U.S. ACTS TO ASSURE ISRAELIS AND ARABS ON CARTER REMARKS
Mar 11: Carter Adm officials, concerned about possible repercussions in Israel and Arab countries, take steps to try to convince both sides that Carter's proposals do not mean end to US even-handedness in negotiations; Israeli sources say that White House natl security adviser Zbigniew Brzezinski telephoned Israeli Embassy official Hanan Baron to stress that Carter had not meant to make public hard and fast 'plan,' but rather to encourage process of negotiating by parties themselves; Sec Vance meets with delegation from Conf of Presidents of Major Amer Jewish Orgns, headed by Rabbi Alexander M Schindler, and tells group that US wants to remain impartial mediator (M)