The TPNW’s adherence rate is on average the same as for other treaties on weapons of mass destruction (WMD). On 1 February 2020 - almost 29 months after it opened for signature on 20 September 2017 - 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).
On 1 February 2020, a total of 35 states had adhered to the Treaty. Thirty-four states had signed and ratified, and one state – the Cook Islands – had acceded. To trigger entry into force, the TPNW needs 15 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 29 months after opening for signature had 35 adherents, the NPT had 60 adherents after 29 months, the BWC 31, the CWC 29, and the CTBT 29.
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.