TPNW Informal Working Group: Article 4 - Nuclear Disarmament Verification

The First Meeting of States Parties established an informal working group on the implementation of Article 4, “in particular work related to the future designation of a competent international authority or authorities.” Article 4 of the TPNW “Towards the elimination of nuclear weapons” outlines the pathways for the elimination of nuclear weapons of nuclear-armed states or states hosting other countries’ nuclear weapons on their territories who wish to join the TPNW.

The Vienna Action Plan includes four actions, Actions 15-18, dedicated to the implementation of Article 4, including discussing in the intersessional period the competent international authority or authorities identified in Article 4 to verify nuclear disarmament and elaborating on requirements for requests to extend the deadlines for nuclear disarmament.


Mexico and New Zealand


6 September 2023
19 April 2023
02 March 2023
1 February 2023 
14 November 2022