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Customary International Law in the 21st Century: Old Challenges and New Debates

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This article will survey the new non-traditional scholarship which has emerged in international law to challenge the two long-established sources of customary norms, state practice and opinio juris. With the recent growth, in the international system, of self-contained international criminal tribunals, new challenges facing international law have emerged. Institutionally structured as self-contained legal regimes, international legal tribunals such as the ICTY, ICTR, and now the ICC have nevertheless contributed to a new paradigm within international law. The jurisprudence of these international criminal tribunals, on a wide range of international legal questions, has slowly begun to be elevated into norms of customary international law. Given this fact then, the debate over whether consistent state practice and opinio juris are the only building blocks of customary international law is over, because clearly, for better or for worse, they no longer are. The new question, the new debate, will be over what the implications of this shift in the traditional building blocks of customary international law are, not only on the international system as a whole, but also, surprisingly perhaps, on national (domestic nation state) legal systems as well. The domestic law angle is key, for in the past few years the jurisprudence of these international tribunals has, aside from finding its way into customary international law, also begun to seep into the domestic (mainly criminal) law of several countries.

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... Why does it have to state that it adheres to customary norms? (Baker, 2010). In contrast to the explanatory question as to why the norm arises, this question is normative rather than empirical it demands an investigation on the basis of legal obligation (Priambodo, 2018). ...
... In 2000, the ILA adopted the London Principles Statement that Applied to the Establishment of (General) Customary International Law (with comments) consisting of thirty-three principles (International Law Association, London Conference & Law, 2000). What can be identified in the literature is what distinguishes between "traditional" and "modern" CIL, with the latter relying on inclusive ideas about state practices (thus for example incorporating international organizational resolutions) and a relatively greater emphasis on the elements of opinojuris (Baker, 2010). ...
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This study aims to analyze the traditional law community unit is examined by emphasizing the concept of Tri Hita Karana as a reference for village spatial planning, village buildings, and harmonization with cultural and environmental conservation in Penglipuran village. Based on field surveys, several attractions in Indonesia have not heeded the concepts of Tri Hita Karana, Tri Mandala, and Asta Kosala-Kosali. Sample of this study were the traditional village officers and associations of the Indonesian Hotels and Restaurants Association to test the model of the tourism village that imply the humanist integration of indigenous peoples empowerment. Statistical analysis is based on survey data and records of the amount of environmental damage due to high tourist activity. The results of this study shows that mutual humanist synergy is a collective nature of indigenous peoples and tourism service actors leading to environmentally friendly cultural ecotourism. The steady culture of the survival of traditions, customs, and ancestral culture has an impact on sustainable tourism development. The environmentally unconscious behavior becomes a challenge. Prevention of environmental damage can be overcome by offering a model of the Penglipuran tourism village as a universal model with environmental balance characteristics.
... The referral is an indication of international legal acts in national regulations. Such referrals authorize the direct application of the international rules of law in domestic legal relations (Morten Bergsmo, 2010). ...
... Morten Bergsmo (2010) identified that the most traditional variant of application is the adoption such Laws into National Codes of Crimes under International Law. Second and more alternative approach the process of implementing Law of International Criminal Court, a specific incrimination in domestic law (Schmalenbach Kirsten, 2015). ...
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The present research paper describes the most traditional ways of Implementation of Rome Statute. The main section of the paper concerns the effect of adopting Core crimes in different countries as well as determine key way of such implementation and its practical results. Such description aims to comprehend and compare the practical questions which arise in the prism of implementation of International Crimes, as well as find good practical answers which are based on states’ experience. Most issues, which will be introduced in this article should answer following important questions: first is whether the states have to implement international regulations on genocide crimes, terrorism, war crimes with crimes against humanity, and second question is arisen due to the definition of International Crimes in national laws. At main part of the research, we discuss the national legal background to implement the regulations of Rome Statute, as a part of International law, as well as analyze foreign countries experience in this direction. In this legal research, three categories of methods were used: philosophical methods, general scientific methods and legal methods. All the methods, including dialectic method, method of analysis and synthesis, historical, sociological and comparative, the method of the general theory of scientific knowledge of social and legal phenomena, as well as, method of systematic analysis, comparative legal method, and logically legal method were used to consider the most traditional ways of Application of the Rome Statute in domestic laws together with all the regulations of international law in general.
... International custom is seen as a source of international law since it is believed that if governments behave consistently, they may be doing so because they feel obligated to do so by law, a concept known as opinio juris. A new rule of international law is established if enough governments behave consistently, out of a sense of duty, for an extended amount of time (Baker, 2010). ...
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International law is derived from both treaty law and customary international law. Treaties are formal written agreements among States that establish specific rules. On the other hand, customary international law is not codified in written form but is based on "a general practice accepted as law". It must be shown that a norm is reflected in state practice and that the international community views it as legally binding in order to prove that it is customary. Rules derived from "a general practice accepted as law" make up customary international law, which exists apart from treaty law. Customary international humanitarian law (IHL) is essential in contemporary armed conflicts because it fills in the legal gaps left by treaty law in both international and non-international conflicts and improves the protections provided to victims.
... 73 According to this provision international custom has two elements: State practice (material element) and opnio juris (psychological element). 74 Besides, international custom has been broadly accepted by states as "source of international law". Most states consider international law as part of their national laws. ...
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This study explores the principles of domestic criminal jurisdiction under international law, focusing on universal jurisdiction. It analyzes the contentious nature of universal jurisdiction, particularly its application by international judicial organs post-human rights and international criminal law developments. The research scrutinizes the Rome Statute's provisions, debating whether it implicitly or explicitly endorses universal jurisdiction over non-party state nationals. It also examines the complementarity principle within the Statute, arguing that it safeguards state interests by prioritizing national jurisdiction. The findings affirm universal jurisdiction's recognition under international law and its potential activation under the Rome Statute, while complementarity balances states' interests against the jurisdiction of international courts.
... They are applicable without discrimination. A new state coming into existence has to act in compliance with all existing customary international law norms (Baker, 2010). ...
Article
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... 158 However, international law as articulated by these bodies can be used as a catalyst for change on a domestic level by strengthening international customary law in this area. 159 Intra-military sexual assault victims, in the U.S. and around the globe, can petition international human rights bodies. Specifically, they can request acknowledgement of the failures of their government to properly manage and provide independent oversight of intra-military sexual assault in violation of customary international human rights law. ...
Article
In the past several years in particular, intra-military sexual assault and rape in the U.S. armed forces have been the focus of frequent media attention and intense congressional debate. Despite reforms, the rate of intra-military sexual crimes continues to remain high, as does soldiers’ wariness to report instances of sexual violence to military commanders. These problems and others have invigorated the position taken by some that outside judicial review of intra- military sexual crimes is necessary to provide justice to victims and lower the rate of intra-military sexual assault and rape. This Note argues that one of the primary contributors to intra-military sexual assault and rape is the gendered nature of the military itself. Given the nature of these acts, intra-military sexual assault and rape can be properly qualified as “gender crimes.” This Note also points out that this problem is not unique to the United States, as other militaries around the world struggle with intra-military sexual violence. Due to this widespread occurrence and international human rights laws prohibiting rape and gender-based violence more generally, this Note argues that intra-military sexual assault and rape should be viewed as international gender crimes in violation of international customary law. It is theorized that recognizing intramilitary sexual assault and rape in this manner can bring greater attention to these crimes and help push for independent judicial review of intra-military sexual crimes on the domestic level worldwide.
... The relationship between these two elements is complicated, with diverging views highlighting one over the other, and a discussion of these views goes beyond the scope of this paper. For analyses of these different positions see(Petersen, 2008;Baker 2010).Content courtesy of Springer Nature, terms of use apply. Rights reserved. ...
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New means and methods of war such as remote warfare by drones—the focus of this special issue—challenge international law, as there no longer exists agreement between states regarding the rules regulating the use of force. The existing legal norms are interpreted in widely diverging manners and seemingly put aside if not in the interest of the state in question. Yet, this article argues that, taking a closer look at the state practice of drone strikes beyond the paradigmatic case of the USA, the demise of international legal norms regulating the use of force seems overstated. Instead, the analysis reveals that the international laws addressing the use of force and means and methods of warfare are not as dead as the general discourse asserts, and can still serve to regulate state action.
... " 15 International law traditionally has consisted of treaty law and customary law. 16 Although a state cannot change treaty law, it can attempt to change customary international law through continuing effective control and regular usage of disputed territory and waters. For example, "fishing reinforced by a robust maritime presence on disputed islands and features, also strengthens" the claimant state's aggressive position because "demonstrated usage, occupation, and administration are all relevant to ownership under UNCLOS. ...
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La mas antigua y simple respuesta a la pregunta sobre las fuentes del derecho internacional refiere dos principales: (i) los tratados, y (ii) el DI consuetudinario. Ambas son creadas por los Estados, de forma tal que los Estados se encuentran obligados en la medida de su consentimiento pasado y presente. Esta respuesta técnica revela muy poco sobre cómo se generan, se invocan y aplican estas fuentes. En este artículo analizaremos la costumbre como fuente del DI, focalizando en su invocación como medio de prueba en un conflicto internacional y en las decisiones de la Corte Internacional de Justicia y otros tribunales internacionales en que la determinan. Entendemos que además de las conductas estatales y la convicción de su obligatoriedad (opinio iuris), otros elementos deben ser considerados a fin de establecer o negar la existencia de una costumbre internacional, especialmente cuando la misma es invocada como fundamento de los derechos de la persona humana frente al Estado. Se reitera aquí el conflicto latente entre dos tradiciones: (i) la que prioriza la soberanía estatal y (ii) aquélla que privilegia los derechos humanos. La primera requerirá la aceptación plena de los Estados expresada a través de sus conductas consideradas vinculantes. Aquí el método a utilizar será inductivo. La segunda elaborará sobre las tendencias legislativas modernas, el soft law y la opinio iuris referidas a la obligatoriedad del respeto de un mínimo de derechos como límite a la voluntad soberana estatal. En este caso, el método deductivo será la herramienta a utilizar. Si sólo se repara en los elementos tradicionales de la costumbre internacional establecidos hace siglos por el DI, llegaremos a decisiones judiciales que consolidan el sistema de Estados soberanos, sin importar si las mismas se alejan del ideal de justicia y protección de los derechos humanos, como por ejemplo, lo refleja las sentencias de la CIJ en Orden de Arresto o en Inmunidades Jurisdiccionales del Estado. Para que esto no suceda, intentaremos demostrar que otros medios reveladores de la práctica general y obligatoria han de ser utilizados. Éstos tienen su base en la doctrina de los derechos humanos, complementan el accionar estatal y le fijan límites.
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Introduction This chapter takes up ‘post-modern positivism’ in the context of transnational law. The basic theme I shall develop is that transnational legal phenomena pose a strong challenge to post-modern positivism in that these phenomena problematise the notion of ‘validity’ that is central to positivism and post-modern positivism. I begin by explicating the notion of ‘positivism’. Here I sketch the basic features of the two leading positivist accounts of law, those of HLA Hart and Hans Kelsen. As I explain, despite the differences in their views, both Hart and Kelsen advance the same ‘model’ of a legal order, that is, one that is built from the bottom up. For each, the ‘bottom’ represents a norm that provides the foundation for a legal order. For Kelsen, the Basic Norm (Grundnorm) provides the criteria for legal validity. For Hart, validity is a function of the Rule of Recognition. The Rule of Recognition (Hart) or the Grundnorm (Kelsen) provides the tools necessary to identify legal norms as such. Transnational legal phenomena pose a challenge to this picture insofar as transnational legal phenomena arguably cannot be explained or accounted for within this conception of a legal order.
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For the past 15 years an enormous enterprise of global norm making and related national lawmaking has been underway in many areas of global commerce. This article shows that leading global institutions, such as the World Bank, IMF, and United Nations, are building an international financial architecture with law-including corporate bankruptcy law-as its foundation. Building on research on international institutions and three national cases (China, Indonesia, Korea), the authors propose a new framework for legal change in a global context-the recursivity of law. They argue that the globalization of bankruptcy law has proceeded through three cycles: (1) at the national level through recursive cycles of lawmaking, (2) at the global level through iterative cycles of norm making, and (3) at the nexus of the two. Recursive cycles are driven by driven by four mechanisms-the indeterminacy of law, contradictions, diagnostic struggles, and actor mismatch. Thus the recursivity of law both revives and expands the sociological theory of legal change and offers a basis for an integrated theory of globalization and law.
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"Command responsibility" is an umbrella term used in military and international law to cover a variety of ways in which individuals in positions of leadership may be held accountable. In its broadest sense the term refers to the liability of a military commander for failure properly to discharge his duties. The failure need not necessarily imply insufficient control over the conduct of subordinates: a commander could be punished, for example, because he exposed his troops to undue risk. But in a narrower sense, the term refers to the commander's liability for the criminal conduct of his underlings. This type of liability may in turn be variously structured, and be either civil, disciplinary or criminal in nature. Of late, however, the term is usually reserved to denote a species of this latter type - a species in which not only a military commander, but also a non-military leader, is held criminally liable for the conduct of his subordinates as if he personally had executed the criminal deed. Problems related to this particular species of command responsibility, as it has developed in international law, are the subject-matter of this essay.
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This chapter extends extant theory on organizational response to law by proposing a theory of law as endogenous—that is, as generated within the social realm that it seeks to regulate. As organizations respond to legal ideals by themselves becoming legalized, they shape social understandings of law and of the meaning of compliance. Courts, as actors within the same broad social environments—or organizational fields—as organizations, tend to incorporate ideas about law that have arisen and become institutionalized within these fields. Thus, as law becomes progressively institutionalized in organizational fields, it is simultaneously transformed by the very organizational institutions that it is designed to control.
Legal Ambiguity and Symbolic Structures: Organizational Mediation of Civil Rights Law', 97 American J. Sociology (1992) 1531; Edelman, 'Legality and the Endogeneity of Law
  • See
  • Edelman
See, e.g., Edelman, 'Legal Ambiguity and Symbolic Structures: Organizational Mediation of Civil Rights Law', 97 American J. Sociology (1992) 1531; Edelman, 'Legality and the Endogeneity of Law', in R.A. Kagan, M. Krygier, and K. Winston (eds), Legal And Community: On the Intellectual Legacy of Philip Selznick (2002);
Droit Pénal Général et Procédure Pénal (1964), at 226 ff.; J. Pradel, Manuel de Droit Pénal Général (9th edn, 1994), at 436 ff.; Dupont and Fijnaut
  • E G See
  • G Stefani
  • G Levasseur
See, e.g., G. Stefani and G. Levasseur, Droit Pénal Général et Procédure Pénal (1964), at 226 ff.; J. Pradel, Manuel de Droit Pénal Général (9th edn, 1994), at 436 ff.; Dupont and Fijnaut, 'Criminal Law (Belgium)', in R. Blanpain and M. Colucci (eds), International Encyclopedia of Laws (Criminal Law) (1993) (2008 supp.), at paras 109, 126 (2008);
Criminal Law (Yugoslavia)', in ibid
  • Perić Stojanović
Stojanović, Perić, and Ignjatović, 'Criminal Law (Yugoslavia)', in ibid., at paras 133-134, 150-152 (2008);
109; Stojanović, Perić, and Ignjatović, supra note 113, at para. 137; Card, supra note 113, at sects 3.6, 3.7; Stuart, supra note 113, at 83-84, 89; LaFave, supra note 113
  • Fijnaut Dupont
Dupont and Fijnaut, supra note 113, at para. 109; Stojanović, Perić, and Ignjatović, supra note 113, at para. 137; Card, supra note 113, at sects 3.6, 3.7; Stuart, supra note 113, at 83-84, 89; LaFave, supra note 113, at sect. 3.2(a).
supra note 113, at para. 138; Card, supra note 113, at sect. 3.6; Stuart, supra note 113
  • Perić Stojanović
Stojanović, Perić, and Ignjatović, supra note 113, at para. 138; Card, supra note 113, at sect. 3.6; Stuart, supra note 113, at 83-84;
supra note 113, at sect. 3 .7 ff.; Stuart, supra note 113
  • Card
Card, supra note 113, at sect. 3.7 ff.; Stuart, supra note 113, at 90;
This was the fact pattern in the well-known Miller case in the UK: see R. v. Miller
This was the fact pattern in the well-known Miller case in the UK: see R. v. Miller [1983] AC 161 (HL).
Čelebići), Case No. IT-96-21-T, Trial Chamber Judgment, at para
  • Prosecutor V Delalić
Prosecutor v. Delalić et al. (Čelebići), Case No. IT-96-21-T, Trial Chamber Judgment, at para. 393 (16 Nov. 1998).
See also Prosecutor v. Strugar, Case No. IT-01-42-T
  • Ibid
Ibid. See also Prosecutor v. Strugar, Case No. IT-01-42-T, Trial Chamber Judgment, paras 369-370 (31 Jan. 2005).
at 1144, 1146-1147. See also supra note 77
  • Ibid
Ibid., at 1144, 1146-1147. See also supra note 77.
Prosecuting International Crimes in Belgium', 3 J Int'l Criminal Justice (2005) 400; Baker, 'Universal Jurisdiction and the Case of Belgium: A Critical Assessment
  • E G See
  • Reydams
  • Belgium Reneges On Universality
See, e.g., Reydams, 'Belgium Reneges on Universality: The 5 August 2003 Act on Grave Breaches of International Humanitarian Law', 1 J Int'l Criminal Justice (2003) 679; Vandermeersch, 'Prosecuting International Crimes in Belgium', 3 J Int'l Criminal Justice (2005) 400; Baker, 'Universal Jurisdiction and the Case of Belgium: A Critical Assessment', 16 ILSA J Int'l & Comp L (2009) 1.
/6 on the Appointment and Removal from Offices of International Judges and International Prosecutors
  • Unmik See
  • Reg
See UNMIK Reg. 2000/6 on the Appointment and Removal from Offices of International Judges and International Prosecutors (15 Feb. 2000).
  • Prosecutor V. Latif
  • Gashi
Prosecutor v. Latif Gashi et al. (Llapi), C.C. No. 425/2001 (Dist. Ct. Priština, 16 July 2003), reprinted in T.L.H. McCormack and A. McDonald (eds), Yearbook of International Humanitarian Law: Volume 6 (2003), at 594-601.