Indeed, the UN expected a sort of conjoined two-state arrangement.
The problem with the Declaration of Independence, is that, not only it was signed before getting written, rising the question of whether should the notes, the speech, or the document crafted after the fact to be considered the “official” one… but also Israel still lacks a proper Constitution; it has a set of Basic Laws, the last one of which got approved in 2018, but it’s expected more should follow, so it can still be seen as a “not fully established” state, making stuff up on the go.
Are you also researching as we go
Some of this stuff I’ve double checked, but most had already looked up before. One thing it would be interesting to know more about, are the nuances in the Hebrew text of the Declaration of Independence… but my knowledge of Hebrew barely goes as far as realizing that the English version is not a word for word translation.