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former IAEA Director-General

The Status of the Comprehensive Test Ban Treaty: Signatories and Ratifiers
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Contact: Daryl Kimball, Executive Director, (202) 463-8270 x107

Updated: July 2017

Despite nearly 20 years of global efforts to promote the entry into force of the Comprehensive Test Ban Treaty (CTBT), the treaty’s enactment appears a long way off.

President George H. W. Bush signed into law the unilateral declaration to forego full-scale nuclear weapons testing October 2, 1992. The United States signed the CTBT on September 24, 1996, the day it opened for signature, but the Senate dealt a severe blow to the near-term prospects for U.S. participation when it refused to provide its advice and consent October 13, 1999. President Obama, however, stated in February 2009 that he intended to pursue Senate advice and consent to ratification of the treaty "immediately and aggressively."

The CTBT will formally enter into force after 44 designated “nuclear-capable states” (as listed in Annex 2 of the treaty) have deposited their instruments of ratification with the UN secretary-general. To date, 183 states have signed and 166 have ratified the treaty. Yet of the 44 specified countries, India, Pakistan, and North Korea still have not signed, and only 36 have ratified the treaty.

For more information on the CTBT, see Comprehensive Test Ban Treaty at a Glance.

The following chart identifies the treaty’s signatories and ratifiers. States whose ratification is required for the treaty to take effect are shaded and marked with an asterisk (*).


Total Signatories: 183
Total Ratifiers: 166

Annex 2 Ratifications (out of 44): 36

Country
Signature
Ratification
Afghanistan9/24/039/24/03
Albania9/27/964/23/03
Algeria*10/15/967/11/03
Andorra9/24/967/12/06
Angola9/27/963/20/15
Antigua and Barbuda4/16/971/11/06
Argentina*9/24/9612/4/98
Armenia10/1/967/12/06
Australia*9/24/967/9/98
Austria*9/24/963/13/98
Azerbaijan7/28/972/2/99
Bahamas2/4/0511/30/07
Bahrain9/24/964/12/04
Bangladesh*10/24/963/8/00
Barbados1/14/081/14/08
Belarus9/24/969/13/00
Belgium*9/24/966/29/99
Belize11/14/013/26/04
Benin9/27/963/6/01
Buhtan  
Bolivia9/24/9610/4/99
Bosnia and Herzegovina9/24/9610/26/06
Botswana9/16/0210/28/02
Brazil*9/24/967/24/98
Brunei Darussalam1/22/971/10/13
Bulgaria*9/24/969/29/99
Burkina Faso9/27/964/17/02
Burundi9/24/969/24/08
Cambodia9/26/9611/10/00
Cameroon11/16/012/6/06
Canada*9/24/9612/18/98
Cape Verde10/1/963/1/06
Central African Republic12/19/015/26/10
Chad10/8/962/8/13
Chile*9/24/967/12/00
China*9/24/96 
Colombia*9/24/961/29/08
Comoros12/12/96 
Congo2/11/979/2/14
Cook Islands12/5/979/6/05
Costa Rica9/24/969/25/01
Côte d'Ivoire9/25/963/11/03
Croatia9/24/963/2/01
Cuba  
Cyprus9/24/967/18/03
Czech Republic11/12/969/11/97
Dem. Republic of Congo*10/4/969/28/04
Denmark9/24/9612/21/98
Djibouti10/21/967/15/05
Dominica  
Dominican Republic10/3/969/4/07
Ecuador9/24/9611/12/01
Egypt*10/14/96 
El Salvador9/24/969/11/98
Equatorial Guinea10/9/96 
Eritrea11/11/0311/11/03
Estonia11/20/968/13/99
Ethiopia9/25/968/8/06
Fiji9/24/9610/10/96
Finland*9/24/961/15/99
France*9/24/964/6/98
Gabon10/7/969/20/00
Gambia4/9/03 
Georgia9/24/969/27/02
Germany*9/24/968/20/98
Ghana10/3/9606/14/11
Greece9/24/964/21/99
Grenada10/10/968/19/98
Guatemala9/20/991/12/12
Guinea10/3/9609/20/11
Guinea-Bissau4/11/9709/30/13
Guyana9/7/003/7/01
Haiti9/24/9612/1/05
Holy See9/24/967/18/01
Honduras9/25/9610/30/03
Hungary*9/25/967/13/99
Iceland9/24/96

6/26/00

India*  
Indonesia*9/24/962/6/12
Iran*9/24/96 
Iraq8/19/0809/26/13
Ireland9/24/967/15/99
Israel*9/25/96 
Italy*9/24/962/1/99
Jamaica11/11/9611/13/01
Japan*9/24/967/8/97
Jordan9/26/968/25/98
Kazakhstan9/30/965/14/02
Kenya11/14/9611/30/00
Kiribati9/7/009/7/00
Kuwait9/24/965/6/03
Kyrgyzstan10/8/9610/02/03
Laos7/30/9710/5/00
Latvia9/24/9611/20/01
Lebanon9/16/0511/21/08
Lesotho9/30/969/14/99
Liberia10/1/968/17/09
Libya11/13/011/6/04
Liechtenstein9/27/969/21/04
Lithuania10/7/962/7/00
Luxembourg9/24/965/26/99
Macedonia10/29/983/14/00
Madagascar10/9/969/15/05
Malawi10/9/9611/21/08
Malaysia7/23/981/17/08
Maldives10/1/979/7/00
Mali2/18/978/4/99
Malta9/24/967/23/01
Marshall Islands9/24/9610/28/09
Mauritania9/24/964/30/03
Maritius  
Mexico*9/24/9610/5/99
Micronesia9/24/967/25/97
Moldova9/24/971/16/07
Monaco10/1/9612/18/98
Mongolia10/1/968/8/97
Montenegro10/23/0610/23/06
Morocco9/24/964/17/00
Mozambique9/26/9611/4/08
Myanmar11/25/969/21/16
Namibia9/24/966/29/01
Nauru9/8/0011/12/01
Nepal10/8/96 
Netherlands*9/24/963/23/99
New Zealand9/27/963/19/99
Nicaragua9/24/9612/5/00
Niger10/3/969/9/02
Nigeria9/8/00

9/27/01

Niue4/9/123/5/14
North Korea*  
Norway*9/24/967/15/99
Oman9/23/996/13/03
Pakistan*  
Palau8/12/038/1/07
Panama9/24/963/23/99
Papua New Guinea9/25/96 
Paraguay9/25/9610/4/01
Peru*9/25/9611/12/97
Philippines9/24/962/23/01
Poland*9/24/965/25/99
Portugal9/24/966/26/00
Qatar9/24/963/3/97
Romania*9/24/9610/5/99
Russia*9/24/966/30/00
Rwanda11/30/'200411/30/04
St. Kitts and Nevis3/33/044/27/05
St. Lucia10/4/964/5/01
St. Vincent and the Grenadines7/2/099/23/09
Samoa10/9/969/27/02
San Marino10/7/963/12/02
Sao Tome and Principe9/26/96 
Saudi Arabia  
Senegal9/26/966/9/99
Serbia and Montenegro6/8/015/19/04
Seychelles9/24/964/13/04
Sierra Leone9/8/009/17/01
Singapore1/14/9911/10/01
Slovakia*9/30/963/3/98
Slovenia9/24/968/31/99
Solomon Islands10/3/96 
Somalia  
South Africa*9/24/963/30/99
South Korea*9/24/969/24/99
South Sudan  
Spain*9/24/967/31/98
Sri Lanka10/24/96 
Sudan6/10/046/10/04
Suriname1/14/972/7/06
Swaziland9/24/969/21/16
Sweden*9/24/9612/2/98
Switzerland*9/24/9610/1/99
Syria  
Tajikistan10/7/966/10/98
Tarzania9/30/049/30/04
Thailand11/12/96 
Timor-Leste9/26/08 
Togo10/2/967/2/04
Tonga  
Trinidad and Tobago10/8/095/26/10
Tunisia10/16/969/23/04
Turkey*9/24/962/16/00
Turkmenistan9/24/962/20/98
Tuvalu  
Uganda11/7/963/14/01
Ukraine*9/27/962/23/01
United Arab Emirates9/25/969/18/00
United Kingdom*9/24/964/6/98
United States*9/24/96 
Uruguay9/24/969/21/01
Uzbekistan10/3/965/29/97
Vanuatu9/24/969/16/05
Venezuela10/3/965/13/02
Viet Nam*9/24/963/10/06
Yemen9/30/96 
Zambia12/3/962/23/06
Zimbabwe10/13/99 

Posted: July 19, 2017