Hierarchy is one of the important topics in contemporary international law, because it reveals the structure of law and the international community and its basic values, and it also contributes to clarifying which sources and rules apply to the conflict brought before the courts or in international relations when dealing in general between states.
The implementation of the principle of hierarchism requires many constants, with specific context and concept variables to reach a satisfactory and reasonable result, and this is where the difficulty is applied to international law, because the latter has a flexible and relative nature in comparison with domestic law, and this necessitated starting in the first part by clarifying the origins of the Hierarchal principle to know how Its formation and what developments have accompanied it over time; Starting with the ancient civilization of Iraq; being the oldest civilization of mankind; Passing through Roman civilizations and Abrahamic laws in the first chapter, then forward in the second chapter to define the concept of legal Hierarchy in modern and contemporary law, by reviewing its foundations on which it was based, and the most important basis is the emergence of the modern constitutional state, and in particular some of the principles that became the backbone of it, such as the principle of supremacy The constitution, the principle of separation of powers and the principle of legitimacy. Which the development in the forms of political systems and systems of government has showed another principles emerging as a result of different practices, which are the principle of the Hierarchy of the main authorities in the state, and the bureaucratic hierarchy in government and administration institutions.
When we trying to develop a legal definition of the principle of hierarchism in internal law, we found that jurisprudence has developed greatly in monitoring the various concepts surrounding the aspects of the principle of hierarchism, and one of the most important theories in contemporary law was formed, which it is the pure theory of law, famous known by the theory of the Hierarchy of legal rules, led by the Austrian philosopher Hans Kelsen, Which caused a great conceptual and information revolution, and jurists started between supporters and opponents to discuss its foundations and principles, and this led to the emergence of another theory by several jurists, led by French jurists such as Carr de Malberg, Michel Trooper, and Joseph Sieys. A theory of the Hierarchy of legal acts that examines the contrast between the Hierarchies of Legal rules and the authorities in the state and the bureaucratic hierarchy in its institutions, and after reviewing and analyzing all of the above, we came to the conclusion that there are two general standards that can be used in the detection of Hierarchy, namely the formal standard and the objective standard.
After completing the clarification of the origins of the principle and its method of formation and crystallization in the first part, we proceeded to the second part to apply the concept of hierarchism in general international law, and it is not surprising that the application differs significantly from the internal law, and we began in the first chapter by reviewing and analyzing the different theories that justified the existence of a hierarchism in the public international law, and how to apply it in light of a highly decentralized and multi-legislator system, and the absence of a comprehensive judicial system binding on all states in the international community. We found theories that establish the formal Hierarchy, which is the second part of Kelsen's theory, which explains Hierarchy at the international level, and constitutional theories of international law that focus on Highlighting the existence of a constitution in international law according to certain concepts, such as the fundamental rules that show how international law was established, and the concept of the international public order consisting of peremptory rules, and then we moved to the theories that establish the existence of an objective hierarchy concerned with the essence and quality of the rules and the basic values they contain representing the main goal of Contemporary international law, which has transformed from a law of coexistence into a law of organization and coordination for the purpose of establishing common values and foundations among all states in society. These theories were represented by the theory of the British philosopher Herbert Hart in law, in which he explained his concept of the legal system in general and sees that it is the result of a union of what he called the primary rules and secondary rules, while the primary rules impose certain duties, the secondary rules give certain powers in order to apply the first, and then We reviewed one of the emerging modern theories, which is the relativistic normative theory, which focuses on the essence of law significantly, and which indicated the existence of a value hierarchy in international law, whereby the most fundamental values occupy the top of the pyramid and then progressively descend, and it can be said that they all led to the same downstream, but from points of Multiple view.
Then, in the second chapter, we set out to apply what we have reached in terms of Hierarchy to the sources of public international law, by fixing the concept of sources in the philosophy and theory of public international law, then on the Hierarchy between the various types of customs and treaties, and we came to the supremacy of the general custom as it is the most applicable, as it applies towards All states in the international community, followed by general treaties, regional custom, special treaties, then bilateral custom and bilateral treaties, and one of the results of this Hierarchy is that it is not possible to change, amend or abrogation one of the sources except by applying a rule of parallel forms, that is, if the sources are equal or that one of them is higher in Hierarchy.
After that, we reached the practical field of Hierarchy, which is the Hierarchy between the rules, and we have found rules that are distinguished by their superiority, and nullity is the penalty for violating them, which are peremptory rules, which consist of Jus Cogens, which are objective rules, and obligations Erga omnes, which are the procedural rules that ensure the implementation of Jus Cogens and repel flagrant violations of them with cooperation of the international community as a whole, then we moved to a set of Jus Dispositivum rules of necessary precedence that surpasses other Jus Dispositivum rules, which are the rules of the United Nations Charter in accordance with Article 103 of the Charter, and the rules that may not be reserved, then we reviewed some of the means that states use to derogate from the rules The general international law, which is the persistent objection and the permissible reservation, and then we moved to study the consequences of the existence of the Hierarchy between the rules, which is the invalidity of the rules contrary to the peremptory norms, and the priority of enforcing obligations Erga omnes regarding gross violations of peremptory norms, and the exclusion of conflicting rules or their integration, and we found that contemporary international law is concerned with By implementing the principle of integration of rules and limiting the exclusionary effects of other principles and rules, that is because the absence of the superior authority to states in the international community, and to enable international law to applicable towards all states in the international community at the same level.