The only precondition Israel wants is no precondition. After all it is the Palestinians that are whining about, Jerusalem, 2 years deadlines, settlement freezes, letters from the U.S. with guarantees, etc., so it seems the Pals are ones wanting preconditions. Cj writes:"Acquisition of territory by war is illegal." No it isn't, in fact the authors of Res. 242 expressly stated that they expected Israel to retain some of the land conquered in the 67 war. That did not want the UN to impose any agreement but wanted the parties involved to negotiate the land swap. The author's fully expected Israel to retain some of the land for security. So the myth of "Acquisition of territory by war is illegal" based on 242 is just that, a myth. It is not what the authors of that resolution intended the record is clear on that point. After all if they(authors of 242) expected Israel to retain some of the land it is impossible to say it's illegal.
from the article: Barak to Ban: Push Abbas to renew peace talks