Amb. Yehuda Z. Blum served as a Member of Israel Delegation to 3rd UN Conference on the Law of the Sea, New York, 1973, and 31st session of UN General Assembly, New York 1976; he was Ambassador and Permanent Representative of Israel to the United Nations, New York, 1978-84: a member of the Israeli negotiating team on peace treaty with Egypt (Camp David, February 1979; Blair House, March 1979). Member of Israeli legal team, Taba Arbitration (Israel-Egypt), 1986-8. Law Editor of the Encyclopedia Hebraica, 1973-8.