Has not yet joined the TPNW
Tonga has not yet signed or ratified the Treaty on the Prohibition of Nuclear Weapons. It participated in the negotiation of the treaty at the United Nations in New York in 2017 and voted in favour of its adoption.
Tonga has abstained from voting on an annual UN General Assembly resolution that welcomes the adoption of the treaty and calls upon all states to sign, ratify, or accede to it “at the earliest possible date”.
In 2016, Tonga voted in favour of the UN General Assembly resolution that established the formal mandate for states to commence the negotiations in 2017 on “a legally binding instrument to prohibit nuclear weapons, leading towards their total elimination”.
Prior to the adoption of the treaty in 2017, nuclear weapons were the only weapons of mass destruction not subject to a comprehensive, globally applicable treaty prohibition. Tonga supported calls in the UN General Assembly fill this “legal gap”.
Tonga is a state party to the 1985 Treaty of Rarotonga, which established the South Pacific as a nuclear-weapon-free zone.
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