Skip to main content

The status of the TPNW

As of 12 January 2021, the TPNW has 51 states parties while a further 37 states have signed but not yet ratified. Thus, in total, 88 states (or 44.7% of all states) are either states parties or signatories to the Treaty. This means that we are approaching a situation where half of all states will have accepted binding obligations in international law under the TPNW.

Criteria for TPNW support

Number Category Criterion
1 States parties States that have either signed and ratified or have acceded to the TPNW.
2 Signatories States that have signed the TPNW but not yet ratified it.
3 Other supporters States that are not in category 1 or 2 but whose most recent vote in the UN on the TPNW (on the adoption of the Treaty on 7 July 2017 or on the subsequent annual UN General Assembly resolutions on the TPNW) was 'yes'.
4 Undecided All states that are not in category 1 or 2 and whose most recent vote in the UN on the TPNW (on the adoption of the Treaty on 7 July 2017 or on the subsequent annual UN General Assembly resolutions on the TPNW) was an abstention, or that never participated in such a vote.
5 Opposed All states that are not in category 1 or 2 and whose most recent vote in the UN on the TPNW (on the adoption of the Treaty on 7 July 2017 or on the subsequent annual UN General Assembly resolutions on the TPNW) was 'no'
The states bringing the TPNW into force
What did the adopting states do?


Level of signatures

In the course of 2020, the following six states signed the TPNW: Belize, Malta, Mozambique, Niger, Sudan, Zimbabwe. As shown by the chart on the right, the number of states that have signed the TPNW was still low compared to all of the other WMD treaties at 39 months after opening for signature.

According to ICAN, which works directly with states on their plans for signature and ratification of and accession to the TPNW, the COVID-19 pandemic has certainly caused delays in adherence in some states. Indeed, for a few months, signature of the Treaty was not possible due to COVID-19 restrictions at UN Headquarters. Consideration of the Treaty by cabinets of ministers and by legislatures has, in many cases, been put on hold while the impacts of the pandemic are addressed. Many parliaments have been meeting virtually, and in some cases only for the purpose of addressing the pandemic.

Note that under Article IX(1) of the NPT, signature of the treaty was only possible until its entry into force. The same applies to the BWC (Article XIV(1)), the CWC (Article XVIII), and the CTBT (Article XI). The CTBT of course is not yet in force so signature continues to be possible. The TPNW can be signed also after entry into force.

Fig 10 Status of WMD treaties 25 months after logo

TPNW support by region

Fig 3 Support by region logo
Back to start
Back to start
Back to start
Back to start
Back to start