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.