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States Parties

Cook Islands

Addressing the First Meeting of States Parties to the TPNW (1MSP) in Vienna in June 2022, the Cook Islands said: ‘For the Cook Islands, sandwiched as we are between two major [nuclear] testing sites in Kiribati and French Polynesia, we have long been aware of the threat of nuclear weapons. Given our very proactive stance on this issue in our region, it took little encouragement for us to become one of the first to accede to this Treaty in 2018.’[1]

TPNW Status

4 Sep 2018 (Accession)
22 Jan 2021
Received 4 Sep 2018
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) N/A
Participated in 1MSP (2022) Yes
1MSP delegation size (% women) 2 (50%)
Adoption of TPNW (7 July 2017) N/A
Participated in TPNW negotiations (2017) N/A
Negotiation mandate (A/RES/71/258) N/A
Other weapons of mass destruction (WMD) treaties
Party to an NWFZ Yes (Ratified 1986, Rarotonga)
Party to the NPT Yes*
Ratified the CTBT Yes (Ratified 2005)
Party to the BWC Yes (Acceded 2008)
Party to the CWC Yes (Ratified 1994)
IAEA safeguards and fissile material
Safeguards agreement Yes (29 Feb 1972)*
TPNW Art 3(2) deadline N/A
Small Quantities Protocol Yes (Original)*
Additional Protocol No
Enrichment facilities/reprocessing plants No
HEU stocks No
Plutonium stocks No

Latest developments

In a closing statement to the Tenth Review Conference of the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) in August 2022, the Cook Islands and 64 other TPNW supporters urged ‘all states committed to attain and maintain a world without nuclear weapons to join the TPNW without delay’.2


  • Cook Islands should continue to encourage other states to adhere to the TPNW.

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

* Through territorial application by New Zealand



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