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States Parties

Costa Rica

Speaking at the First Meeting of States Parties to the TPNW (1MSP) in Vienna in June 2022, Costa Rica hailed the Treaty as ‘a triumph of multilateralism and clear evidence of the commitment to collective solutions."[1]

TPNW Status

20 Sep 2017
5 Jul 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) 4 (50%)
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 1969, Tlatelolco)
Party to the NPT Yes (Ratified 1970)
Ratified the CTBT Yes (Ratified 2001)
Party to the BWC Yes (Ratified 1973)
Party to the CWC Yes (Ratified 1996)
IAEA safeguards and fissile material
Safeguards agreement Yes (22 Nov 1979)
TPNW Art 3(2) deadline N/A
Small Quantities Protocol Yes (Modified)
Additional Protocol Yes
Enrichment facilities/reprocessing plants No
HEU stocks No
Plutonium stocks No

Latest developments

In its statement at 1MSP, Costa Rica also said that 'We are at a turning point, where the old models of national security – based on deterrence and threats of certain mutually assured nuclear destruction – have been pointed out as outdated, unjustified and insufficient.'2

At the Tenth Review Conference of the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) in August 2022, Costa Rica said that the TPNW was ‘born from the belief in the capacity of international law to generate significant and substantial change’.3 Costa Rica also delivered a statement on behalf of 145 states on the humanitarian consequences of the use of nuclear weapons.4

During the high-level segment of the UN General Assembly in September 2022, the Minister of Foreign Affairs of Costa Rica, Arnoldo André-Tinoco, urged more states to sign and ratify the TPNW, as well as endorse the declaration and action plan adopted at the 1MSP.5


  • Costa Rica should continue to encourage other states to adhere to the TPNW.

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

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