul 9, 1964 (W) 000000001964-11-27-0000Nov 27, 1964 (M)	Ratification
Senegal	000000001963-09-20-0000Sep 20, 1963 (W) 000000001963-09-23-0000Sep 23, 1963 (L, M)	000000001964-05-06-0000May 6, 1964 (L) 000000001964-05-12-0000May 12, 1964 (M) 000000001964-06-02-0000Jun 2, 1964 (W)	Ratification
Serbia	000000001963-08-08-0000Aug 8, 1963 (M)	000000001964-01-31-0000Jan 31, 1964 (M)	Ratification as SFR Yugoslavia Succession as FR Yugoslavia (later known as Serbia and Montenegro) Succession as Serbia on 000000002006-06-03-0000Jun 3, 2006
Seychelles		000000001985-03-12-0000Mar 12, 1985 (L) 000000001985-03-14-0000Mar 14, 1985 (M) 000000001985-04-08-0000Apr 8, 1985 (W)	Accession
Sierra Leone	000000001963-09-04-0000Sep 4, 1963 (L, M) 000000001963-09-11-0000Sep 11, 1963 (W)	000000001964-02-21-0000Feb 21, 1964 (L) 000000001964-03-04-0000Mar 4, 1964 (W) 000000001964-04-29-0000Apr 29, 1964 (M)	Ratification
Singapore		000000001968-07-12-0000Jul 12, 1968 (M, W) 000000001968-07-23-0000Jul 23, 1968 (L)	Succession from Malaysia
Slovakia		000000001993-01-01-0000Jan 1, 1993 (M, W) 000000001993-05-17-0000May 17, 1993 (L)	Succession from Czechoslovakia Signed 000000001963-08-08-0000Aug 8, 1963 Ratified 000000001963-10-14-0000Oct 14, 1963
Slovenia		000000001992-04-07-0000Apr 7, 1992 (L) 000000001992-08-20-0000Aug 20, 1992 (W)	Succession from SFR Yugoslavia
South Africa		000000001963-10-10-0000Oct 10, 1963 (L, W) 000000001963-11-22-0000Nov 22, 1963 (M)	Accession
South Korea	000000001963-08-30-0000Aug 30, 1963 (L, W)	000000001964-07-24-0000Jul 24, 1964 (L, W)	Ratification
Spain	000000001963-08-13-0000Aug 13, 1963 (W) 000000001963-08-14-0000Aug 14, 1963 (L)	000000001964-12-17-0000Dec 17, 1964 (L, W)	Ratification as Spanish State
Sri Lanka	000000001963-08-22-0000Aug 22, 1963 (L, W) 000000001963-08-23-0000Aug 23, 1963 (M)	000000001964-02-05-0000Feb 5, 1964 (W) 000000001964-02-12-0000Feb 12, 1964 (M) 000000001964-02-13-0000Feb 13, 1964 (L)	Ratification as Dominion of Ceylon
Sudan	000000001963-08-09-0000Aug 9, 1963 (L, M, W)	000000001966-03-04-0000Mar 4, 1966 (L, W) 000000001966-03-28-0000Mar 28, 1966 (M)	Ratification
Suriname		000000001993-01-06-0000Jan 6, 1993 (L) 000000001993-04-09-0000Apr 9, 1993 (W)	Accession
Swaziland		000000001969-05-29-0000May 29, 1969 (L, W) 000000001969-06-03-0000Jun 3, 1969 (M)	Accession
Sweden	000000001963-08-12-0000Aug 12, 1963 (L, M, W)	000000001963-12-09-0000Dec 9, 1963 (L, M, W)	Ratification
Switzerland	000000001963-08-26-0000Aug 26, 1963 (L, M, W)	000000001964-01-16-0000Jan 16, 1964 (L, M, W)	Ratification
Syria	000000001963-08-13-0000Aug 13, 1963 (L, M, W)	000000001964-06-01-0000Jun 1, 1964 (L, M, W)	Ratification
Tanzania	000000001963-09-16-0000Sep 16, 1963 (L) 000000001963-09-18-0000Sep 18, 1963 (W) 000000001963-09-20-0000Sep 20, 1963 (M)	000000001964-02-06-0000Feb 6, 1964 (L)	Ratification
Thailand	000000001963-08-08-0000Aug 8, 1963 (L, M, W)	000000001963-11-15-0000Nov 15, 1963 (L) 000000001963-11-21-0000Nov 21, 1963 (M) 000000001963-11-29-0000Nov 29, 1963 (W)	Ratification
Togo	000000001963-09-18-0000Sep 18, 1963 (W)	000000001964-12-07-0000Dec 7, 1964 (W)	Ratification
Tonga		000000001971-06-22-0000Jun 22, 1971 (M) 000000001971-07-07-0000Jul 7, 1971 (L, W)	Succession from United Kingdom
Trinidad and Tobago	000000001963-08-12-0000Aug 12, 1963 (L, M, W)	000000001964-07-14-0000Jul 14, 1964 (W) 000000001964-07-16-0000Jul 16, 1964 (L) 000000001964-08-06-0000Aug 6, 1964 (M)	Ratification
Tunisia	000000001963-08-08-0000Aug 8, 1963 (W) 000000001963-08-12-0000Aug 12, 1963 (L, M)	000000001965-05-26-0000May 26, 1965 (L, M) 000000001965-06-03-0000Jun 3, 1965 (W)	Ratification
Turkey	000000001963-08-09-0000Aug 9, 1963 (L, M, W)	000000001965-07-08-0000Jul 8, 1965 (L, M, W)	Ratification
Uganda	000000001963-08-29-0000Aug 29, 1963 (L, W)	000000001964-03-24-0000Mar 24, 1964 (L) 000000001964-04-02-0000Apr 2, 1964 (W)	Ratification
Ukraine	000000001963-10-08-0000Oct 8, 1963 (M)	000000001963-12-30-0000Dec 30, 1963 (M)	Ratification as Ukrainian SSR
United Kingdom	000000001963-08-05-0000Aug 5, 1963 (L, M, W)	000000001963-10-10-0000Oct 10, 1963 (L, M, W)	Ratification
United States	000000001963-08-05-0000Aug 5, 1963 (L, M, W)	000000001963-10-10-0000Oct 10, 1963 (L, M, W)	Ratification
Uruguay	000000001963-08-12-0000Aug 12, 1963 (W) 000000001963-09-27-0000Sep 27, 1963 (L, M)	000000001969-02-25-0000Feb 25, 1969 (L)	Ratification
Venezuela	000000001963-08-16-0000Aug 16, 1963 (W) 000000001963-08-20-0000Aug 20, 1963 (L, M)	000000001965-02-22-0000Feb 22, 1965 (M) 000000001965-03-03-0000Mar 3, 1965 (L) 000000001965-03-29-0000Mar 29, 1965 (W)	Ratification
Yemen		000000001979-06-01-0000Jun 1, 1979 (M)	Accession as South Yemen Also signed by North Yemen on 000000001963-09-06-0000Sep 6, 1963 prior to Yemeni unification
Zambia		000000001965-01-11-0000Jan 11, 1965 (M, W) 000000001965-02-08-0000Feb 8, 1965 (L)	Succession from United Kingdom

Notes

↑ Montenegro's effective date of succession was 3 June 2006.^[6]

Partially recognized state abiding by treaty

The Republic of China (Taiwan), which is currently only recognized by 21 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".^[2]

State	Signed	Deposited	Method
Republic of China	000000001963-08-23-0000Aug 23, 1963 (M)	000000001964-05-18-0000May 18, 1964 (M)	Ratification

States that have signed but not ratified

State	Signed
Algeria	000000001963-08-14-0000Aug 14, 1963 (L, M, W)
Burkina Faso	000000001963-08-30-0000Aug 30, 1963 (W)
Burundi	000000001963-10-04-0000Oct 4, 1963 (W)
Cameroon	000000001963-08-27-0000Aug 27, 1963 (W) 000000001963-09-06-0000Sep 6, 1963 (L)
Ethiopia	000000001963-08-09-0000Aug 9, 1963 (L, M, W)
Haiti	000000001963-10-09-0000Oct 9, 1963 (W)
Mali	000000001963-08-23-0000Aug 23, 1963 (L, M, W)
Paraguay	000000001963-08-15-0000Aug 15, 1963 (L, M, W)
Portugal	000000001963-10-09-0000Oct 9, 1963 (L, W)
Somalia	000000001963-08-19-0000Aug 19, 1963 (M, W)

Non-signatory states

The remaining UN member states and UN observer states, which have not signed the treaty, are:

Notes

↑ 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.^[4]

References

1 2 "Treaty Banning Nuclear Weapon Tests in the Atmosphere, in Outer Space and Under Water". United Nations Office for Disarmament Affairs. Retrieved 2013-02-24.
1 2 "China: Ratification of Partial Test Ban Treaty". United Nations Office for Disarmament Affairs. 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 (PDF) 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 2014-03-04.
1 2 "Treaty Banning Nuclear Weapon Tests in the Atmosphere, in Outer Space and Under Water" (PDF). United States Department of State. 2010-10-06. Retrieved 2013-07-23.
↑ Договор о запрещении испытаний ядерного оружия в атмосфере, в космическом пространстве и под водой (in Russian). Ministry of Foreign Affairs of Russia. 2013-01-16. Retrieved 2015-08-28.
↑ "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

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