UN nuclear weapon ban treaty opens for signature

September 20, 2017

More than 50 heads of state, heads of government and foreign ministers are expected to sign the landmark Treaty on the Prohibition of Nuclear Weapons on 20 September 2017 in New York during a high-level ceremony to be held in the margins of the annual opening of the United Nations General Assembly.

With tensions continuing to grow between the United States and North Korea, the risk of the use of nuclear weapons – with all the devastating humanitarian consequences that would entail – is higher than ever. In an address to the General Assembly yesterday, US President Trump said: “If the United States is forced to defend itself, we will have no choice but to totally destroy North Korea.”

In this context, the signing the new treaty – which was formally adopted on 7 July – will be a powerful way for states around the world to take a stand against nuclear weapons and offer the international community a way to rid the world of this inhumane and unacceptable weapon.

“For decades nuclear weapons have remained the only weapons of mass destruction not yet prohibited despite their immense destructive power and threat to humanity, and nuclear-armed states are still threatening to use them to wipe our cities and hundreds of thousands of civilians. Today states that sign the treaty will demonstrate their commitment to a world without nuclear weapons by making them illegal,” said Beatrice Fihn, executive director of ICAN.

The treaty bans the use, threatened use, production, development, stationing, and testing of nuclear weapons; forbids assistance will all prohibited activities, and requires the provision of assistance to victims and remediation of polluted land from nuclear weapon use and testing.

With the adoption of the treaty, nuclear weapons finally join biological and chemical weapons as weapons of mass destruction that have been declared illegal under international law.

More than 50 states are expected to sign the treaty on the opening day, with more states due to sign in the following days of the UN General Assembly. The treaty will enter into force following the 50th ratification.

“This treaty is the beginning of the end for nuclear weapons,” said Setsuko Thurlow, a survivor of the 1945 atomic bombing of Hiroshima. “For those of us who have survived the use of nuclear weapons, this treaty gives us hope,” she continued.

The treaty negotiations were boycotted by nuclear-armed states, who unsuccessfully sought to derail the process. Despite their absence, this treaty is a clear indication that the majority of the world no longer accepts nuclear weapons, and creates a new norm that can be the foundation for their elimination.

As has been true with previous weapon prohibition treaties, including those banning anti-personnel landmines and cluster munitions, a strong new international norm can lead to concrete changes in policies and behaviour, even in states not party to the treaty.



  • aiweiwei

    “Let’s act up! Ban nuclear weapons completely and unconditionally.”

    Ai Weiwei Artist and activist

  • sheen

    “If Gandhi and Martin Luther King Jr were alive today, they would be part of ICAN.”

    Martin Sheen Actor and activist

  • bankimoon

    “I salute ICAN for working with such commitment and creativity.”

    Ban Ki-moon Former UN chief

  • yokoono

    “We can do it together. With your help, our voice will be made still stronger. Imagine peace.”

    Yoko Ono Artist

  • jodywilliams

    “Governments say a nuclear weapons ban is unlikely. Don’t believe it. They said the same about a mine ban treaty.”

    Jody Williams Nobel laureate

  • desmondtutu

    “With your support, we can take ICAN its full distance – all the way to zero nuclear weapons.”

    Desmond Tutu Nobel laureate

  • herbiehancock

    “Because I cannot tolerate these appalling weapons, I whole-heartedly support ICAN.”

    Herbie Hancock Jazz musician

  • dalailama

    “I can imagine a world without nuclear weapons, and I support ICAN.”

    Dalai Lama Nobel laureate