United Nations Security Council resolution 1623, adopted unanimously on 13 September 2005, after reaffirming all resolutions on the situation in Afghanistan, particularly resolutions 1386 (2001), 1413 (2002), 1444 (2002), 1510 (2003) and 1563 (2004), and resolutions 1368 (2001) and 1373 (2001) on terrorism, the Council extended the authorisation of the International Security Assistance Force (ISAF) until mid-October 2006.[1]