Login/Logout

*
*  

"[Arms Control Today is] Absolutely essential reading for the upcoming Congressional budget debate on the 2018 NPR and its specific recommendations ... well-informed, insightful, balanced, and filled with common sense."

– Frank Klotz
former Administrator of the National Nuclear Security Administration
March 7, 2018
The CTB Treaty: Signatories and Ratifiers

The Comprehensive Test Ban Treaty (CTBT) was opened for signature at the United Nations on September 24, 1996. President Clinton was the first to sign the treaty that day, followed by the representatives of 70 other nations, including Britain, France, Russia and China. To date, 155 states have signed the CTBT and 51 have ratified.

The CTBT will formally enter into force after 44 nuclear-capable states, specified in Annex 2 of the treaty, have deposited their instruments of ratification with the secretary-general of the United Nations. Those 44 states include the five declared nuclear powers, India, Israel, Pakistan and 36 other states that are recognized by the International Atomic Energy Agency as possessing nuclear power and/or research reactors.

The near-term prospects for entry into force were dealt a severe blow October 13 when the United States Senate voted against ratification of the treaty, prompting harsh international criticism and raising fears that some states might resume nuclear testing. (See press conference, and news article.) The vote came just days after states that have already ratified the CTBT held a conference in Vienna to consider measures to bring the treaty into force.

Of the 44 specified nations, all except India, Pakistan and North Korea have signed, but only 26 have ratified the treaty. Britain and France are the only declared nuclear-weapon states to have ratified. The following chart identifies the Comprehensive Test Ban Treaty's signatories and ratifiers as of October 31, 1999. States whose ratification is required for entry into force are in bold.

Country Signature Ratification
Albania 9/27/96  
Algeria 10/15/96  
Andorra 9/24/96  
Angola 9/27/96  
Antigua and Barbuda 4/16/97  
Argentina 9/24/96 12/4/98
Armenia 10/1/96  
Australia 9/24/96 7/9/98
Austria 9/24/96 3/13/98
Azerbaijan 7/28/97 2/2/99
Bahrain 9/24/96  
Bangladesh 10/24/96  
Belarus 9/24/96  
Belgium 9/24/96 6/29/99
Benin 9/27/96  
Bolivia 9/24/96 10/4/99
Country Signature Ratification
Bosnia and Herzegovina 9/24/96  
Brazil 9/24/96 7/24/99
Brunei Darussalem 1/22/97  
Bulgaria 9/24/96 9/29/99
Burkina Faso 9/27/96  
Burundi 9/24/96  
Cambodia 9/26/96  
Canada 9/24/96 12/18/98
Cape Verde 10/1/96  
Chad 10/8/96  
Chile 9/24/96  
China 9/24/96  
Colombia 9/24/96  
Comoros 12/12/96  
Congo 2/11/97  
Congo Republic 10/4/96  
Cook Islands 12/5/97  
Costa Rica 9/24/96  
Cote d'Ivoire 9/25/96  
Croatia 9/24/96  
Cyprus 9/24/96  
Czech Republic 11/12/96 9/11/97
Denmark 9/24/96 12/21/98
Djibouti 10/21/96  
Dominican Republic 10/3/96  
Ecuador 9/24/96  
Egypt 10/14/96  
El Salvador 9/24/96 9/11/98
Equatorial Guinea 10/9/96  
Estonia 11/20/96 8/13/98
Country Signature Ratification
Ethiopia 9/25/96  
Fiji 9/24/96 10/10/96
Finland 9/24/96 1/15/99
France 9/24/96 4/6/98
Gabon 10/7/96  
Georgia 9/24/96  
Germany 9/24/96 8/20/98
Ghana 10/3/96  
Greece 9/24/96 4/21/99
Grenada 10/10/96 8/19/98
Guatemala 9/20/99  
Guinea 10/3/96  
Guinea-Bissau 4/11/97  
Haiti 9/24/96  
Holy See 9/24/96  
Honduras 9/25/96  
Hungary 9/25/96 7/13/99
Iceland 9/24/96  
Indonesia 9/24/96  
India    
Indonesia 9/24/96  
Iran 9/24/96  
Ireland 9/24/96 7/15/99
Israel 9/25/96  
Italy 9/24/96 2/1/99
Jamaica 11/11/96  
Japan 9/24/96 7/8/97
Jordan 9/26/96 8/25/98
Kazakhstan 9/30/96  
Kenya 11/14/96  
Kuwait 9/24/96  
Kyrgyzstan 10/8/96  
Laos 7/30/97  
Country Signature Ratification
Latvia 9/24/96  
Lesotho 9/30/96 9/14/99
Liberia 10/1/96  
Liechtenstein 9/27/96  
Lithuania 10/7/96  
Luxembourg 9/24/96 5/26/99
Macedonia 10/29/98  
Madagascar 10/9/96  
Malawi 10/9/96  
Malaysia 7/23/98  
Maldives 10/1/97  
Mali 2/18/97 8/4/99
Malta 9/24/96  
Marshall Islands 9/24/96  
Mauritania 9/24/96  
Mexico 9/24/96 10/5/99
Micronesia 9/24/96 7/25/97
Moldova 9/24/97  
Monaco 10/1/96 12/18/98
Mongolia 10/1/96 8/8/97
Morocco 9/24/96  
Mozambique 9/26/96  
Myanmar (Burma) 11/25/96  
Namibia 9/24/96  
Nepal 10/8/96  
Netherlands 9/24/96 3/23/99
New Zealand 9/27/96 3/19/99
Nicaragua 9/24/96  
Niger 10/3/96  
North Korea    
Norway 9/24/96 7/15/99
Oman 9/23/99  
Country Signature Ratification
Pakistan    
Panama 9/24/96  
Papua New Guinea 9/25/96  
Paraguay 9/25/96  
Peru 9/25/96 11/12/97
Philippines 9/24/96  
Poland 9/24/96 5/25/99
Portugal 9/24/96  
Qatar 9/24/96 3/3/97
Romania 9/24/96 10/5/99
Russia 9/24/96  
Saint Lucia 10/4/96  
Samoa 10/9/96  
San Marino 10/7/96  
Sao Tome and Principe 9/26/96  
Senegal 9/26/96 6/9/99
Seychelles 9/24/96  
Singapore 1/14/99  
Slovakia 9/30/96 3/3/98
Slovenia 9/24/96 8/31/99
Solomon Islands 10/3/96  
South Africa 9/24/96 3/30/99
South Korea 9/24/96 9/24/99
Spain 9/24/96 7/31/98
Sri Lanka 10/24/96  
Suriname 1/14/97  
Swaziland 9/24/96  
Sweden 9/24/96 12/2/98
Switzerland 9/24/96 10/1/99
Tajikistan 10/7/96 6/10/98
Country Signature Ratification
Thailand 11/12/96  
Togo 10/2/96  
Tunisia 10/16/96  
Turkey 9/24/96  
Turkmenistan 9/24/96 2/20/98
Uganda 11/7/96  
Ukraine 9/27/96  
United Arab Emirates 9/25/96  
United Kingdom 9/24/96 4/6/98
United States 9/24/96  
Uruguay 9/24/96  
Uzbekistan 10/3/96 5/29/97
Vanuatu 9/24/96  
Venezuela 10/3/96  
Vietnam 9/24/96  
Yemen 9/30/96  
Zambia 12/3/96  
Zimbabwe 10/13/99