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The list of parties to the Nuclear Non-Proliferation Treaty encompasses the states which have signed and ratified or acceded to the international agreement limiting the spread of nuclear weapons.
| Recognized nuclear-weapon state ratifiers Recognized nuclear weapon state acceders Other ratifiers Other acceders or succeeders | Acceder which announced its withdrawal (North Korea) Unrecognized state, abiding by treaty Non-signatories Partially recognized state which ratified (Republic of China) |
On 1 July 1968, the Nuclear Non-Proliferation Treaty (NPT) was opened for signature. The three depositary states were the Soviet Union (and later its successor state Russia), the United Kingdom, the United States; states wishing to become a party to the NPT must deposit their instruments of ratification, accession or succession with at least one of the depositary governments. The treaty came into force and closed for signature on 5 March 1970 with the deposit of ratification of the three depositary states and 40 others. Since then, states that did not sign the treaty may only accede to it.
1st decade: ratified or acceded 1968–1977
2nd decade: ratified or acceded 1978–1987
3rd decade: ratified or acceded since 1988
Never signed (India, Israel, Pakistan, South Sudan)
The treaty recognizes five states as nuclear-weapon states: the United States, Russia, the United Kingdom, France, and China (also the five permanent members of the United Nations Security Council). China and France acceded to the treaty in 1992. Four other states are known or believed to possess nuclear weapons: India, Pakistan and North Korea have openly tested and declared that they possess nuclear weapons, while Israel has had a policy of opacity regarding its nuclear weapons program. India, Israel, and Pakistan have never signed the treaty, while North Korea was a party to the treaty but announced its withdrawal on 10 January 2003, which became effective ninety days later. However, there is disagreement among the parties to the treaty whether North Korea's withdrawal was in conformity with the terms of the treaty.
The NPT remains the most widely subscribed to nuclear arms control treaty in history. As of February 2015, 190 states are recognized as parties to the treaty, excluding North Korea which withdrew. The State of Palestine is the most recent state to have joined, having submitted its instrument of succession on 10 February 2015. In addition, the Republic of China (Taiwan), which is currently only recognized by 11 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; Taiwan has accepted comprehensive International Atomic Energy Agency (IAEA) safeguards and the measures of the Additional Protocol to verify that its nuclear program is entirely peaceful. Four UN member states have never signed the treaty: India, Israel, Pakistan, and South Sudan. The Cook Islands and Niue, two associated states of New Zealand which have had their "full treaty-making capacity" recognised by United Nations Secretariat, are not parties to the treaty but consider themselves bound by its provisions by virtue of their administration by New Zealand when the latter ratified the NPT.
Ratified or acceded states
189 UN member states as well as two observers, namely the Holy See and the State of Palestine, have become parties to the NPT. However, one of these states (North Korea) submitted a notice of withdrawal. See the section #Withdrawn state below for more details.
Multiple dates indicate the different days in which states submitted their signature or deposition, varied by location. This location is noted by: (L) for London, (M) for Moscow, and (W) for Washington D.C.
Bolded states with a dagger (†) are recognized as nuclear weapons states by the treaty.
| State | Signed | Deposited | Method |
|---|---|---|---|
 Afghanistan | 1 Jul 1968 (L, M, W) | 4 Feb 1970 (W) 5 Feb 1970 (M) 5 Mar 1970 (L) | Ratification |
 Albania | 12 Sep 1990 (L) 14 Sep 1990 (M) 28 Sep 1990 (W) | Accession | |
 Algeria | 12 Jan 1995 (L, M, W) | Accession | |
 Andorra | 7 Jun 1996 (L) 25 Jun 1996 (W) 2 Jul 1996 (M) | Accession | |
 Angola | 14 Oct 1996 (W) 30 Apr 2010 (M) | Accession | |
 Antigua and Barbuda | 17 Jun 1985 (L) | Succession from  United Kingdom | |
 Argentina | 10 Feb 1995 (W) 17 Feb 1995 (L) | Accession | |
 Armenia | 21 Jun 1993 (M) 15 Jul 1993 (W) | Accession | |
 Australia | 27 Feb 1970 (L, M, W) | 23 Jan 1973 (L, M, W) | Ratification |
 Austria | 1 Jul 1968 (L, M, W) | 27 Jun 1969 (L, W) 28 Jun 1969 (M) | Ratification |
 Azerbaijan | 22 Sep 1992 (M) | Accession | |
 Bahamas | 11 Aug 1976 (L) 13 Aug 1976 (W) 30 Aug 1976 (M) | Succession from United Kingdom | |
 Bahrain | 3 Nov 1988 (W) | Accession | |
 Bangladesh | 31 Aug 1979 (L, M) 27 Sep 1979 (W) | Accession | |
 Barbados | 1 Jul 1968 (W) | 21 Feb 1980 (W) | Ratification |
 Belarus | 9 Feb 1993 (M) 22 Jul 1993 (W) 23 Jul 1993 (L) | Accession | |
 Belgium | 20 Aug 1968 (L, M, W) | 2 May 1975 (L, W) 4 May 1975 (M) | Ratification |
 Belize | 9 Aug 1985 (L) | Succession from United Kingdom | |
 Benin | 1 Jul 1968 (W) | 31 Oct 1972 (W) | Ratification |
 Bhutan | 23 May 1985 (W) | Accession | |
 Bolivia | 1 Jul 1968 (W) | 26 May 1970 (W) | Ratification |
 Bosnia and Herzegovina | 15 Aug 1994 (W) | Succession from  SFR Yugoslavia | |
 Botswana | 1 Jul 1968 (W) | 28 Apr 1969 (L) | Ratification |
 Brazil | 18 Sep 1998 (L, M, W) | Accession | |
 Brunei | 26 Mar 1985 (W) | Accession | |
 Bulgaria | 1 Jul 1968 (L, M, W) | 5 Sep 1969 (W) 18 Sep 1969 (M) 3 Nov 1969 (L) | Ratification |
 Burkina Faso | 25 Nov 1968 (W) 11 Aug 1969 (M) | 3 Mar 1970 (W) | Ratification |
 Burundi | 19 Mar 1971 (M) | Accession | |
 Cabo Verde | 24 Oct 1979 (M) | Accession | |
 Cambodia | 2 Jun 1972 (W) 25 Sep 1987 (M) | Accession | |
 Cameroon | 17 Jul 1968 (W) 18 Jul 1968 (M) | 8 Jan 1969 (W) | Ratification |
 Canada | 23 Jul 1968 (L, W) 29 Jul 1968 (M) | 8 Jan 1969 (L, M, W) | Ratification |
 Central African Republic | 25 Oct 1970 (W) | Accession | |
 Chad | 1 Jul 1968 (M) | 10 Mar 1971 (W) 11 Mar 1971 (M) 23 Mar 1971 (L) | Ratification |
 Chile | 25 May 1995 (W) | Accession | |
 China† | 9 Mar 1992 (L) 12 Mar 1992 (M) 17 Mar 1992 (W) | Accession | |
 Colombia | 1 Jul 1968 (W) | 8 Apr 1986 (W) 29 Apr 1986 (M) 30 Apr 1986 (L) | Ratification |
 Comoros | 4 Oct 1995 (W) | Accession | |
 Republic of the Congo | 26 Jul 1968 (M) | 23 Oct 1978 (W) | Ratification |
 Costa Rica | 1 Jul 1968 (W) | 3 Mar 1970 (W) | Ratification |
 Côte d'Ivoire | 1 Jul 1968 (W) | 6 Mar 1973 (W) | Ratification |
 Croatia | 29 Jun 1992 (W) | Succession from SFR Yugoslavia | |
 Cuba | 4 Nov 2002 (M) | Accession | |
 Cyprus | 1 Jul 1968 (L, M, W) | 10 Feb 1970 (M) 16 Feb 1970 (W) 5 Mar 1970 (L) | Ratification |
 Czech Republic | 1 Jan 1993 (M, W) 5 Apr 1993 (L) | Succession from Czechoslovakia Signed 1 July 1968 Deposited 22 July 1969 | |
 Democratic Republic of the Congo | 22 Jul 1968 (W) 17 Sep 1968 (L) | 4 Aug 1970 (W) | Ratification |
 Denmark | 1 Jul 1968 (L, M, W) | 3 Jan 1969 (L, M, W) | Ratification |
 Djibouti | 16 Oct 1996 (W) | Accession | |
 Dominica | 10 Aug 1984 (L) | Succession from United Kingdom | |
 Dominican Republic | 1 Jul 1968 (W) | 24 Jul 1971 (W) | Ratification |
 Ecuador | 9 Jul 1968 (W) | 7 Mar 1969 (W) | Ratification |
 Egypt | 1 Jul 1968 (L, M) | 26 Feb 1981 (L) | Ratification |
 El Salvador | 1 Jul 1968 (W) | 11 Jul 1972 (W) | Ratification |
 Equatorial Guinea | 1 Nov 1984 (W) | Accession | |
 Eritrea | 16 Mar 1995 (W) | Accession | |
 Estonia | 7 Jan 1992 (L) 31 Jan 1992 (W) | Accession | |
 Ethiopia | 5 Sep 1968 (L, M, W) | 5 Feb 1970 (M) 5 Mar 1970 (L, W) | Ratification |
 Fiji | 21 Jul 1972 (W) 14 Aug 1972 (L) 29 Aug 1972 (M) | Succession from United Kingdom | |
 Finland | 1 Jul 1968 (L, M, W) | 5 Feb 1969 (L, M, W) | Ratification |
 France† | 2 Aug 1992 (M) 3 Aug 1992 (L, W) | Accession | |
 Gabon | 19 Feb 1974 (W) | Accession | |
 Gambia | 4 Sep 1968 (L) 20 Sep 1968 (W) 24 Sep 1968 (M) | 12 May 1975 (W) | Ratification |
 Georgia | 7 Mar 1994 (W) | Accession | |
 Germany | 28 Nov 1969 (L, M, W) | 2 May 1975 (L, W) | Ratification as West Germany Also  East GermanyRatified 31 October 1969 |
 Ghana | 1 Jul 1968 (M, W) 24 Jul 1968 (L) | 4 May 1970 (L) 5 May 1970 (W) 11 May 1970 (M) | Ratification |
 Greece | 1 Jul 1968 (M, W) | 11 Mar 1970 (W) | Ratification |
 Grenada | 2 Sep 1975 (L) 3 Dec 1975 (W) | Succession from United Kingdom | |
 Guatemala | 26 Jul 1968 (W) | 22 Sep 1970 (W) | Ratification |
 Guinea | 29 Apr 1985 (M) | Accession | |
 Guinea-Bissau | 20 Aug 1976 (M) | Accession | |
 Guyana | 19 Oct 1993 (W) | Accession | |
 Haiti | 1 Jul 1968 (W) | 2 Jun 1970 (W) | Ratification |
 Holy See | 25 Feb 1971 (L, M, W) | Accession | |
 Honduras | 1 Jul 1968 (W) | 16 May 1973 (W) | Ratification |
 Hungary | 1 Jul 1968 (L, M, W) | 27 May 1969 (L, M, W) | Ratification |
 Iceland | 1 Jul 1968 (L, M, W) | 18 Jul 1969 (L, M, W) | Ratification |
 Indonesia | 2 Mar 1970 (L, M, W) | 12 Jul 1979 (L, M, W) | Ratification |
 Iran | 1 Jul 1968 (L, M, W) | 2 Feb 1970 (W) 10 Feb 1970 (M) 5 Mar 1970 (L) | Ratification |
 Iraq | 1 Jul 1968 (M) | 29 Oct 1969 (M) | Ratification |
 Ireland | 1 Jul 1968 (M, W) 4 Jul 1968 (L) | 1 Jul 1968 (W) 2 Jul 1968 (M) 4 Jul 1968 (L) | Ratification |
 Italy | 28 Jan 1969 (L, M, W) | 2 May 1975 (L, W) 4 May 1975 (M) | Ratification |
 Jamaica | 14 Apr 1969 (L, M, W) | 5 Mar 1970 (L, M, W) | Ratification |
 Japan | 3 Feb 1970 (L, M, W) | 8 Jun 1976 (L, M, W) | Ratification |
 Jordan | 10 Jul 1968 (W) | 11 Feb 1970 (W) | Ratification |
 Kazakhstan | 14 Feb 1994 (W) 21 Mar 1994 (L) 20 May 1994 (M) | Accession | |
 Kenya | 1 Jul 1968 (W) | 11 Jun 1970 (M) | Ratification |
 Kiribati | 18 Apr 1985 (L) | Succession from United Kingdom | |
 Kuwait | 15 Aug 1968 (M, W) 22 Aug 1968 (L) | 17 Nov 1989 (W) | Ratification |
 Kyrgyzstan | 5 Jul 1994 (M) | Accession | |
 Laos | 1 Jul 1968 (L, M, W) | 20 Feb 1970 (M) 5 Mar 1970 (L, W) | Ratification |
 Latvia | 31 Jan 1992 (L) | Accession | |
 Lebanon | 1 Jul 1968 (L, M, W) | 15 Jul 1970 (L, M) 20 Nov 1970 (W) | Ratification |
 Lesotho | 9 Jul 1968 (W) | 20 May 1970 (W) | Ratification |
 Liberia | 1 Jul 1968 (W) | 5 Mar 1970 (W) | Ratification |
 Libya | 18 Jul 1968 (L) 19 Jul 1968 (W) 23 Jul 1968 (M) | 26 May 1975 (L, M, W) | Ratification |
 Liechtenstein | 20 Apr 1978 (L, M, W) | Accession | |
 Lithuania | 23 Sep 1991 (L, W) | Accession | |
 Luxembourg | 14 Aug 1968 (L, M, W) | 2 May 1975 (L, W) 4 May 1975 (M) | Ratification |
 North Macedonia | 30 Mar 1995 (L) 12 Apr 1995 (W) | Succession from SFR Yugoslavia | |
 Madagascar | 22 Aug 1968 (W) | 8 Oct 1970 (W) | Ratification |
 Malawi | 18 Feb 1986 (L) 19 Feb 1986 (W) 4 Mar 1986 (M) | Accession | |
 Malaysia | 1 Jul 1968 (L, M, W) | 5 Mar 1970 (L, M, W) | Ratification |
 Maldives | 11 Sep 1968 (W) | 7 Apr 1970 (W) | Ratification |
 Mali | 14 Jul 1969 (W) 15 Jul 1969 (M) | 10 Feb 1970 (M) 5 Mar 1970 (W) | Ratification |
 Malta | 17 Apr 1969 (W) | 6 Feb 1970 (W) | Ratification |
 Marshall Islands | 30 Jan 1995 (W) | Accession | |
 Mauritania | 26 Oct 1993 (W) | Accession | |
 Mauritius | 1 Jul 1968 (W) | 8 Apr 1969 (W) 14 Apr 1969 (L) 25 Apr 1969 (M) | Ratification |
 Mexico | 26 Jul 1968 (L, M, W) | 21 Jan 1969 (L, M, W) | Ratification |
 Federated States of Micronesia | 14 Apr 1995 (W) | Accession | |
 Moldova | 11 Oct 1994 (W) | Accession | |
 Monaco | 13 Mar 1995 (W) | Accession | |
 Mongolia | 1 Jul 1968 (M) | 14 May 1969 (M) | Ratification |
 Montenegro | 3 Jun 2006 (M) 12 Dec 2006 (L) | Succession from  Serbia and Montenegro | |
 Morocco | 1 Jul 1968 (L, M, W) | 27 Nov 1970 (M) 30 Nov 1970 (L) 16 Dec 1970 (W) | Ratification |
 Mozambique | 4 Sep 1990 (M) 12 Sep 1990 (W) 20 Sep 1990 (L) | Accession | |
 Myanmar | 2 Dec 1992 (W) | Accession | |
 Namibia | 2 Oct 1992 (L) 7 Oct 1992 (W) 9 Oct 1992 (M) | Accession | |
 Nauru | 7 Jun 1982 (L) | Accession | |
 Nepal | 1 Jul 1968 (L, M, W) | 5 Jan 1970 (W) 9 Jan 1970 (M) 3 Feb 1970 (L) | Ratification |
 Netherlands | 20 Aug 1968 (L, M, W) | 2 May 1975 (L, M, W) | Ratification |
 New Zealand | 1 Jul 1968 (L, M, W) | 10 Sep 1969 (L, M, W) | Ratification |
 Nicaragua | 1 Jul 1968 (L, W) | 6 Mar 1973 (W) | Ratification |
 Niger | 9 Oct 1992 (W) | Accession | |
 Nigeria | 1 Jul 1968 (L, M, W) | 27 Sep 1968 (L) 7 Oct 1968 (W) 14 Oct 1968 (M) | Ratification |
 Norway | 1 Jul 1968 (L, M, W) | 5 Feb 1969 (L, M, W) | Ratification |
 Oman | 23 Jan 1997 (W) | Accession | |
 Palau | 14 Apr 1995 (W) | Accession | |
 Palestine | 10 Feb 2015 (M) 12 Feb 2015 (L) | Accession | |
 Panama | 1 Jul 1968 (W) | 13 Jan 1977 (W) | Ratification |
 Papua New Guinea | 13 Jan 1982 (L) 25 Jan 1982 (W) 16 Feb 1982 (M) | Accession | |
 Paraguay | 1 Jul 1968 (W) | 4 Feb 1970 (W) 5 Mar 1970 (L) | Ratification |
 Peru | 1 Jul 1968 (W) | 3 Mar 1970 (W) | Ratification |
 Philippines | 1 Jul 1968 (W) 18 Jul 1968 (M) | 5 Oct 1972 (W) 16 Oct 1972 (L) 20 Oct 1972 (M) | Ratification |
 Poland | 1 Jul 1968 (L, M, W) | 12 Jun 1969 (L, M, W) | Ratification |
 Portugal | 15 Dec 1977 (L, M, W) | Accession | |
 Qatar | 3 Apr 1989 (L) 10 May 1989 (M) 13 Jun 1989 (W) | Accession | |
 South Korea | 1 Jul 1968 (W) | 23 Apr 1975 (W) | Ratification |
 Romania | 1 Jul 1968 (L, M, W) | 4 Feb 1970 (L, M, W) | Ratification |
 Russia† | 1 Jul 1968 (L, M, W) | 5 Mar 1970 (L, M, W) | Ratification as  Soviet Union |
 Rwanda | 20 May 1975 (L, M, W) | Accession | |
 Saint Kitts and Nevis | 22 Mar 1993 (W) | Accession | |
 Saint Lucia | 28 Dec 1979 (L) | Succession from United Kingdom | |
 Saint Vincent and the Grenadines | 6 Nov 1984 (L) | Succession from United Kingdom | |
 Samoa | 17 Mar 1975 (M) 18 Mar 1975 (W) 26 Mar 1975 (L) | Accession | |
 San Marino | 1 Jul 1968 (W) 29 Jul 1968 (L) 21 Nov 1968 (M) | 10 Aug 1970 (L) 20 Aug 1970 (M) 31 Aug 1970 (W) | Ratification |
 Sao Tome and Principe | 20 Jul 1983 (M) | Accession | |
 Saudi Arabia | 3 Oct 1988 (W) | Accession | |
 Senegal | 1 Jul 1968 (M, W) 26 Jul 1968 (L) | 17 Dec 1970 (M) 22 Dec 1970 (W) 15 Jan 1971 (L) | Ratification |
 Serbia | 27 Apr 1992 (M) 5 Sep 2001 (W) 3 Jun 2006 (L) | Succession from SFR Yugoslavia Signed 10 July 1968 (L, M, W) Deposited 4 March 1970 (W), 5 March 1970 (L, M) Succession from Serbia and Montenegro | |
 Seychelles | 12 Mar 1985 (L) 14 Mar 1985 (M) 8 Apr 1985 (W) | Accession | |
 Sierra Leone | 26 Feb 1975 (L, M, W) | Accession | |
 Singapore | 5 Feb 1970 (L, M, W) | 10 Mar 1976 (L, M, W) | Ratification |
 Slovakia | 1 Jan 1993 (M, W) 17 Apr 1993 (L) | Succession from Czechoslovakia Signed 1 July 1968 Deposited 22 July 1969 | |
 Slovenia | 7 Apr 1992 (L) 20 Aug 1992 (W) | Succession from SFR Yugoslavia | |
 Solomon Islands | 17 Jun 1981 (L) | Succession from United Kingdom | |
 Somalia | 1 Jul 1968 (L, M, W) | 5 Mar 1970 (L) 12 Nov 1970 (W) | Ratification |
 South Africa | 10 Jul 1991 (W) | Accession | |
 Spain | 5 Nov 1987 (L, M, W) | Accession | |
 Sri Lanka | 1 Jul 1968 (L, M, W) | 5 Mar 1979 (L, M, W) | Ratification |
 Sudan | 24 Dec 1968 (M) | 31 Oct 1973 (W) 22 Nov 1973 (M) 10 Dec 1973 (L) | Ratification |
 Suriname | 30 Jun 1976 (W) | Succession from Netherlands | |
 Swaziland | 24 Jun 1969 (L) | 11 Dec 1969 (L) 16 Dec 1969 (W) 12 Jan 1970 (M) | Ratification |
 Sweden | 19 Aug 1968 (L, M, W) | 9 Jan 1970 (L, M, W) | Ratification |
 Switzerland | 27 Nov 1969 (L, M, W) | 9 Mar 1977 (L, M, W) | Ratification |
 Syria | 1 Jul 1968 (M) | 24 Sep 1969 (M) | Ratification |
 Tajikistan | 17 Jan 1995 (M) | Accession | |
 Tanzania | 31 May 1991 (L) 7 Jun 1991 (W) 18 Jun 1991 (M) | Accession | |
 Thailand | 7 Dec 1972 (L) | Accession | |
 Timor-Leste | 5 May 2003 (W) | Accession | |
 Togo | 1 Jul 1968 (W) | 27 Feb 1970 (W) | Ratification |
 Tonga | 7 Jul 1971 (L) 15 Jul 1971 (W) 24 Aug 1971 (M) | Succession from United Kingdom | |
 Trinidad and Tobago | 20 Aug 1968 (W) 22 Aug 1968 (L) | 30 Oct 1986 (L, W) | Ratification |
 Tunisia | 1 Jul 1968 (L, M, W) | 26 Feb 1970 (L, M, W) | Ratification |
 Turkey | 28 Jan 1969 (L, M, W) | 17 Apr 1980 (L, M, W) | Ratification |
 Turkmenistan | 29 Sep 1994 (W) | Accession | |
 Tuvalu | 19 Jan 1979 (L) | Succession from United Kingdom | |
 Uganda | 20 Oct 1982 (W) | Accession | |
 Ukraine | 5 Dec 1994 (L, M, W) | Accession | |
 United Arab Emirates | 26 Sep 1995 (W) | Accession | |
| United Kingdom† | 1 Jul 1968 (L, M, W) | 27 Nov 1968 (L, W) 29 Nov 1968 (M) | Ratification |
 United States† | 1 Jul 1968 (L, M, W) | 5 Mar 1970 (L, M, W) | Ratification |
 Uruguay | 1 Jul 1968 (W) | 31 Aug 1970 (W) | Ratification |
 Uzbekistan | 7 May 1992 (M) | Accession | |
 Vanuatu | 24 Aug 1995 (L) | Accession | |
 Venezuela | 1 Jul 1968 (W) | 25 Sep 1975 (L) 26 Sep 1975 (W) 3 Oct 1975 (M) | Ratification |
 Vietnam | 14 Jun 1982 (M) | Accession as the Socialist Republic of Vietnam Signed by the  Republic of Vietnam on 1 July 1968,and ratified on 10 September 1971, 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. | |
 Yemen | 23 Sep 1968 (M) | 14 May 1986 (L) 26 Jan 1989 (M) | Ratification as  North Yemen (L) and  South Yemen (M)prior to Yemeni unification. |
 Zambia | 15 May 1991 (W) 22 May 1991 (L) 5 Jul 1991 (M) | Accession | |
 Zimbabwe | 26 Sep 1991 (L, M) 4 Oct 1991 (W) | Accession |
Partially recognized state abiding by treaty
The Republic of China (Taiwan), which is currently only recognized by 11 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. When the PRC subsequently ratified the treaty, they described the Republic of China's (ROC) ratification as "illegal". The ROC has committed itself to continue to adhere to the requirements of the treaty, and the United States has declared that it still regards the authorities in Taiwan to be bound by the NPT's obligations.
| State | Signed | Deposited | Method |
|---|---|---|---|
 Republic of China | 1 Jul 1968 (W) | 27 Jan 1970 (W) | Ratification |
Withdrawn state
Article X.1 allows a state to leave the treaty if "extraordinary events, related to the subject matter of this Treaty, have jeopardized the supreme interests of its country", giving three months notice. The state is required to give reasons for leaving the NPT in this notice, and to provide this notice to other NPT Parties and to the UN Security Council. This Article does not provide for other states to question a state's interpretation of "supreme interests of its country".
North Korea acceded to the NPT in 1985. On 12 March 1993, after it was found in non-compliance with its safeguards agreement, North Korea gave notice to withdraw from the NPT. However, on 11 June 1993, one day before the withdrawal was to take effect, North Korea reached agreement with the United States to freeze its nuclear program under the Agreed Framework and "suspended" its withdrawal notice. In October 2002, the United States accused North Korea of violating the Agreed Framework by pursuing a secret uranium enrichment program, and suspended shipments of heavy fuel oil under that agreement. In response, North Korea expelled IAEA inspectors, disabled IAEA equipment and, on 10 January 2003, announced that it was ending the suspension of its previous NPT withdrawal notification. There is disagreement among the parties to the treaty whether North Korea's withdrawal was in conformity with the terms of the treaty. North Korea said that only one more day's notice was sufficient for withdrawal from the NPT, as it had given 89 days before. The IAEA Board of Governors rejected this interpretation. Most countries held that a new three-months withdrawal notice was required, and some[who?] questioned whether North Korea's notification met the "extraordinary events" and "supreme interests" requirements of the Treaty.[citation needed] The Joint Statement of 19 September 2005 at the end of the Fourth Round of the Six-Party Talks called for North Korea to "return" to the NPT, implicitly acknowledging that it had withdrawn. As of October, 2016, North Korea has conducted five announced nuclear tests between October 9, 2006, to September 9, 2016.
In 2020, Iran threatened to withdraw from the NPT if it is referred to the United Nations Security Council for alleged breaching the Joint Comprehensive Plan of Action.
| State | Deposited | Method | Withdrew | Effective |
|---|---|---|---|---|
 North Korea | 12 Dec 1985 (M) | Accession | 12 Mar 1993 (M) | Suspended 11 June 1993 |
| 10 Jan 2003 | 10 Apr 2003 |
Other states
Four UN member states have never been a party to the treaty.
![image]()
India![image]()
Israel![image]()
Pakistan![image]()
South Sudan
The Cook Islands and Niue, two associated states of New Zealand which have had their "full treaty-making capacity" recognised by United Nations Secretariat, are not parties to the treaty but consider themselves bound by its provisions by virtue of their administration by New Zealand when the latter ratified the NPT.
See also
- List of parties to the Biological Weapons Convention
- List of parties to the Chemical Weapons Convention
- List of parties to the Convention on Certain Conventional Weapons
- List of parties to the Comprehensive Nuclear-Test-Ban Treaty
- List of parties to the Ottawa Treaty
- List of parties to the Partial Nuclear Test Ban Treaty
- List of parties to the Treaty on the Prohibition of Nuclear Weapons
- List of parties to weapons of mass destruction treaties
References
- "Nuclear Non-Proliferation Treaty (NPT)" (PDF). Defense Treaty Inspection Readiness Program - United States Department of Defense. Defense Treaty Inspection Readiness Program. Archived from the original (PDF) on 2013-03-11. Retrieved 2013-06-19.
- "Democratic People's Republic of Korea: Accession to Treaty on the Non-Proliferation of Nuclear Weapons (NPT)". United Nations Office for Disarmament Affairs. Retrieved 2013-03-01.
- Jean du Preez and William Potter. "North Korea's Withdrawal From the NPT: A Reality Check". James Martin Center for Nonproliferation Studies (CNS) Information & Analysis. Archived from the original on 2010-04-07. Retrieved 2008-07-26.
- "Safeguards Statement for 2011" (PDF). IAEA. Retrieved 6 March 2013.
- "Organs Supplement", Repertory of Practice (PDF), UN, p. 10, archived from the original (PDF) on 2012-04-03
- Avenhaus, Rudolf; Kremenyuk, Viktor; Sjöstedt, Gunnar (2002). Containing the atom. Lexington Books. p. 123. ISBN 9780739103876.
...the Cook Islands and Niue in the South Pacific-and the latter two consider themselves bound by the adherence to the NPT by New Zealand administering these two states when the NPT entered into force.
- "Treaty on the Non-Proliferation of Nuclear Weapons". United Nations Office for Disarmament Affairs. Retrieved 2013-02-28.
- "Treaty on the Non-Proliferation of Nuclear Weapons". Foreign and Commonwealth Office. Archived from the original on 2013-01-04. Retrieved 2013-07-23.
"Treaty on the Non-Proliferation of Nuclear Weapons [London Version]". Foreign and Commonwealth Office. Retrieved 2019-04-27. - "Treaty on the Non-Proliferation of Nuclear Weapons". United States Department of State. 2010-10-06. Retrieved 2019-07-01.
- Договор о нераспространении ядерного оружия (in Russian). Ministry of Foreign Affairs of Russia. Retrieved 2025-04-04.
- "Serbia: Succession to Treaty on the Non-Proliferation of Nuclear Weapons (NPT)". United Nations Office for Disarmament Affairs. Retrieved 2013-03-02.
- "China: Accession to Treaty on the Non-Proliferation of Nuclear Weapons (NPT)". United Nations Office for Disarmament Affairs. Retrieved 2013-03-03.
- "IAEA and DPRK: Chronology of Key Events". International Atomic Energy Agency. 25 July 2014. Retrieved 2017-11-06.
- "Fact Sheet on DPRK Nuclear Safeguards". International Atomic Energy Agency. 2017-11-06. Retrieved 2017-11-06.
- "North Korea Profile – Nuclear Overview". Nti.org. Archived from the original on 2011-09-22. Retrieved 2010-11-25.
- "Media Advisory 2003/48 – IAEA Board of Governors Adopts Resolution on Safeguards in North Korea – 12 February". Iaea.org. 12 February 2003. Retrieved 2010-11-25.
- "A look at North Korea's 6 nuclear tests". USA Today.
- "Iran to quit NPT if its nuclear programme referred to UN: Zarif". Al Jazeera. 2020-01-20. Retrieved 2020-01-20.
- "UNTC". 2017-11-07. Retrieved 2017-11-07.
- Devon Chaffee (2003-04-10). "North Korea's Withdrawal from Nonproliferation Treaty Official". Archived from the original on 2006-04-12. Retrieved 2008-07-26.
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The list of parties to the Nuclear Non Proliferation Treaty encompasses the states which have signed and ratified or acceded to the international agreement limiting the spread of nuclear weapons Participation in the Nuclear Non Proliferation Treaty Recognized nuclear weapon state ratifiers Recognized nuclear weapon state acceders Other ratifiers Other acceders or succeeders Acceder which announced its withdrawal North Korea Unrecognized state abiding by treaty Non signatories Partially recognized state which ratified Republic of China On 1 July 1968 the Nuclear Non Proliferation Treaty NPT was opened for signature The three depositary states were the Soviet Union and later its successor state Russia the United Kingdom the United States states wishing to become a party to the NPT must deposit their instruments of ratification accession or succession with at least one of the depositary governments The treaty came into force and closed for signature on 5 March 1970 with the deposit of ratification of the three depositary states and 40 others Since then states that did not sign the treaty may only accede to it Date NPT first effective including USSR YU CS of that time 1st decade ratified or acceded 1968 1977 2nd decade ratified or acceded 1978 1987 3rd decade ratified or acceded since 1988 Never signed India Israel Pakistan South Sudan The treaty recognizes five states as nuclear weapon states the United States Russia the United Kingdom France and China also the five permanent members of the United Nations Security Council China and France acceded to the treaty in 1992 Four other states are known or believed to possess nuclear weapons India Pakistan and North Korea have openly tested and declared that they possess nuclear weapons while Israel has had a policy of opacity regarding its nuclear weapons program India Israel and Pakistan have never signed the treaty while North Korea was a party to the treaty but announced its withdrawal on 10 January 2003 which became effective ninety days later However there is disagreement among the parties to the treaty whether North Korea s withdrawal was in conformity with the terms of the treaty The NPT remains the most widely subscribed to nuclear arms control treaty in history As of February 2015 190 states are recognized as parties to the treaty excluding North Korea which withdrew The State of Palestine is the most recent state to have joined having submitted its instrument of succession on 10 February 2015 In addition the Republic of China Taiwan which is currently only recognized by 11 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 Taiwan has accepted comprehensive International Atomic Energy Agency IAEA safeguards and the measures of the Additional Protocol to verify that its nuclear program is entirely peaceful Four UN member states have never signed the treaty India Israel Pakistan and South Sudan The Cook Islands and Niue two associated states of New Zealand which have had their full treaty making capacity recognised by United Nations Secretariat are not parties to the treaty but consider themselves bound by its provisions by virtue of their administration by New Zealand when the latter ratified the NPT Ratified or acceded states189 UN member states as well as two observers namely the Holy See and the State of Palestine have become parties to the NPT However one of these states North Korea submitted a notice of withdrawal See the section Withdrawn state below for more details Multiple dates indicate the different days in which states submitted their signature or deposition varied by location This location is noted by L for London M for Moscow and W for Washington D C Bolded states with a dagger are recognized as nuclear weapons states by the treaty State Signed Deposited Method Afghanistan 1 Jul 1968 L M W 4 Feb 1970 W 5 Feb 1970 M 5 Mar 1970 L Ratification Albania 12 Sep 1990 L 14 Sep 1990 M 28 Sep 1990 W Accession Algeria 12 Jan 1995 L M W Accession Andorra 7 Jun 1996 L 25 Jun 1996 W 2 Jul 1996 M Accession Angola 14 Oct 1996 W 30 Apr 2010 M Accession Antigua and Barbuda 17 Jun 1985 L Succession from United Kingdom Argentina 10 Feb 1995 W 17 Feb 1995 L Accession Armenia 21 Jun 1993 M 15 Jul 1993 W Accession Australia 27 Feb 1970 L M W 23 Jan 1973 L M W Ratification Austria 1 Jul 1968 L M W 27 Jun 1969 L W 28 Jun 1969 M Ratification Azerbaijan 22 Sep 1992 M Accession Bahamas 11 Aug 1976 L 13 Aug 1976 W 30 Aug 1976 M Succession from United Kingdom Bahrain 3 Nov 1988 W Accession Bangladesh 31 Aug 1979 L M 27 Sep 1979 W Accession Barbados 1 Jul 1968 W 21 Feb 1980 W Ratification Belarus 9 Feb 1993 M 22 Jul 1993 W 23 Jul 1993 L Accession Belgium 20 Aug 1968 L M W 2 May 1975 L W 4 May 1975 M Ratification Belize 9 Aug 1985 L Succession from United Kingdom Benin 1 Jul 1968 W 31 Oct 1972 W Ratification Bhutan 23 May 1985 W Accession Bolivia 1 Jul 1968 W 26 May 1970 W Ratification Bosnia and Herzegovina 15 Aug 1994 W Succession from SFR Yugoslavia Botswana 1 Jul 1968 W 28 Apr 1969 L Ratification Brazil 18 Sep 1998 L M W Accession Brunei 26 Mar 1985 W Accession Bulgaria 1 Jul 1968 L M W 5 Sep 1969 W 18 Sep 1969 M 3 Nov 1969 L Ratification Burkina Faso 25 Nov 1968 W 11 Aug 1969 M 3 Mar 1970 W Ratification Burundi 19 Mar 1971 M Accession Cabo Verde 24 Oct 1979 M Accession Cambodia 2 Jun 1972 W 25 Sep 1987 M Accession Cameroon 17 Jul 1968 W 18 Jul 1968 M 8 Jan 1969 W Ratification Canada 23 Jul 1968 L W 29 Jul 1968 M 8 Jan 1969 L M W Ratification Central African Republic 25 Oct 1970 W Accession Chad 1 Jul 1968 M 10 Mar 1971 W 11 Mar 1971 M 23 Mar 1971 L Ratification Chile 25 May 1995 W Accession China 9 Mar 1992 L 12 Mar 1992 M 17 Mar 1992 W Accession Colombia 1 Jul 1968 W 8 Apr 1986 W 29 Apr 1986 M 30 Apr 1986 L Ratification Comoros 4 Oct 1995 W Accession Republic of the Congo 26 Jul 1968 M 23 Oct 1978 W Ratification Costa Rica 1 Jul 1968 W 3 Mar 1970 W Ratification Cote d Ivoire 1 Jul 1968 W 6 Mar 1973 W Ratification Croatia 29 Jun 1992 W Succession from SFR Yugoslavia Cuba 4 Nov 2002 M Accession Cyprus 1 Jul 1968 L M W 10 Feb 1970 M 16 Feb 1970 W 5 Mar 1970 L Ratification Czech Republic 1 Jan 1993 M W 5 Apr 1993 L Succession from Czechoslovakia Signed 1 July 1968 Deposited 22 July 1969 Democratic Republic of the Congo 22 Jul 1968 W 17 Sep 1968 L 4 Aug 1970 W Ratification Denmark 1 Jul 1968 L M W 3 Jan 1969 L M W Ratification Djibouti 16 Oct 1996 W Accession Dominica 10 Aug 1984 L Succession from United Kingdom Dominican Republic 1 Jul 1968 W 24 Jul 1971 W Ratification Ecuador 9 Jul 1968 W 7 Mar 1969 W Ratification Egypt 1 Jul 1968 L M 26 Feb 1981 L Ratification El Salvador 1 Jul 1968 W 11 Jul 1972 W Ratification Equatorial Guinea 1 Nov 1984 W Accession Eritrea 16 Mar 1995 W Accession Estonia 7 Jan 1992 L 31 Jan 1992 W Accession Ethiopia 5 Sep 1968 L M W 5 Feb 1970 M 5 Mar 1970 L W Ratification Fiji 21 Jul 1972 W 14 Aug 1972 L 29 Aug 1972 M Succession from United Kingdom Finland 1 Jul 1968 L M W 5 Feb 1969 L M W Ratification France 2 Aug 1992 M 3 Aug 1992 L W Accession Gabon 19 Feb 1974 W Accession Gambia 4 Sep 1968 L 20 Sep 1968 W 24 Sep 1968 M 12 May 1975 W Ratification Georgia 7 Mar 1994 W Accession Germany 28 Nov 1969 L M W 2 May 1975 L W Ratification as West Germany Also East Germany Ratified 31 October 1969 Ghana 1 Jul 1968 M W 24 Jul 1968 L 4 May 1970 L 5 May 1970 W 11 May 1970 M Ratification Greece 1 Jul 1968 M W 11 Mar 1970 W Ratification Grenada 2 Sep 1975 L 3 Dec 1975 W Succession from United Kingdom Guatemala 26 Jul 1968 W 22 Sep 1970 W Ratification Guinea 29 Apr 1985 M Accession Guinea Bissau 20 Aug 1976 M Accession Guyana 19 Oct 1993 W Accession Haiti 1 Jul 1968 W 2 Jun 1970 W Ratification Holy See 25 Feb 1971 L M W Accession Honduras 1 Jul 1968 W 16 May 1973 W Ratification Hungary 1 Jul 1968 L M W 27 May 1969 L M W Ratification Iceland 1 Jul 1968 L M W 18 Jul 1969 L M W Ratification Indonesia 2 Mar 1970 L M W 12 Jul 1979 L M W Ratification Iran 1 Jul 1968 L M W 2 Feb 1970 W 10 Feb 1970 M 5 Mar 1970 L Ratification Iraq 1 Jul 1968 M 29 Oct 1969 M Ratification Ireland 1 Jul 1968 M W 4 Jul 1968 L 1 Jul 1968 W 2 Jul 1968 M 4 Jul 1968 L Ratification Italy 28 Jan 1969 L M W 2 May 1975 L W 4 May 1975 M Ratification Jamaica 14 Apr 1969 L M W 5 Mar 1970 L M W Ratification Japan 3 Feb 1970 L M W 8 Jun 1976 L M W Ratification Jordan 10 Jul 1968 W 11 Feb 1970 W Ratification Kazakhstan 14 Feb 1994 W 21 Mar 1994 L 20 May 1994 M Accession Kenya 1 Jul 1968 W 11 Jun 1970 M Ratification Kiribati 18 Apr 1985 L Succession from United Kingdom Kuwait 15 Aug 1968 M W 22 Aug 1968 L 17 Nov 1989 W Ratification Kyrgyzstan 5 Jul 1994 M Accession Laos 1 Jul 1968 L M W 20 Feb 1970 M 5 Mar 1970 L W Ratification Latvia 31 Jan 1992 L Accession Lebanon 1 Jul 1968 L M W 15 Jul 1970 L M 20 Nov 1970 W Ratification Lesotho 9 Jul 1968 W 20 May 1970 W Ratification Liberia 1 Jul 1968 W 5 Mar 1970 W Ratification Libya 18 Jul 1968 L 19 Jul 1968 W 23 Jul 1968 M 26 May 1975 L M W Ratification Liechtenstein 20 Apr 1978 L M W Accession Lithuania 23 Sep 1991 L W Accession Luxembourg 14 Aug 1968 L M W 2 May 1975 L W 4 May 1975 M Ratification North Macedonia 30 Mar 1995 L 12 Apr 1995 W Succession from SFR Yugoslavia Madagascar 22 Aug 1968 W 8 Oct 1970 W Ratification Malawi 18 Feb 1986 L 19 Feb 1986 W 4 Mar 1986 M Accession Malaysia 1 Jul 1968 L M W 5 Mar 1970 L M W Ratification Maldives 11 Sep 1968 W 7 Apr 1970 W Ratification Mali 14 Jul 1969 W 15 Jul 1969 M 10 Feb 1970 M 5 Mar 1970 W Ratification Malta 17 Apr 1969 W 6 Feb 1970 W Ratification Marshall Islands 30 Jan 1995 W Accession Mauritania 26 Oct 1993 W Accession Mauritius 1 Jul 1968 W 8 Apr 1969 W 14 Apr 1969 L 25 Apr 1969 M Ratification Mexico 26 Jul 1968 L M W 21 Jan 1969 L M W Ratification Federated States of Micronesia 14 Apr 1995 W Accession Moldova 11 Oct 1994 W Accession Monaco 13 Mar 1995 W Accession Mongolia 1 Jul 1968 M 14 May 1969 M Ratification Montenegro 3 Jun 2006 M 12 Dec 2006 L Succession from Serbia and Montenegro Morocco 1 Jul 1968 L M W 27 Nov 1970 M 30 Nov 1970 L 16 Dec 1970 W Ratification Mozambique 4 Sep 1990 M 12 Sep 1990 W 20 Sep 1990 L Accession Myanmar 2 Dec 1992 W Accession Namibia 2 Oct 1992 L 7 Oct 1992 W 9 Oct 1992 M Accession Nauru 7 Jun 1982 L Accession Nepal 1 Jul 1968 L M W 5 Jan 1970 W 9 Jan 1970 M 3 Feb 1970 L Ratification Netherlands 20 Aug 1968 L M W 2 May 1975 L M W Ratification New Zealand 1 Jul 1968 L M W 10 Sep 1969 L M W Ratification Nicaragua 1 Jul 1968 L W 6 Mar 1973 W Ratification Niger 9 Oct 1992 W Accession Nigeria 1 Jul 1968 L M W 27 Sep 1968 L 7 Oct 1968 W 14 Oct 1968 M Ratification Norway 1 Jul 1968 L M W 5 Feb 1969 L M W Ratification Oman 23 Jan 1997 W Accession Palau 14 Apr 1995 W Accession Palestine 10 Feb 2015 M 12 Feb 2015 L Accession Panama 1 Jul 1968 W 13 Jan 1977 W Ratification Papua New Guinea 13 Jan 1982 L 25 Jan 1982 W 16 Feb 1982 M Accession Paraguay 1 Jul 1968 W 4 Feb 1970 W 5 Mar 1970 L Ratification Peru 1 Jul 1968 W 3 Mar 1970 W Ratification Philippines 1 Jul 1968 W 18 Jul 1968 M 5 Oct 1972 W 16 Oct 1972 L 20 Oct 1972 M Ratification Poland 1 Jul 1968 L M W 12 Jun 1969 L M W Ratification Portugal 15 Dec 1977 L M W Accession Qatar 3 Apr 1989 L 10 May 1989 M 13 Jun 1989 W Accession South Korea 1 Jul 1968 W 23 Apr 1975 W Ratification Romania 1 Jul 1968 L M W 4 Feb 1970 L M W Ratification Russia 1 Jul 1968 L M W 5 Mar 1970 L M W Ratification as Soviet Union Rwanda 20 May 1975 L M W Accession Saint Kitts and Nevis 22 Mar 1993 W Accession Saint Lucia 28 Dec 1979 L Succession from United Kingdom Saint Vincent and the Grenadines 6 Nov 1984 L Succession from United Kingdom Samoa 17 Mar 1975 M 18 Mar 1975 W 26 Mar 1975 L Accession San Marino 1 Jul 1968 W 29 Jul 1968 L 21 Nov 1968 M 10 Aug 1970 L 20 Aug 1970 M 31 Aug 1970 W Ratification Sao Tome and Principe 20 Jul 1983 M Accession Saudi Arabia 3 Oct 1988 W Accession Senegal 1 Jul 1968 M W 26 Jul 1968 L 17 Dec 1970 M 22 Dec 1970 W 15 Jan 1971 L Ratification Serbia 27 Apr 1992 M 5 Sep 2001 W 3 Jun 2006 L Succession from SFR Yugoslavia Signed 10 July 1968 L M W Deposited 4 March 1970 W 5 March 1970 L M Succession from Serbia and Montenegro Seychelles 12 Mar 1985 L 14 Mar 1985 M 8 Apr 1985 W Accession Sierra Leone 26 Feb 1975 L M W Accession Singapore 5 Feb 1970 L M W 10 Mar 1976 L M W Ratification Slovakia 1 Jan 1993 M W 17 Apr 1993 L Succession from Czechoslovakia Signed 1 July 1968 Deposited 22 July 1969 Slovenia 7 Apr 1992 L 20 Aug 1992 W Succession from SFR Yugoslavia Solomon Islands 17 Jun 1981 L Succession from United Kingdom Somalia 1 Jul 1968 L M W 5 Mar 1970 L 12 Nov 1970 W Ratification South Africa 10 Jul 1991 W Accession Spain 5 Nov 1987 L M W Accession Sri Lanka 1 Jul 1968 L M W 5 Mar 1979 L M W Ratification Sudan 24 Dec 1968 M 31 Oct 1973 W 22 Nov 1973 M 10 Dec 1973 L Ratification Suriname 30 Jun 1976 W Succession from Netherlands Swaziland 24 Jun 1969 L 11 Dec 1969 L 16 Dec 1969 W 12 Jan 1970 M Ratification Sweden 19 Aug 1968 L M W 9 Jan 1970 L M W Ratification Switzerland 27 Nov 1969 L M W 9 Mar 1977 L M W Ratification Syria 1 Jul 1968 M 24 Sep 1969 M Ratification Tajikistan 17 Jan 1995 M Accession Tanzania 31 May 1991 L 7 Jun 1991 W 18 Jun 1991 M Accession Thailand 7 Dec 1972 L Accession Timor Leste 5 May 2003 W Accession Togo 1 Jul 1968 W 27 Feb 1970 W Ratification Tonga 7 Jul 1971 L 15 Jul 1971 W 24 Aug 1971 M Succession from United Kingdom Trinidad and Tobago 20 Aug 1968 W 22 Aug 1968 L 30 Oct 1986 L W Ratification Tunisia 1 Jul 1968 L M W 26 Feb 1970 L M W Ratification Turkey 28 Jan 1969 L M W 17 Apr 1980 L M W Ratification Turkmenistan 29 Sep 1994 W Accession Tuvalu 19 Jan 1979 L Succession from United Kingdom Uganda 20 Oct 1982 W Accession Ukraine 5 Dec 1994 L M W Accession United Arab Emirates 26 Sep 1995 W Accession United Kingdom 1 Jul 1968 L M W 27 Nov 1968 L W 29 Nov 1968 M Ratification United States 1 Jul 1968 L M W 5 Mar 1970 L M W Ratification Uruguay 1 Jul 1968 W 31 Aug 1970 W Ratification Uzbekistan 7 May 1992 M Accession Vanuatu 24 Aug 1995 L Accession Venezuela 1 Jul 1968 W 25 Sep 1975 L 26 Sep 1975 W 3 Oct 1975 M Ratification Vietnam 14 Jun 1982 M Accession as the Socialist Republic of Vietnam Signed by the Republic of Vietnam on 1 July 1968 and ratified on 10 September 1971 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 Yemen 23 Sep 1968 M 14 May 1986 L 26 Jan 1989 M Ratification as North Yemen L and South Yemen M prior to Yemeni unification Zambia 15 May 1991 W 22 May 1991 L 5 Jul 1991 M Accession Zimbabwe 26 Sep 1991 L M 4 Oct 1991 W AccessionPartially recognized state abiding by treatyThe Republic of China Taiwan which is currently only recognized by 11 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 When the PRC subsequently ratified the treaty they described the Republic of China s ROC ratification as illegal The ROC has committed itself to continue to adhere to the requirements of the treaty and the United States has declared that it still regards the authorities in Taiwan to be bound by the NPT s obligations State Signed Deposited Method Republic of China 1 Jul 1968 W 27 Jan 1970 W RatificationWithdrawn stateArticle X 1 allows a state to leave the treaty if extraordinary events related to the subject matter of this Treaty have jeopardized the supreme interests of its country giving three months notice The state is required to give reasons for leaving the NPT in this notice and to provide this notice to other NPT Parties and to the UN Security Council This Article does not provide for other states to question a state s interpretation of supreme interests of its country North Korea acceded to the NPT in 1985 On 12 March 1993 after it was found in non compliance with its safeguards agreement North Korea gave notice to withdraw from the NPT However on 11 June 1993 one day before the withdrawal was to take effect North Korea reached agreement with the United States to freeze its nuclear program under the Agreed Framework and suspended its withdrawal notice In October 2002 the United States accused North Korea of violating the Agreed Framework by pursuing a secret uranium enrichment program and suspended shipments of heavy fuel oil under that agreement In response North Korea expelled IAEA inspectors disabled IAEA equipment and on 10 January 2003 announced that it was ending the suspension of its previous NPT withdrawal notification There is disagreement among the parties to the treaty whether North Korea s withdrawal was in conformity with the terms of the treaty North Korea said that only one more day s notice was sufficient for withdrawal from the NPT as it had given 89 days before The IAEA Board of Governors rejected this interpretation Most countries held that a new three months withdrawal notice was required and some who questioned whether North Korea s notification met the extraordinary events and supreme interests requirements of the Treaty citation needed The Joint Statement of 19 September 2005 at the end of the Fourth Round of the Six Party Talks called for North Korea to return to the NPT implicitly acknowledging that it had withdrawn As of October 2016 North Korea has conducted five announced nuclear tests between October 9 2006 to September 9 2016 In 2020 Iran threatened to withdraw from the NPT if it is referred to the United Nations Security Council for alleged breaching the Joint Comprehensive Plan of Action State Deposited Method Withdrew Effective North Korea 12 Dec 1985 M Accession 12 Mar 1993 M Suspended 11 June 1993 10 Jan 2003 10 Apr 2003Other statesFour UN member states have never been a party to the treaty India Israel Pakistan South Sudan The Cook Islands and Niue two associated states of New Zealand which have had their full treaty making capacity recognised by United Nations Secretariat are not parties to the treaty but consider themselves bound by its provisions by virtue of their administration by New Zealand when the latter ratified the NPT See alsoList of parties to the Biological Weapons Convention List of parties to the Chemical Weapons Convention List of parties to the Convention on Certain Conventional Weapons List of parties to the Comprehensive Nuclear Test Ban Treaty List of parties to the Ottawa Treaty List of parties to the Partial Nuclear Test Ban Treaty List of parties to the Treaty on the Prohibition of Nuclear Weapons List of parties to weapons of mass destruction treatiesReferences Nuclear Non Proliferation Treaty NPT PDF Defense Treaty Inspection Readiness Program United States Department of Defense Defense Treaty Inspection Readiness Program Archived from the original PDF on 2013 03 11 Retrieved 2013 06 19 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the Non Proliferation of Nuclear Weapons Foreign and Commonwealth Office Archived from the original on 2013 01 04 Retrieved 2013 07 23 Treaty on the Non Proliferation of Nuclear Weapons London Version Foreign and Commonwealth Office Retrieved 2019 04 27 Treaty on the Non Proliferation of Nuclear Weapons United States Department of State 2010 10 06 Retrieved 2019 07 01 Dogovor o nerasprostranenii yadernogo oruzhiya in Russian Ministry of Foreign Affairs of Russia Retrieved 2025 04 04 Serbia Succession to Treaty on the Non Proliferation of Nuclear Weapons NPT United Nations Office for Disarmament Affairs Retrieved 2013 03 02 China Accession to Treaty on the Non Proliferation of Nuclear Weapons NPT United Nations Office for Disarmament Affairs Retrieved 2013 03 03 IAEA and DPRK Chronology of Key Events International Atomic Energy Agency 25 July 2014 Retrieved 2017 11 06 Fact Sheet on DPRK Nuclear Safeguards International Atomic Energy Agency 2017 11 06 Retrieved 2017 11 06 North Korea Profile Nuclear Overview Nti org Archived from the original on 2011 09 22 Retrieved 2010 11 25 Media Advisory 2003 48 IAEA Board of Governors Adopts Resolution on Safeguards in North Korea 12 February Iaea org 12 February 2003 Retrieved 2010 11 25 A look at North Korea s 6 nuclear tests USA Today Iran to quit NPT if its nuclear programme referred to UN Zarif Al Jazeera 2020 01 20 Retrieved 2020 01 20 UNTC 2017 11 07 Retrieved 2017 11 07 Devon Chaffee 2003 04 10 North Korea s Withdrawal from Nonproliferation Treaty Official Archived from the original on 2006 04 12 Retrieved 2008 07 26