Comprehensive Nuclear-Test-Ban Treaty (CTBT)

Ongoing

The CTBT bans all nuclear explosions anywhere on Earth whether for military or peaceful purposes.

Adopted: 10 September 1996
Entered into force: not yet in force
Ratifications: 177 (see table below).
Signatures: 187 (all of which are members of the "Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization" in Vienna, Austria)
Annex 2 states that have signed and ratified the Treaty: 35 (44 states required) (not ratified: China (People's Republic of), Democratic People's Republic of Korea, Egypt, India, Iran, Israel, Pakistan, Russia and the United States.)

The text of the CTBT is available here.

The current status of the CTBT is available here.

The following articles related to the CTBT were published in the Nuclear Law Bulletin:

Comprehensive Ban on Nuclear Tests, by J. Bourgois (NLB 59, p. 7).
The Comprehensive Nuclear Test Ban Treaty – Eight Years After the Opening of the Treaty for Signature: What is the Situation?, by G. Le Goff and D. Rousseau (NLB 74, p. 9).

Contracting States to the Comprehensive Nuclear Test Ban Treaty
Afghanistan	Congo	Honduras	Monaco	Seychelles
Albania	Cook Islands	Hungary*	Mongolia	Sierra Leone
Algeria	Costa Rica	Iceland	Montenegro	Singapore
Andorra	Côte d'Ivoire	Indonesia	Morocco	Slovak Republic*
Angola	Croatia	Iraq	Mozambique	Slovenia*
Antigua and Barbuda	Cuba	Ireland	Myanmar	Solomon Islands
Argentina*	Cyprus	Italy	Namibia	South Africa*
Armenia*	Czechia*	Jamaica	Nauru	Spain*
Australia	Democratic Republic of the Congo	Japan*	Netherlands*	Sri Lanka
Austria	Denmark	Jordan	New Zealand	Sudan
Azerbaijan	Djibouti	Kazakhstan	Nicaragua	Suriname
Bahamas	Dominica	Kenya	Niger	Sweden*
Bahrain	Dominican Republic	Kiribati	Nigeria	Switzerland*
Bangladesh	Ecuador	Korea*	Niue	Tajikistan
Barbados	El Salvador	Kuwait	North Macedonia	Tanzania
Belarus*	Equatorial Guinea	Kyrgyzstan	Norway	Thailand
Belgium*	Eritrea	Lao People's Democratic Republic	Oman	Timor-Leste
Belize	Estonia	Latvia	Palau	Togo
Benin	Eswatini	Lebanon	Palestinian Authority	Trinidad and Tobago
Bolivia	Ethiopia	Lesotho	Panama	Tunisia
Bosnia and Herzegovina	Fiji	Liberia	Paraguay	Türkiye
Botswana	Finland*	Libya	Peru	Turkmenistan
Brazil*	France*	Liechtenstein	Philippines	Tuvalu
Brunei Darussalam	Gabon	Lithuania	Poland	Uganda
Bulgaria*	Gambia	Luxembourg	Portugal	Ukraine*
Burkina Faso	Georgia	Madagascar	Qatar	United Arab Emirates*
Burundi	Germany	Malawi	Romania*	United Kingdom*
Cabo Verde	Ghana	Malaysia	Rwanda	Uruguay
Cambodia	Greece	Maldives	Saint Kitts and Nevis	Uzbekistan
Cameroon	Grenada	Mali	Saint Lucia	Vanuatu
Canada*	Guatemala	Malta	Saint Vincent and the Grenadines	Venezuela
Central African Republic	Guinea	Marshall Islands	Samoa	Viet Nam
Chad	Guinea-Bissau	Mauritania	San Marino	Zambia
Chile	Guyana	Mexico*	Sao Tome and Prinicipe	Zimbabwe
Colombia	Haiti	Micronesia	Senegal
Comoros	Holy See	Moldova	Serbia

* Country with at least one nuclear power plant in operation.