The Joint Commission of the Joint Comprehensive Plan of Action (JCPOA), composed by the E3/EU+3 and Iran, will convene on 10 January in Vienna. The meeting will review the implementation of the agreement and discuss the issues raised in the letter Foreign Minister Zarif addressed on 16 December to the High Representative, Federica Mogherini, as coordinator of the Joint Commission. The Joint Commission will be preceded by a meeting of the sanctions working group.