Pretty sure the answer is "United Nations"[1] with further changes happening after 1967's Six Day War[2].
[1] https://en.wikipedia.org/wiki/United_Nations_Partition_Plan_...
[1] https://en.wikipedia.org/wiki/United_Nations_Partition_Plan_...
W.r.t. [2], that wasn't the "United Nations"; it's Isreal and the neighboring Arab states. Most importantly not "Palestinians"; the Arab states ran over Palestinians and failed to run over Isreal resulting in only Isreal having a tenable country.