Protection against arbitrary or discriminatory measures is a clause for the protection of foreign investments that is included in international investment agreements. The clause imposes an obligation on the state where the investment is made not to harm foreign investments by arbitrary or discriminatory measures. Although it is sometimes overshadowed by other investment protection standards in international investment arbitration, it is actually an independent standard that is frequently regulated in investment agreements. In this article, firstly, the drafting of the protection against arbitrary or discriminatory measures in international investment agreements, its elements and its historical development are discussed. After that, the meaning and scope of the concepts of "arbitrariness" and "discrimination", which are two elements, were examined.
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