United Nations Security Council Resolution 2231

United Nations Security Council Resolution 2231 was on the nuclear program of Iran, setting out a strict watching process and schedule for performance, while paving the plan for the lifting of United Nations restrictions against Iran. Without exception, the 15-nation body endorsed the Joint Comprehensive Plan of Action autographed in Vienna by the five unchanging representatives of the Council, added to Germany, the European Union and Iran.

After the resolution, Iranian Foreign Affairs minister said: ″The Iranian nation should feel fundamental changes in accordance with the UN Security Council Resolution 2231″

On March 29, 2016, the United States, the UK, France, and Germany wrote a joint letter to Secretary-General of the United Nations Ban Ki-moon accusing Iran of "defying" Security Council Resolution 2231 through missile tests conducted since the deal. The letter said the missiles were "inherently capable of delivering nuclear weapons". However, it stopped short of saying the tests were illegal. Resolution 2231 calls for Iran to refrain from activity related to nuclear-capable missiles ("Iran is called upon not to undertake any activity related to ballistic missiles designed to be capable of delivering nuclear weapons, including launches using such ballistic missile technology"), but according to diplomats the language is not legally binding and cannot be enforced with punitive measures.