United Nations Security Council Resolution 648
Adopted unanimously by the Security Council at its 2906th meeting, on 31 January 1990
The Security Council,
Recalling its resolutions 425 (1978) and 426 (1978) of 19 March 1978, 501 (1982) of 25 February 1982, 508 (1982) of 5 June 1982, 509 (1982) of 6 June 1982 and 520 (1982) of 17 September 1982, as well as all its resolutions on the situation in Lebanon,
Having studied the report of the Secretary-General on the United Nations Interim Force in Lebanon of 25 January 1990,  and taking note of the observations expressed therein,
Taking note of the letter dated 11 January 1990 from the Chargé d’affaires a.i. of the Permanent Mission of Lebanon to the United Nations addressed to the Secretary-General, 
Responding to the request of the Government of Lebanon,
1. Decides to extend the present mandate of the United Nations Interim Force in Lebanon for a further interim period of six months, that ism until 31 July 1990;
2. Reiterates its strong support for the territorial integrity, sovereignty and independence of Lebanon within its internationally recognized boundaries;
3. Re-emphasized the terms of reference and general guidelines of the Force as stated in the report of the Secretary-General of 19 Match 1978,  approved by resolution 426 (1978), and calls upon all parties concerned to co-operate fully with the Force for the full implementation of its mandate;
5. Requests the Secretary-General to continue consultations with the Government of Lebanon and other parties directly concerned with the implementation of the present resolution and to report to the Security Council thereon.
 Ibid., document S/21102.
 Ibid., document S/21074.
 Official Records of the Security Council, Thirty-third Year, Supplement for January, February and March 1978, document S/12611.