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Switzerland Switzerland


States with nuclear-free security strategies

Switzerland voted in favour of adopting the TPNW at the UN Diplomatic Conference on 7 July 2017, but has not yet adhered to the Treaty. Switzerland maintains policies and practices that are compliant with all of the prohibitions in Article 1 of the TPNW, and can therefore sign and ratify the Treaty without making changes to existing practices or policies.

Latest developments and background

In June 2018, the Swiss Government published an interdepartmental working group (IDAG) report on the implications of accession to the TPNW. “At the current stage”, the report concluded, “the reasons against an accession of Switzerland outweigh the potential opportunities accompanying a signature and ratification of this treaty” ( Both houses of the Swiss Parliament subsequently instructed the government to sign and ratify without delay ( The Swiss Government plans to update the IDAG report and review its decision by the end of 2020, and contends that this fulfils the mandate given by Parliament ( Parliament and NGOs disagree. Bern and Geneva have signed ICAN’s Cities Appeal.


  • Switzerland should urgently sign and ratify the TPNW, and encourage other states to adhere to the Treaty.
Compliance with article 1(1) of the TPNW
Art 1(1)(a) The prohibition on developing, producing, manufacturing, or otherwise acquiring Compliant
The prohibition on testing Compliant
The prohibition on possessing or stockpiling Compliant
Art 1(1)(b) The prohibition on transferring Compliant
Art 1(1)(c) The prohibition on receiving transfer or control Compliant
Art 1(1)(d) The prohibition on using Compliant
The prohibition on threatening to use Compliant
Art 1(1)(e) The prohibition on assisting prohibited activities Compliant
The prohibition on encouraging or inducing prohibited activities Compliant
Art 1(1)(f) The prohibition on encouraging or inducing prohibited activities Compliant
Art 1(1)(g) The prohibition on allowing stationing, installation, or deployment Compliant
TPNW process
Vote on mandate resolution (A/RES/71/258) Abstained
Participated in treaty negotiations (% women) Yes (14%)
Vote on adoption of treaty text Voted yes
Vote on UNGA resolution 2018 Abstained
Fissile material
Highly enriched uranium stocks No
Civilian plutonium stocks
Fissile material production No
Related treaties and mechanisms
Party to the NPT Yes
Party to a NWFZ No
Ratified the CTBT Yes (Annex 2 state)
Party to the PTBT Yes
Member of the CD Yes
IAEA CSA in force Yes
IAEA AP in force Yes
Party to the CWC Yes
Party to the BWC Yes