The TPNW’s adherence rate is on average the same as for other treaties on weapons of mass destruction (WMD). At 25 months, the TPNW had, by a close margin, the second fastest speed of adherence of all the WMD treaties – although significantly slower than for the Treaty on the Non-Proliferation of Nuclear Weapons (NPT).
Just after two years since the TPNW opened for signature, a total of 32 states had adhered to the Treaty. Thirty-one states had signed and ratified as of 1 October 2019, and one state – the Cook Islands – had acceded. To trigger entry into force, the TPNW needs 18 more states to adhere to the Treaty by means of ratification or accession.
The animation shows the rate of adherence (ratification, acceptance, approval or accession) to the TPNW compared to the other treaties on weapons of mass destruction (WMD): the Comprehensive Nuclear-Test-Ban Treaty (CTBT), the Biological Weapons Convention (BWC), the Chemical Weapons Convention (CWC), and the NPT. While the TPNW almost 25 months after opening for signature had 32 adherents, the NPT had 52 adherents after 25 months, the BWC 30, the CWC 20, and the CTBT 21.
This progress is taking place despite the fact that the TPNW is the only treaty in this list whose negotiation and entry into force has been actively opposed by permanent members of the UN Security Council and some of their allies.
On the other hand, the figure below clearly illustrates that the number of states that have signed the TPNW is still low compared to all of the other WMD treaties. Since the first edition of the Ban Monitor in October 2018, though, ten states have signed the TPNW.