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: 179 (see table below).
Signatures: 188 (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	Serbia
Albania	Cook Islands	Hungary*	Mongolia	Seychelles
Algeria	Costa Rica	Iceland	Montenegro	Sierra Leone
Andorra	Côte d'Ivoire	Indonesia	Morocco	Singapore
Angola	Croatia	Iraq	Mozambique	Slovak Republic*
Antigua and Barbuda	Cuba	Ireland	Myanmar	Slovenia*
Argentina*	Cyprus	Italy	Namibia	Solomon Islands
Armenia*	Czechia*	Jamaica	Nauru	South Africa*
Australia	Democratic Republic of the Congo	Japan*	Netherlands*	Spain*
Austria	Denmark	Jordan	New Zealand	Sri Lanka
Azerbaijan	Djibouti	Kazakhstan	Nicaragua	Sudan
Bahamas	Dominica	Kenya	Niger	Suriname
Bahrain	Dominican Republic	Kiribati	Nigeria	Sweden*
Bangladesh	Ecuador	Korea*	Niue	Switzerland*
Barbados	El Salvador	Kuwait	North Macedonia	Tajikistan
Belarus*	Equatorial Guinea	Kyrgyzstan	Norway	Tanzania
Belgium*	Eritrea	Lao People's Democratic Republic	Oman	Thailand
Belize	Estonia	Latvia	Palau	Timor-Leste
Benin	Eswatini	Lebanon	Palestinian Authority	Togo
Bolivia	Ethiopia	Lesotho	Panama	Tonga
Bosnia and Herzegovina	Fiji	Liberia	Papua New Guinea	Trinidad and Tobago
Botswana	Finland*	Libya	Paraguay	Tunisia
Brazil*	France*	Liechtenstein	Peru	Türkiye
Brunei Darussalam	Gabon	Lithuania	Philippines	Turkmenistan
Bulgaria*	Gambia	Luxembourg	Poland	Tuvalu
Burkina Faso	Georgia	Madagascar	Portugal	Uganda
Burundi	Germany	Malawi	Qatar	Ukraine*
Cabo Verde	Ghana	Malaysia	Romania*	United Arab Emirates*
Cambodia	Greece	Maldives	Rwanda	United Kingdom*
Cameroon	Grenada	Mali	Saint Kitts and Nevis	Uruguay
Canada*	Guatemala	Malta	Saint Lucia	Uzbekistan
Central African Republic	Guinea	Marshall Islands	Saint Vincent and the Grenadines	Vanuatu
Chad	Guinea-Bissau	Mauritania	Samoa	Venezuela
Chile	Guyana	Mexico*	San Marino	Viet Nam
Colombia	Haiti	Micronesia	Sao Tome and Prinicipe	Zambia
Comoros	Holy See	Moldova	Senegal	Zimbabwe

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