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States Parties


Thailand served as a vice-president of the First Meeting of States Parties to the TPNW (1MSP) in Vienna in June 2022. It urged states to work together to ‘cement the Treaty’s status as a universal legally binding norm against the existence of nuclear weapons’.[1]

TPNW Status

20 Sep 2017
20 Sep 2017 (Ratification)
22 Jan 2021
Received 15 Feb 2021
TPNW Article 1(1) prohibitions: Compliance in 2022
(a) Develop, produce, manufacture, acquire Compliant
Test Compliant
Possess or stockpile Compliant
(b) Transfer Compliant
(c) Receive transfer or control Compliant
(d) Use Compliant
Threaten to use Compliant
(e) Assist, encourage or induce Compliant
(f) Seek or receive assistance Compliant
(g) Allow stationing, installation, deployment Compliant
TPNW voting and participation
UNGA resolution on TPNW (latest vote) Voted yes (2023)
Participated in 1MSP (2022) Yes
1MSP delegation size (% women) 9 (67%)
Adoption of TPNW (7 July 2017) Voted yes
Participated in TPNW negotiations (2017) Yes
Negotiation mandate (A/RES/71/258) Voted yes
Other weapons of mass destruction (WMD) treaties
Party to an NWFZ Yes (Ratified 1997, Bangkok)
Party to the NPT Yes (Acceded 1972)
Ratified the CTBT Yes (Ratified 2018)
Party to the BWC Yes (Ratified 1975)
Party to the CWC Yes (Ratified 2002)
IAEA safeguards and fissile material
Safeguards agreement Yes (16 May 1974)
TPNW Art 3(2) deadline N/A
Small Quantities Protocol No
Additional Protocol Yes
Enrichment facilities/reprocessing plants No
HEU stocks Cleared
Plutonium stocks No

Latest developments

The 1MSP appointed Thailand and Ireland as informal facilitators to further explore and articulate the possible areas of tangible cooperation between the TPNW and the Treaty on the Non-Proliferation of Nuclear Weapons (NPT), and other relevant nuclear disarmament and non-proliferation instruments. They will submit recommendations for distribution through a Coordination Committee, and report to the Second Meeting of States Parties.2

At the Tenth Review Conference of the NPT in August 2022, Thailand said that the successful conclusion of the 1MSP reaffirmed ‘the compatibility and complementarity of the TPNW to the NPT, notably Article VI’.3

Marking the International Day for the Total Elimination of Nuclear Weapons on 26 September 2022, Thailand welcomed the entry into force of the TPNW and the successful adoption of the declaration and action plan at 1MSP as ‘important developments’ in the field of nuclear disarmament.4

In the First Committee of the UN General Assembly in October 2022, Thailand said that it is working systematically with others to advance the goal of a nuclear-weapon-free world, ‘including through promotion of the TPNW, its universalisation and its complementarity with the NPT and other relevant frameworks’.5 It described ‘the recent positive developments’ under the framework of the TPNW as ‘encouraging’.6

Thailand was one of the co-sponsors for the 2022 UN General Assembly resolution on the TPNW.7


  • Thailand should continue to encourage other states to adhere to the TPNW.

  • Thailand should ensure that all the TPNW obligations are implemented domestically, through legal, administrative, and other necessary measures.

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