The Treaty on the Prohibition of Nuclear Weapons calls for meetings of states parties to be held on a biennial basis and review conferences at six-year intervals to “consider and, where necessary, take decisions in respect of any matter with regard to the application or implementation of this Treaty, in accordance with its relevant provisions, and on further measures for nuclear disarmament, including:

(a) The implementation and status of this Treaty;
(b) Measures for the verified, time-bound and irreversible elimination of nuclear-weapon programmes, including additional protocols to this Treaty;
(c) Any other matters pursuant to and consistent with the provisions of this Treaty.

First Meeting of States Parties

The first Meeting of States Parties was held in Vienna from 21-13 June 2022 with the participation of 49 States Parties, 34 observer States, and representatives of the United Nations, international and regional organisations, the International Committee of the Red Cross and civil society. The meeting adopted a series of ambitious decisions, including the Vienna Declaration and Plan of Action. Read more about 1MSP.

Second Meeting of States Parties

The Second Meeting of States Parties will take place the week of 27 November - 1 December 2023 at United Nations Headquarters in New York, with Mexico serving as President. Read more about 2MSP.

Intersessional process

At the First Meeting of States Parties to the Treaty on the Prohibition of Nuclear Weapons, states-parties adopted the Vienna Action Plan, with 50 concrete and progressive actions to implement the treaty and work towards a world free of nuclear weapons. Learn more about the work underway in the intersessional process here.

Civil Society information for participation in MSPs

ICAN serves as the Civil Society Coordinator and will provide representatives of relevant non-governmental organisations with information about Meetings of States Parties, registration process and other information. Sign up below to receive updates from ICAN. (If you are an ICAN partner or already registered for 1MSP there is no need to register again.)