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States Parties


Thailand was one of the states that played a leading role in bringing about the diplomatic process towards a treaty prohibiting nuclear weapons and ensuring the ultimate success of the negotiations in 2017.

20 Sep 2017
20 Sep 2017 (Ratification)
22 Jan 2021
Received 15 Feb 2021
TPNW Article 1(1) prohibitions: Compliance in 2021
(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
2021 UNGA resolution on TPNW
2020 UNGA resolution on TPNW
2019 UNGA resolution on TPNW Voted yes
2018 UNGA resolution on TPNW Voted yes
Participated in TPNW negotiations Yes
Share of women in TPNW negotiations 46%
Vote on adoption of treaty text Voted yes
Adoption of TPNW (7 July 2017) Voted yes
IAEA safeguards and fissile material
Safeguards Agreement Yes
TPNW Art 3(2) deadline N/A
Small Quantities Protocol No
Additional Protocol Yes
Fissile material production facilities No
Highly enriched uranium stocks Cleared
Plutonium stocks (mil/civ) No/No
Related treaties and regimes
Party to the BWC Yes
Party to the CWC Yes
Party to the PTBT Yes
Ratified the CTBT Yes
Party to the NPT Yes
Party to a NWFZ Yes (Bangkok)
Member of the CD No (Observer)

Latest developments

In the First Committee of the 2021 UN General Assembly, Thailand said: '22 January this year marks the historic entry into force of the [TPNW], the first international legal instrument to completely delegitimise nuclear weapons. Now that we have successfully cemented our nuclear disarmament efforts under international law, we should turn our focus towards implementing the text of the Treaty. Thailand wishes to reaffirm its support throughout and beyond the First Meeting of States Parties'.1

Thailand also said: 'Nuclear disarmament is not only a legal obligation, but also a moral and ethical imperative. As such, Member States are sending a clear message that the total elimination of nuclear weapons is the only way to guarantee against their use or threat of use. This is well reflected by the swift entry into force of the TPNW. As we plan for the First Meeting of States Parties in Vienna next spring, we would encourage all Member States, States Parties and non-States Parties alike, to participate at the meeting. Thailand strongly believes that both the TPNW and the NPT are complementary and collectively contribute to the common goal of a world free of nuclear weapons.2

Thailand was one of the co-sponsors of the 2021 UN General Assembly resolution on the TPNW, which called 'upon all States that have not yet done so to sign, ratify, accept, approve or accede to the Treaty at the earliest possible date'.3


  • 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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