The Joint Statement's abstract:

"We do not accept the argument that Iran is entitled to reduce compliance with the JCPoA. Contrary to its statements, Iran has never triggered the JCPoA Dispute Resolution Mechanism and has no legal grounds to cease implementing the provisions of the agreement.

We publicly stated our concerns, along with the High Representative of the European Union, on 11 November. At the Joint Commission on 6 December, we made clear to Iran that unless it reversed course, we would have no choice but to take action within the framework of the JCPoA, including through the Dispute Resolution Mechanism.

Instead of reversing course, Iran has chosen to further reduce compliance with the JCPoA and announced on 5 January that "the Islamic Republic of Iran, in the fifth step in reducing its commitments, discards the last key component of its limitations in the JCPOA, which is the 'limit on the number of centrifuges'", and that "the Islamic Republic of Iran's nuclear program no longer faces any operational restrictions", including on enrichment and enrichment-related matters.

We have therefore been left with no choice, given Iran's actions, but to register today our concerns that Iran is not meeting its commitments under the JCPoA and to refer this matter to the Joint Commission under the Dispute Resolution Mechanism, as set out in paragraph 36 of the JCPoA.

We do this in good faith with the overarching objective of preserving the JCPoA and in the sincere hope of finding a way forward to resolve the impasse through constructive diplomatic dialogue, while preserving the agreement and remaining within its framework. In doing so, our three countries are not joining a campaign to implement maximum pressure against Iran. Our hope is to bring Iran back into full compliance with its commitments under the JCPoA."