The Security Council,
1. Approves the report of the Secretary-General on the implementation of Security Council resolution 425 (1978), contained in document S/12611 of 19 March 1978,
2. Decides that the United Nations Interim Force in Lebanon shall be established in accordance with the above-mentioned report for an initial period of six months, and that it shall continue in operation thereafter if required, provided the Security Council so decides.