The agreement signed between Israel and the PLO on Sept. 4th, 1999 was different in one significant way from the Oslo accords that were reached in August, 1993 and the Wye Accords that were reached in October, 1998.
The element that was missing was that there was no call and no requirement for the Palestinian Authority to cease its incitment to war against the state and people of Israel.
The new curriculum of the Palestinian Authority, which indeed inculcates a new generation of Palestinian Arabs for war with Israel and for liberation of all of Palestine, is described on the website of the Center for Monitoring the Impact of Peace, at www.edume.org.
The legal advisor to the office of the Israeli Prime Minister mentions that the call for the PLO to cease incitment is implicit in all agreements between Israel and the PLO.
The question remains: why was it not explicit?
*The Sharm el-Sheikh Memorandum on Implementation Timeline of Outstanding Commitments of Agreements Signed and the Resumption of Permanent Status Negotiations Official Text – http://www.mfa.gov.il/mfa/go.asp?MFAH0fo30.