Sao Tome & Principe
Nuclear-weapon free state
Participated in TPNW negotiations
Has signed TPNW, but not yet ratified
São Tomé and Príncipe has signed but not yet ratified the Treaty on the Prohibition of Nuclear Weapons.
Urbino José Gonçalves Botelho, the then-minister for foreign affairs of São Tomé and Príncipe, signed the treaty on 20 September 2017.
São Tomé and Príncipe participated in the negotiation of the treaty at the United Nations in New York in 2017 and voted in favour of its adoption.
São Tomé and Príncipe 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 2016, São Tomé and Príncipe was absent for the vote on 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”.
São Tomé and Príncipe 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.
São Tomé and Príncipe is a signatory to the 1996 Treaty of Pelindaba, which established Africa as a nuclear-weapon-free zone.
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