Cambodia

Nuclear-weapon-free state

Voted in favour of adopting TPNW

Has signed TPNW, but not yet ratified 

Cambodia has signed but not yet ratified the Treaty on the Prohibition of Nuclear Weapons.

Sovann Ke, the permanent representative of Cambodia to the United Nations, signed the treaty on 9 January 2019. The government announced in September 2019 that it is engaged in a process to ratify the treaty. 

Cambodia participated in the negotiation of the treaty at the United Nations in New York in 2017 and voted in favour of its adoption.


In a statement to the United Nations in October 2019, Cambodia hailed the adoption of the treaty as “an important milestone in [the] nuclear disarmament regime”.

Cambodia voted in favour of a UN General Assembly resolution in 2019 that welcomed the adoption of the treaty and 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”.

In its opening statement to the negotiating conference, Cambodia stressed that “the ultimate goal of the instrument is to make it become universalized” so that it achieves “our final objective of a world without nuclear weapons”.

In 2016, Cambodia 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”.

Cambodia was among 127 states that endorsed a “humanitarian pledge” in 2015–16 to cooperate “in efforts to stigmatise, prohibit, and eliminate nuclear weapons”. The pledge was instrumental in building momentum and support for convening the negotiations.

Cambodia is a state party to the 1995 Treaty of Bangkok, which established Southeast Asia as a nuclear-weapon-free zone.

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