Expropriation of alien property and the principle of non-discrimination in international law of foreign investment: an overview

The principle of non-discrimination is recognized in international customary practice, as part of general international law, judicial decisions, and treaty law. Furthermore, a great majority of jurists have supported the principle as a yardstick of the legality of various state actions. Thus, no one doubts that in customary international law the principle is now firmly established, this explains the principle's relevance and application in the context of General Assembly Resolution 1803 on Permanent Sovereignty over Natural Resources.