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States Parties


Mexico served as a vice-president of the First Meeting of States Parties to the TPNW (1MSP) in Vienna in June 2022. The meeting approved the nomination of the Mexican ambassador Juan Ramón de la Fuente to serve as president of the Second Meeting of States Parties, to be held in New York 27 November ato 1 December 2023.[1]

TPNW Status

20 Sep 2017
16 Jan 2018 (Ratification)
22 Jan 2021
Received 22 Jan 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) 8 (25%)
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 1967, Tlatelolco)
Party to the NPT Yes (Ratified 1969)
Ratified the CTBT Yes (Ratified 1999, Annex 2 state)
Party to the BWC Yes (Ratified 1974)
Party to the CWC Yes (Ratified 1994)
IAEA safeguards and fissile material
Safeguards agreement Yes (14 Sep 1973)
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

Together with New Zealand, Mexico was also appointed by the 1MSP as co-chair of an informal working group responsible for promoting implementation of Article 4 of the TPNW, in particular with respect to the future designation of a competent international authority or authorities to oversee such work.

At the Tenth Review Conference of the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) in August 2022, Mexico described the TPNW as ‘the logical culmination of international law and the conviction of the [UN] General Assembly regarding the intrinsically immoral nature of nuclear weapons’.2 Mexico also delivered a closing statement to the NPT Review Conference on behalf of 65 TPNW-supporting states that urged ‘all states committed to attain and maintain a world without nuclear weapons to join the TPNW without delay’.3

In the First Committee of the UN General Assembly in October 2022, Mexico said that it has ‘proudly promoted and will continue to promote’ the TPNW. It described the Treaty as ‘complementary’ to, ‘fully compatible’ with and ‘mutually reinforcing’ of the NPT, and ‘a tangible expression of the obligations under its Article VI’. It also said that ‘The TPNW gets more and more signatures and ratifications and continues, inexorably, its path towards universality.’4


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

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

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