evidence: Abyei, the disputed area straddling the Sudan-South Sudan border, remains a major source of tension between the two countries. They still have not agreed on the criteria for voter participation in a referendum to determine whether Abyei joins Sudan or South Sudan. Sudan continues to maintain police around the Diffra oil facility in contravention of resolutions 1990 and 2046. And temporary administrative and security units—including the Abyei Area Executive Council, the Abyei Area Administration and the Abyei Police Service—envisaged by the 20 June 2011 agreement between the parties on "Temporary Arrangements for the Administration and Security of the Abyei Area" and designed to provide stability in the region until its final status can be determined have not been established. [...] The Council last met to discuss UNISFA and the situation in Abyei in consultations on 9 December 2014, with Under-Secretary-General for Peacekeeping Operations Hervé Ladsous briefing. He reported that South Sudan had appointed a co-chair of the Abyei Joint Oversight Committee (AJOC), although the AJOC has not formally reconvened since a Misseriya assailant shot and killed Deng Kuol Deng, the Ngok-Dinka paramount chief, in May 2013. (Initiated in 2011, the AJOC was designed to provide administrative and political oversight of Abyei.) [...] The fundamental issue remains whether and how the Council can compel Sudan and South Sudan to establish temporary administrative and security institutions in Abyei, and over the longer term, to agree on a mutually acceptable process for resolving the final status of the area.