On 7 October 2013, UN Secretary-General Ban Ki-moon stated that the Joint Mission would eventually have about 100 personnel in Syria, with a support base in Cyprus.[1] In a letter to the Security Council, Ban set out the mission's three phases: establish an initial presence and verify Syria's stockpiles declaration; oversee chemical weapons destruction; and verify destruction of all chemical arms related materials and programs.[1] On 13 October Ban announced that veteran UN diplomat Sigrid Kaag would head the Joint Mission.[2]