The presence of the principle of proportionality in separate branches of international law indicates that it affects its fundamental, ideological foundations and is related to international law as a whole. At the same time, despite the importance that the principle of proportionality has in international law, disputes regarding its content, the essence of the role of proportionality in theory and practice are still the subject of discussions. The article is devoted to the analysis of the practical application of the principle of proportionality in international law.
 In the course of the conducted analysis, it was established that the principle of proportionality in international law manifests itself in various forms and contexts. At a time when it plays a decisive role in the protection of human rights, in certain areas of international law the principle does not have clear boundaries, and the possibility of applying the three-stage verification causes reasoned discussions. Like the principle of justice, the principle of proportionality does not involve the mechanical application of norms and rules, but is primarily aimed at achieving reasonable and fair results in each individual case.
 It was established that the use of the principle of proportionality makes it impossible to refer to precedent judicial practice, since the result of its use depends on the specific context, existing circumstances and established factors. Basically, discussions about the application of the principle of proportionality revolve around spheres, the subjects of which disputes are not regulated by special agreements. This makes a uniform and simplified application of the principle of proportionality impossible, without canceling the need for its application. The above causes a general scientific interest in the peculiarities of the implementation of the principle in practice, namely: analysis of sanctions policy and reprisals in response to violations of international law; assessments of the role of proportionality in maritime disputes and disputes related to trade relations within the framework of the World Trade Organization, as well as bilateral protection of international investments; features of the application of the principle by arbitration courts and tribunals during the analysis of the actual circumstances of cases, etc.
 Despite the fact that the principle of proportionality has significant potential, its main drawback remains the dependence on the evaluation judgments of the subjects who apply it in practice. A significant flaw in the implementation of the principle of proportionality lies in the definition of the independence and independence of international judicial and other bodies in international law, their material, financial and other dependence on different states (for example, on the position of the countries in which the headquarters of these structures are located); dependence of judges and arbitrators on the countries in which they live or whose citizens they are, etc.
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