In June 1987, Lebanese President Amine Gemayel signed a law declaring the Cairo agreement with the PLO. The law to repeal the agreement was first drafted by Parliament`s spokesman, Hussein el-Husseini, and approved by the Lebanese parliament on 21 May 1987, and then by Prime Minister Salim El Hoss. 15. This agreement remains top secret. It can only be accessed by orders. As part of the agreement, UNRWA`s 16 official camps in Lebanon – home to 300,000 Palestinian refugees – have been removed from the strict jurisdiction of the Lebanese Army`s Second Office and placed under the authority of the Palestinian Command for Armed Fighting.  Although the camps remained under Lebanese sovereignty, the new arrangements meant that after 1969 they became an important popular base of the guerrilla movement.   8. The distribution of command bases along the borders will be reviewed and determined after consultation with the Lebanese General Staff. The agreement also established the right of the Palestinians in Lebanon to “join the Palestinian revolution through armed struggle.”  In addition, it has allowed Palestinians to legally control their refugee camps in Lebanon and launch attacks against Israel from southern Lebanon.  The Cairo Agreement or the Cairo Agreement was an agreement reached on 2 November 1969 during talks between Yasser Arafat and the commander of the Lebanese army, General Emile Bustani.  Egyptian President Gamal Abdel Nasser helped mediate the agreement.  Although the text of the agreement was never published, on 20 April 1970, an unofficial (but probably correct) text appeared in the Lebanese daily An-Nahar.
 The agreement established principles under which the presence and activities of Palestinian guerrillas in southeastern Lebanon would be tolerated and regulated by the Lebanese authorities.   4. Palestinians residing in Lebanon must be allowed to participate in the Palestinian revolution through armed struggle and in accordance with the principles of Lebanon`s sovereignty and security. (1) Palestinians currently in Lebanon have the right to work, stay and travel in Lebanon. 13. It is understood that all Lebanese civilian and military authorities will continue to exercise their authority and fully assume their responsibilities throughout Lebanese territory in all circumstances. Palestinian engagement in Lebanon increased in the early 1970s, particularly after black September in Jordan. Finally, the Lebanese army is no longer able to limit the PLO`s activities.  In April 1975, a civil war broke out in Lebanon between the PLO and the Christians, and a few months later, the Lebanese National Left Movement, on the PLO side, entered the conflict.
 After the military successes of this alliance, the right-wing Maronite President, Suleiman Frangieh, called on Syria to intervene. The PLO then retreated southward, but continued guerrilla operations across the Lebanon-Israel border, leading to the Israeli invasion in March 1978.   The escalation of the conflict eventually led to the Israeli invasion and occupation of Lebanon during the Lebanon War in 1982, provoking the plo`s expulsion from southern Lebanon. Appendix: Cairo Convention (1969) On Monday, November 3, 1969, the Lebanese delegation, led by the army commander, General Emile al-Bustani, and the delegation of the Palestine Liberation Organization, under the leadership of Mr.