Expresses serious concern at the deteriorating humanitarian situation in Darfur, and at the threats to and attacks on humanitarian personnel and facilities; expresses concern that access to some conflict areas where vulnerable populations reside remains restricted and that some conflict areas are inaccessible, including in North and Central Darfur and eastern Jebel Marra, due to insecurity, acts of criminality and movement restrictions by Government forces, armed movements and militia groups; welcomes that humanitarian organizations are able to deliver some aid to most people in need of assistance in Darfur; deplores the continued restrictions on humanitarian access in Darfur resulting from increased insecurity, attacks against humanitarian workers, denial of access by the parties to the conflict and bureaucratic impediments imposed by the Government of Sudan; further expresses concern over the insufficient availability of funding for humanitarian actors; stresses the need for the timely issuance of visas and travel permits for humanitarian organizations; and demands that the Government of Sudan, all militias, armed groups and all other stakeholders ensure the safe, timely and unhindered access of humanitarian organizations and relief personnel, and the delivery of humanitarian assistance to populations in need, in accordance with the relevant provisions of international law and United Nations guiding principles of humanitarian assistance, including humanity, impartiality, neutrality and independence;