Territorial annexation by force, whether takes the form of de facto or de jure, is unlawful. In its 2024 Advisory Opinion on Legal Consequences arising from the Policies and Practices of Israel in the Occupied Palestinian Territory (oPt), including East Jerusalem, the ICJ affirmed that both de facto annexation and du jure annexation of the oPt are equally unlawful. This blogpost discusses Israel’s plan to assert its sovereignty over and annex the oPt and the obligation of third states not to recognize such annexation in the light of the ICJ’s 2024 Advisory Opinion.