The resolution authorised the withdrawal of UNMIS from July 11, 2011, further calling on the Secretary-General Ban Ki-moon to complete the withdrawal of all UNMIS personnel by August 31, 2011.[3] All staff and equipment would be transferred from UNMIS to the United Nations Interim Security Force for Abyei (UNISFA) and United Nations Mission in the Republic of South Sudan (UNMISS) in a "smooth transition".[4]