In 1969, the United States voted with the rest of the Security Council to condemn Israel's annexation of East Jerusalem and plans to build Jewish settlements in East Jerusalem. The Security Council "urgently calls once more upon Israel to rescind forthwith all measure taken by it which may tend to change the status of the City of Jerusalem." And it explicitly mentioned expropriation of land.
Several days earlier, the US ambassador the United Nations had said in a speech to the UN:
The United States considers that the part of Jerusalem that came under the control of Israel in the 1967 war, like all other areas occupied by Israel, is occupied territory and hence subject to the provisions of international law governing the rights and obligations of an occupying Power. Among the provision of international law which bind Israel, as they would bind any occupier, are the provisions that the occupier has no right to make changes in law or in administration other than those which are temporarily necessitated by his security interests, and that an occupier may not confiscate or destroy private property. The pattern of behavior authorized under the Geneva Convention of 12 August 1949 and international law is clear: the occupier must maintain the occupied area as intact and unaltered as possible, without interfering with the customary life of the area, and any changes must be necessitated by the immediate needs of the occupation. I regret to say that the actions by Israel in the occupied portion of Jerusalem present a different picture, one which gives understandable concern that the eventual disposition of East Jerusalem may be prejudiced, and that the private rights and activities of the population are already being affected and altered. (Cited in Separate and Unequal: The Inside Story of Israeli Rule in East Jerusalem, by Amir S. Cheshin, Bil Hutman, and Avi Melamed (Cambridge: Harvard, 1999), pp. 46-7.
I should point out that this statement was made before a single Jewish settlement had been built outside of Jerusalem. The censure was in reaction to Israel construction of Jewish settlements over the Green Line in East Jerusalem – settlements that are now the "neighborhoods" of Ramot Eshkol and Ma'a lot dafna, East Talpiyot and Neveh Ya'akov.
Over the last 43 years, UN ambassadors and consuls have fumed and chastised, but there have been zero consequences for Israel. Now there are close to half a million Jews living over the Green Line, with hundreds of thousands of dunams confiscated and expropriated, and the lives of many Palestinians a living hell, as they see their lands, resources, freedom of movement become increasingly restricted.
And the United States has the sheer chutzpah to say that the question of settlements is a matter of the (non-existent) peace negotiations, and not one of international law.