International Court Of Justice Advisory Opinion On Israel
In the Court’s view, the fact that an occupation is prolonged does not in itself change its legal status under international humanitarian law. Although premised on the temporary character of the occupation, the law of occupation does not set temporal limits that would, as such, alter the legal status of the occupation. Occupation consists of the exercise by a State of effective control in foreign territory. In order to be permissible, therefore, such exercise of effective control must at all times be consistent with the rules concerning the prohibition of the threat or use of force, including the prohibition of territorial acquisition resulting from the threat or use of force, as well as with the right to self‑determination.