Article 15 of the PLO Charter is as effective today as it was in 1968. It has never been renounced, despite their agreement to do so(first time Yasser lied?).
The liberation of Palestine, from an Arab viewpoint, is a national (qawmi) duty and it attempts to repel the Zionist and imperialist aggression against the Arab homeland, and aims at the the liquidation of the Zionist presence (Israel) in Palestine. Absolute responsibility for this falls upon the Arab nation - peoples and governments - with the Arab people of Palestine in the vanguard. Accordingly, the Arab nation must mobilize all its military, human, moral, and spiritual capabilities to participate actively with the Palestinian people in the liberation of Palestine. It must, particularly in the phase of the armed Palestinian revolution, offer and furnish the Palestinian people with all possible help, and material and human support, and make available to them the means and opportunities that will enable them to continue to carry out their leading role in the armed revolution, until they liberate their homeland.
Wrong. From The Palestinian Government:
In 1993, the PLO affirmed that the articles of the Palestinian National Covenant denying Israel's right to exist were invalid and renounced terrorism. In turn, Israel acknowledged the PLO as the official negotiating body for the Palestinians.