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Sources of international law

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International law also known as "law of nations" is the name of a body of rules which regulate the conduct of sovereign states in their relations with one another. Sources of international law include treaties, international customs, general widely recognized principles of law, the decisions of national and lower courts, and scholarly writings. They are the materials and processes out of which the rules and principles regulating the international community are developed. They have been influenced by a range of political and legal theories.

Contents

Article 38(1) of the Statute of the International Court of Justice is generally recognized as a definitive statement of the sources of international law. It requires the Court to apply, among other things, (a) international conventions, whether general or particular, establishing rules expressly recognized by the contesting states; (b) international custom, as evidence of a general practice accepted as law; (c) the general principles of law recognized by civilized nations; (d) subject to the provisions of Article 59, judicial decisions and the teachings of the most highly qualified publicists of the various nations, as subsidiary means for the determination of rules of law.[1]

During the 19th century, it was recognized by legal positivists that a sovereign could limit its authority to act by consenting to an agreement according to the principle pacta sunt servanda. This consensual view of international law was reflected in the 1920 Statute of the Permanent Court of International Justice, and was later preserved in Article 38(1) of the 1946 Statute of the International Court of Justice.

The core of broad principles of law is general and dynamic, and they can sometimes be reduced to a proverb or a basic idea. Unlike other types of regulations, such as ordered law or agreements, broad standards of law have not been "established" according to the right sources of law. General norms of law, on the other hand, are regarded as a component of positive law, even if they are only used as auxiliary devices. They define critical principles for the framework's actual operation and, in general, are drafted from the lawful thinking of those entitled to make valid decisions when administering the law, namely the legal executive. They likewise incorporate integrative gadgets of the framework as they fill existing or possible lawful deficiencies. General standards of law have been the subject of extensive doctrinal debate in international law, owing to the various connotations attributed to the concept and the hypothetical concerns that they raise. The use of the expression "central standards of international law," which is at the top of the overall set of laws and begins in settlement or custom (e.g., the guideline of sovereign correspondence of states or the rule of the forbiddance of danger or the use of power), and which will not be managed here, causes a lot of confusion. Given the language used in Article 38, paragraph 1(c) of the Statute of the International Court of Justice. ("universal standards of law as recognised by acculturated countries"), the beginning of universal standards of law as applied at the global level has also been a source of debate. The conventional wisdom holds that these standards have their origins in homegrown general systems of laws. Once it is established that some of these broad instruments are frequently shared rules found in domestic systems, they can be utilised in international law as well. They are rational derivations that can be found in any overall group of laws: the standard of restitution for harm committed, the standard of rule understanding, or those used for the purpose of rule struggles—many of them known through Latin adages—are true models. Various general legal standards, such as “audiatur et altera” standards, “actori incumbit onus probandi”, or the method that the designated authority of benefits is also judge of the coincidental locale, have been promoted by the legal executive.

On the question of preference between sources of international law, rules established by treaty will take preference if such an instrument exists. It is also argued however that international treaties and international custom are sources of international law of equal validity; this is that new custom may supersede older treaties and new treaties may override older custom. Also, jus cogens (peremptory norm) is a custom, not a treaty. Certainly, judicial decisions and juristic writings are regarded as auxiliary sources of international law, whereas it is unclear whether the general principles of law recognized by 'civilized nations' should be recognized as a principal or auxiliary source of international law. Nevertheless, treaty, custom, and general principles of law are generally recognized as primary sources of international law.

Main article: Treaties

Treaties and conventions are the persuasive source of international law and are considered "hard law." Treaties can play the role of contracts between two or more parties, such as an extradition treaty or a defense pact. Treaties can also be legislation to regulate a particular aspect of international relations or form the constitutions of international organizations. Whether or not all treaties can be regarded as sources of law, they are sources of obligation for the parties to them. Article 38(1)(a) of the ICJ Statute, which uses the term "international conventions", concentrates upon treaties as a source of contractual obligation but also acknowledges the possibility of a state expressly accepting the obligations of a treaty to which it is not formally a party.

For a treaty-based rule to be a source of law, rather than simply a source of obligation, it must either be capable of affecting non-parties or have consequences for parties more extensive than those specifically imposed by the treaty itself.

Thus, the procedures or methods by treaties become legally binding are formal source of law which is a process by a legal rule comes into existence: it is law creating.

Treaties as custom

Some treaties are the result of codifying existing customary law, such as laws governing the global commons, and jus ad bellum. While the purpose is to establish a code of general application, its effectiveness depends upon the number of states that ratify or accede to the particular convention. Relatively few such instruments have a sufficient number of parties to be regarded as international law in their own right. The most obvious example is the 1949 Geneva Conventions for the Protection of War Victims.

Most multi-lateral treaties fall short of achieving such a near-universal degree of formal acceptance and are dependent upon their provisions being regarded as representing customary international law and, by this indirect route, as binding upon non-parties. This outcome is possible in a number of ways:

  • When the treaty rule reproduces an existing rule of customary law, the rule will be clarified in terms of the treaty provision. A notable example is the Vienna Convention on the Law of Treaties 1969, which was considered by the ICJ to be law even before it had been brought into force.
  • When a customary rule is in the process of development, its incorporation in a multilateral treaty may have the effect of consolidating or crystallizing the law in the form of that rule. It is not always easy to identify when this occurs. Where the practice is less developed, the treaty provision may not be enough to crystallize the rule as part of customary international law.
  • Even if the rule is new, the drafting of the treaty provision may be the impetus for its adoption in the practice of states, and it is the subsequent acceptance of the rule by states that renders it effective as part of customary law. If a broad definition is adopted of state practice, the making of a treaty would fall within the definition. Alternatively, it is possible to regard the treaty as the final act of state practice required to establish the rule in question, or as the necessary articulation of the rule to give it the opinio juris of customary international law.
  • Convention-based "instant custom" has been identified by the ICJ on several occasions as representing customary law without explanation of whether the provision in question was supported by state practice. This has happened with respect to a number of provisions of the Vienna Convention on the Law of Treaties 1969. If "instant custom" is valid as law, it could deny to third parties the normal consequences of non-accession.

The United Nations Charter

Pursuant to Chapter XVI, Article 103 of the United Nations Charter, the obligations under the United Nations Charter overrides the terms of any other treaty. Meanwhile, its Preamble affirms the establishment of the obligations out of treaties and source of international law.

Article 38(1)(b) of the ICJ Statute refers to "international custom" as a source of international law, specifically emphasizing the two requirements of state practice plus acceptance of the practice as obligatory or opinio juris sive necessitatis (usually abbreviated as opinio juris).

Derived from the consistent practice of (originally) Western states accompanied by opinio juris (the conviction of States that the consistent practice is required by a legal obligation), customary international law is differentiated from acts of comity (mutual recognition of government acts) by the presence of opinio juris (although in some instances, acts of comity have developed into customary international law, i.e. diplomatic immunity). Treaties have gradually displaced much customary international law. This development is similar to the replacement of customary or common law by codified law in municipal legal settings, but customary international law continues to play a significant role in international law.

State practice

When examining state practice to determine relevant rules of international law, it is necessary to take into account every activity of the organs and officials of states that relate to that purpose. There has been continuing debate over where a distinction should be drawn as to the weight that should be attributed to what states do, rather than what they say represents the law. In its most extreme form, this would involve rejecting what states say as practice and relegating it to the status of evidence of opinio juris. A more moderate version would evaluate what a state says by reference to the occasion on which the statement was made. It is only relatively powerful countries with extensive international contacts and interests that have regular opportunities of contributing by deed to the practice of international law. The principal means of contribution to state practice for the majority of states will be at meetings of international organizations, particularly the UN General Assembly, by voting and otherwise expressing their view on matters under consideration. Moreover, there are circumstances in which what states say may be the only evidence of their view as to what conduct is required in a particular situation.

The notion of practice establishing a customary rule implies that the practice is followed regularly, or that such state practice must be "common, consistent and concordant". Given the size of the international community, the practice does not have to encompass all states or be completely uniform. There has to be a sufficient degree of participation, especially on the part of states whose interests are likely to be most affected, and an absence of substantial dissent. There have been a number of occasions on which the ICJ has rejected claims that a customary rule existed because of a lack of consistency in the practice brought to its attention.

Within the context of a specific dispute, however, it is not necessary to establish the generality of practice. A rule may apply if a state has accepted the rule as applicable to it individually, or because the two states belong to a group of states between which the rule applies.

A dissenting state is entitled to deny the opposability of a rule in question if it can demonstrate its persistent objection to that rule, either as a member of a regional group or by virtue of its membership of the international community. It is not easy for a single state to maintain its dissent. Also, rules of the jus cogens have a universal character and apply to all states, irrespective of their wishes.

Demand for rules that are responsive to increasingly rapid changes has led to the suggestion that there can be, in appropriate circumstances, such a concept as "instant custom". Even within traditional doctrine, the ICJ has recognized that passage of a short period of time is not necessarily a bar to the formation of a new rule. Because of this, the question is sometimes raised as to whether the word "custom" is suitable to a process that could occur with great rapidity.

Practice by international organizations

It may be argued that the practice of international organizations, most notably that of the United Nations, as it appears in the resolutions of the Security Council and the General Assembly, are an additional source of international law, even though it is not mentioned as such in Article 38(1) of the 1946 Statute of the International Court of Justice. Article 38(1) is closely based on the corresponding provision of the 1920 Statute of the Permanent Court of International Justice, thus predating the role that international organizations have come to play in the international plane. That is, the provision of Article 38(1) may be regarded as 'dated, and this can most vividly be seen in the mention made of 'civilized nations', a mentioning that appears all the more quaint after the decolonization process that took place in the early 1960s and the participation of nearly all nations of the world in the United Nations.

Opinio juris

A wealth of state practice does not usually carry with it a presumption that opinio juris exists. “Not only must the acts concerned amount to a settled practice, but they must also be such, or be carried out in such a way, as to be evidence of a belief that this practice is rendered obligatory by the existence of a rule of law requiring it.”

In cases where practice (of which evidence is given) comprises abstentions from acting, consistency of conduct might not establish the existence of a rule of customary international law. The fact that no nuclear weapons have been used since 1945, for example, does not render their use illegal on the basis of a customary obligation because the necessary opinio juris was lacking.

Although the ICJ has frequently referred to opinio juris as being an equal footing with state practice, the role of the psychological element in the creation of customary law is uncertain.

Jus cogens

A peremptory norm or jus cogens (Latin for "compelling law" or "strong law") is a principle of international law considered so fundamental that it overrides all other sources of international law, including even the Charter of the United Nations. The principle of jus cogens is enshrined in Article 53 of the Vienna Convention on the Law of Treaties:

For the purposes of the present Convention, a peremptory norm of general international law is a norm accepted and recognised by the international community of States as a whole as a norm from which no derogation is permitted and which can be modified only by a subsequent norm of general international law having the same character.

Rules of jus cogens generally require or forbid the state to do particular acts or respect certain rights. However, some define criminal offenses which the state must enforce against individuals. Generally included on lists of such norms are prohibitions of such crimes and internationally wrongful acts as waging aggressive war, war crimes, crimes against humanity, piracy, genocide, apartheid, slavery and torture.

The evidence supporting the emergence of a rule of jus cogens will be essentially similar to that required to establish the creation of a new rule of customary international law. Indeed, jus cogens could be thought of as a special principle of custom with a superadded opinions juries. The European Court of Human Rights has stressed the international public policy aspect of the jus cogens.

The scope of general principles of law, to which Article 38(1) of the Statute of the ICJ refers, is unclear and controversial but may include such legal principles that are common to a large number of systems of municipal law. Given the limits of treaties or custom as sources of international law, Article 38(1) may be looked upon as a directive to the Court to fill any gap in the law and prevent a nonliquet by reference to the general principles.

In earlier stages of the development of international law, rules were frequently drawn from municipal law. In the 19th century, legal positivists rejected the idea that international law could come from any source that did not involve state will or consent but were prepared to allow for the application of general principles of law, provided that they had in some way been accepted by states as part of the legal order. Thus Article 38(1)(c), for example, speaks of general principles "recognized" by states. An area that demonstrates the adoption of municipal approaches is the law applied to the relationship between international officials and their employing organizations, although today the principles are regarded as established international law.

The significance of general principles has undoubtedly been lessened by the increased intensity of treaty and institutional relations between states. Nevertheless, the concepts of estoppel and equity have been employed in the adjudication of international disputes. For example, a state that has, by its conduct, encouraged another state to believe in the existence of a certain legal or factual situation, and to rely on that belief, may be estopped from asserting a contrary situation in its dealings. The principle of good faith was said by the ICJ to be "[o]ne of the basic principles governing the creation and performance of legal obligations". Similarly, there have been frequent references to equity. It is generally agreed that equity cannot be employed to subvert legal rules (that is, operate contra legem). This "equity as law" perception is reinforced by references to equitable principles in the text of the United Nations Convention on the Law of the Sea 1982, though this may be little more than an admission as to the existence, and legitimation, of the discretion of the adjudicator.

However, the principles of estoppel and equity in the international context do not retain all the connotations they do under common law. The reference to the principles as "general" signify that, if rules were to be adapted from municipal law, they should be at a sufficient level of generality to encompass similar rules existing in many municipal systems. Principles of municipal law should be regarded as sources of inspiration rather than as sources of rules of direct application.

According to Article 38(1)(d) of its Statute, the ICJ is also to apply "judicial decisions and the teachings of the most highly qualified publicists of the various nations, as subsidiary means for the determination of rules of law". It is difficult to tell what influence these materials have on the development of the law. Pleadings in cases before the ICJ are often replete with references to case law and to legal literature.

Judicial decisions

The decisions of international and municipal courts and the publications of academics can be referred to, not as a source of law as such, but as a means of recognizing the law established in other sources. In practice, the International Court of Justice does not refer to domestic decisions although it does invoke its previous case-law.

There is no rule of stare decisis in international law. The decision of the Court has no binding force except between the parties and in respect of that particular case. Nevertheless, often the Court would refer to its past decisions and advisory opinions to support its explanation of a present case.

Often the International Court of Justice will consider General Assembly resolutions as indicative of customary international law.

Juristic writings

Article 38(1)(d) of the International Court of Justice Statute states that the 'teachings of the most highly qualified publicists of the various nations' are also among the 'subsidiary means for the determination of the rules of law'. The scholarly works of prominent jurists are not sources of international law but are essential in developing the rules that are sourced in treaties, custom and the general principles of law. This is accepted practice in the interpretation of international law and was utilized by the United States Supreme Court in The Paquete Habana case (175 US (1900) 677 at 700-1).

  1. What are the Sources of international law?, Available at Learning the Law. Also see Definition of international law
  2. Statute of the International Court of Justice.
  3. Statute of the International Court of Justice.
  4. Martin Dixon, Textbook on International Law (Oxford University Press, 7th ed 2013) 24
  5. Legal Consequences for States of the Continued Presence of South Africa in Namibia (South-West Africa) notwithstanding Security Council Resolution 276 (1970) (Advisory Opinion) [1971] ICJ Reports 16 at 47.
  6. North Sea Continental Shelf cases, note 6 at 38.
  7. North Sea Continental Shelf cases, note 6 at 41. See also Trial of the Major War Criminals before the International Military Tribunal, Vol. 1, Judgment, 171 at 253–4.
  8. D'Amato, A., The Concept of Custom in International Law (Cornell University Press: Ithaca, New York, 1971) at 88.
  9. Thirlway, H., International Customary Law and its Codification (A. W. Sijthoff: Leiden, 1972) at 58.
  10. See Case Concerning Military and Paramilitary Activities in and against Nicaragua (Nicaragua v United States of America) (Merits) [1986] ICJ Reports 14.
  11. Fisheries Jurisdiction Case (United Kingdom v Iceland) (Merits) [1974] ICJ Reports 3 at 50.
  12. North Sea Continental Shelf Cases (Federal Republic of Germany v Denmark; Federal Republic of Germany v Netherlands) [1969] ICJ Reports 4 at 42.
  13. Nicaragua case (Merits), note 4 at 98.
  14. Asylum Case (Colombia v Peru) [1950] ICJ Rep 266 at 277; Advisory Opinion on the Legality of the Threat or Use by a State of Nuclear Weapons in Armed Conflict [1996] ICJ Reports 226.
  15. Case Concerning Right of Passage over Indian Territory (Portugal v India) (Merits) [1960] ICJ Reports 6 at 39; Asylum case, note 8 at 276.
  16. North Sea Continental Shelf cases, note 6 at 229, 232 per Judge Lachs.
  17. Asylum case, note 8 at 277–8.
  18. Fisheries Case (United Kingdom v Norway) (Judgment) [1951] ICJ Reports 116, at 131.
  19. See North Sea Continental Shelf cases, note 6 at 229 per Judge Lachs.
  20. North Sea Continental Shelf cases, note 6 at 43.
  21. See North Sea Continental Shelf cases, note 6 at 44.
  22. Legality of Nuclear Weapons Advisory Opinion (GA), note 8.
  23. Case Concerning the Continental Shelf (Libyan Arab Jamahiriya v Malta) (Judgment) [1985] ICJ Reports 13 at 29; Legality of Nuclear Weapons Advisory Opinion (GA), note 8 at 16.
  24. 1155 UNTS 331.
  25. Amerasinghe, C., The Law of the International Civil Service, 2nd rev. ed, vol. 1 (Clarendon Press: Oxford, 1994) at 151–8.
  26. See North Sea Continental Shelf cases, note 6 at 26; Flegenheimer Claim 25 ILR 91; Case Concerning the Temple of Preah Vihear (Cambodia v Thailand) (Merits) [1962] ICJ Reports 6 at 32–3.
  27. Nuclear Tests Cases (Australia v France; New Zealand v France) [1974] ICJ Reports 253 at 268.
  28. River Meuse Case (Netherlands v Belgium) PCIJ Reports Series A/B No 70 76 at 76 per Judge Hudson.
  29. Case Concerning the Frontier Dispute (Burkina Faso v Republic of Mali) (Judgment) [1986] ICJ Reports 554 at 567–8; North Sea Continental Shelf cases, note 6 at 46–50.
  30. International Status of South-West Africa (Advisory Opinion) [1950] ICJ Reports 128 at 148.
  31. Article 59 of the ICJ Statute Statute of the International Court of Justice.
  • Thirlway, H., International Customary Law and its Codification (A. W. Sijthoff: Leiden, 1972).

Sources of international law
Sources of international law Article Talk Language Watch Edit 160 160 Redirected from General principle of international law This article may require cleanup to meet Wikipedia s quality standards The specific problem is general standards Please help improve this article if you can December 2019 Learn how and when to remove this template message International law also known as law of nations is the name of a body of rules which regulate the conduct of sovereign states in their relations with one another 1 Sources of international law include treaties international customs general widely recognized principles of law the decisions of national and lower courts and scholarly writings They are the materials and processes out of which the rules and principles regulating the international community are developed They have been influenced by a range of political and legal theories Contents 1 Modern views 2 Historic considerations and development 3 Hierarchy 4 Treaties as law 4 1 Treaties as custom 4 2 The United Nations Charter 5 International custom 5 1 State practice 5 2 Practice by international organizations 5 3 Opinio juris 5 4 Jus cogens 6 General principles of law 7 Judicial decisions and juristic writings 7 1 Judicial decisions 7 2 Juristic writings 8 See also 9 References 10 Further reading 11 External linksModern views EditArticle 38 1 of the Statute of the International Court of Justice is generally recognized as a definitive statement of the sources of international law It requires the Court to apply among other things a international conventions whether general or particular establishing rules expressly recognized by the contesting states b international custom as evidence of a general practice accepted as law c the general principles of law recognized by civilized nations d subject to the provisions of Article 59 judicial decisions and the teachings of the most highly qualified publicists of the various nations as subsidiary means for the determination of rules of law 1 Historic considerations and development EditDuring the 19th century it was recognized by legal positivists that a sovereign could limit its authority to act by consenting to an agreement according to the principle pacta sunt servanda This consensual view of international law was reflected in the 1920 Statute of the Permanent Court of International Justice and was later preserved in Article 38 1 of the 1946 Statute of the International Court of Justice 2 The core of broad principles of law is general and dynamic and they can sometimes be reduced to a proverb or a basic idea Unlike other types of regulations such as ordered law or agreements broad standards of law have not been established according to the right sources of law General norms of law on the other hand are regarded as a component of positive law even if they are only used as auxiliary devices They define critical principles for the framework s actual operation and in general are drafted from the lawful thinking of those entitled to make valid decisions when administering the law namely the legal executive They likewise incorporate integrative gadgets of the framework as they fill existing or possible lawful deficiencies General standards of law have been the subject of extensive doctrinal debate in international law owing to the various connotations attributed to the concept and the hypothetical concerns that they raise The use of the expression central standards of international law which is at the top of the overall set of laws and begins in settlement or custom e g the guideline of sovereign correspondence of states or the rule of the forbiddance of danger or the use of power and which will not be managed here causes a lot of confusion Given the language used in Article 38 paragraph 1 c of the Statute of the International Court of Justice 3 universal standards of law as recognised by acculturated countries the beginning of universal standards of law as applied at the global level has also been a source of debate The conventional wisdom holds that these standards have their origins in homegrown general systems of laws Once it is established that some of these broad instruments are frequently shared rules found in domestic systems they can be utilised in international law as well They are rational derivations that can be found in any overall group of laws the standard of restitution for harm committed the standard of rule understanding or those used for the purpose of rule struggles many of them known through Latin adages are true models Various general legal standards such as audiatur et altera standards actori incumbit onus probandi or the method that the designated authority of benefits is also judge of the coincidental locale have been promoted by the legal executive Hierarchy EditOn the question of preference between sources of international law rules established by treaty will take preference if such an instrument exists It is also argued however that international treaties and international custom are sources of international law of equal validity this is that new custom may supersede older treaties and new treaties may override older custom Also jus cogens peremptory norm is a custom not a treaty Certainly judicial decisions and juristic writings are regarded as auxiliary sources of international law whereas it is unclear whether the general principles of law recognized by civilized nations should be recognized as a principal or auxiliary source of international law Nevertheless treaty custom and general principles of law are generally recognized as primary sources of international law Treaties as law EditMain article Treaties Treaties and conventions are the persuasive source of international law and are considered hard law Treaties can play the role of contracts between two or more parties such as an extradition treaty or a defense pact Treaties can also be legislation to regulate a particular aspect of international relations or form the constitutions of international organizations Whether or not all treaties can be regarded as sources of law they are sources of obligation for the parties to them Article 38 1 a of the ICJ Statute which uses the term international conventions concentrates upon treaties as a source of contractual obligation but also acknowledges the possibility of a state expressly accepting the obligations of a treaty to which it is not formally a party For a treaty based rule to be a source of law rather than simply a source of obligation it must either be capable of affecting non parties or have consequences for parties more extensive than those specifically imposed by the treaty itself Thus the procedures or methods by treaties become legally binding are formal source of law which is a process by a legal rule comes into existence it is law creating 4 Treaties as custom Edit Some treaties are the result of codifying existing customary law such as laws governing the global commons and jus ad bellum While the purpose is to establish a code of general application its effectiveness depends upon the number of states that ratify or accede to the particular convention Relatively few such instruments have a sufficient number of parties to be regarded as international law in their own right The most obvious example is the 1949 Geneva Conventions for the Protection of War Victims Most multi lateral treaties fall short of achieving such a near universal degree of formal acceptance and are dependent upon their provisions being regarded as representing customary international law and by this indirect route as binding upon non parties This outcome is possible in a number of ways When the treaty rule reproduces an existing rule of customary law the rule will be clarified in terms of the treaty provision A notable example is the Vienna Convention on the Law of Treaties 1969 which was considered by the ICJ to be law even before it had been brought into force 5 When a customary rule is in the process of development its incorporation in a multilateral treaty may have the effect of consolidating or crystallizing the law in the form of that rule It is not always easy to identify when this occurs Where the practice is less developed the treaty provision may not be enough to crystallize the rule as part of customary international law 6 Even if the rule is new the drafting of the treaty provision may be the impetus for its adoption in the practice of states and it is the subsequent acceptance of the rule by states that renders it effective as part of customary law 7 If a broad definition is adopted of state practice the making of a treaty would fall within the definition Alternatively it is possible to regard the treaty as the final act of state practice required to establish the rule in question or as the necessary articulation of the rule to give it the opinio juris of customary international law Convention based instant custom has been identified by the ICJ on several occasions as representing customary law without explanation of whether the provision in question was supported by state practice This has happened with respect to a number of provisions of the Vienna Convention on the Law of Treaties 1969 If instant custom is valid as law it could deny to third parties the normal consequences of non accession The United Nations Charter Edit Pursuant to Chapter XVI Article 103 of the United Nations Charter the obligations under the United Nations Charter overrides the terms of any other treaty Meanwhile its Preamble affirms the establishment of the obligations out of treaties and source of international law International custom EditMain article Customary international law Article 38 1 b of the ICJ Statute refers to international custom as a source of international law specifically emphasizing the two requirements of state practice plus acceptance of the practice as obligatory or opinio juris sive necessitatis usually abbreviated as opinio juris Derived from the consistent practice of originally Western states accompanied by opinio juris the conviction of States that the consistent practice is required by a legal obligation customary international law is differentiated from acts of comity mutual recognition of government acts by the presence of opinio juris although in some instances acts of comity have developed into customary international law i e diplomatic immunity Treaties have gradually displaced much customary international law This development is similar to the replacement of customary or common law by codified law in municipal legal settings but customary international law continues to play a significant role in international law State practice Edit When examining state practice to determine relevant rules of international law it is necessary to take into account every activity of the organs and officials of states that relate to that purpose There has been continuing debate over where a distinction should be drawn as to the weight that should be attributed to what states do rather than what they say represents the law In its most extreme form this would involve rejecting what states say as practice and relegating it to the status of evidence of opinio juris 8 A more moderate version would evaluate what a state says by reference to the occasion on which the statement was made 9 It is only relatively powerful countries with extensive international contacts and interests that have regular opportunities of contributing by deed to the practice of international law The principal means of contribution to state practice for the majority of states will be at meetings of international organizations particularly the UN General Assembly by voting and otherwise expressing their view on matters under consideration Moreover there are circumstances in which what states say may be the only evidence of their view as to what conduct is required in a particular situation 10 The notion of practice establishing a customary rule implies that the practice is followed regularly or that such state practice must be common consistent and concordant 11 Given the size of the international community the practice does not have to encompass all states or be completely uniform There has to be a sufficient degree of participation especially on the part of states whose interests are likely to be most affected 12 and an absence of substantial dissent 13 There have been a number of occasions on which the ICJ has rejected claims that a customary rule existed because of a lack of consistency in the practice brought to its attention 14 Within the context of a specific dispute however it is not necessary to establish the generality of practice A rule may apply if a state has accepted the rule as applicable to it individually or because the two states belong to a group of states between which the rule applies 15 A dissenting state is entitled to deny the opposability of a rule in question if it can demonstrate its persistent objection to that rule 16 either as a member of a regional group 17 or by virtue of its membership of the international community 18 It is not easy for a single state to maintain its dissent Also rules of the jus cogens have a universal character and apply to all states irrespective of their wishes 19 Demand for rules that are responsive to increasingly rapid changes has led to the suggestion that there can be in appropriate circumstances such a concept as instant custom Even within traditional doctrine the ICJ has recognized that passage of a short period of time is not necessarily a bar to the formation of a new rule 20 Because of this the question is sometimes raised as to whether the word custom is suitable to a process that could occur with great rapidity Practice by international organizations Edit It may be argued that the practice of international organizations most notably that of the United Nations as it appears in the resolutions of the Security Council and the General Assembly are an additional source of international law even though it is not mentioned as such in Article 38 1 of the 1946 Statute of the International Court of Justice Article 38 1 is closely based on the corresponding provision of the 1920 Statute of the Permanent Court of International Justice thus predating the role that international organizations have come to play in the international plane That is the provision of Article 38 1 may be regarded as dated and this can most vividly be seen in the mention made of civilized nations a mentioning that appears all the more quaint after the decolonization process that took place in the early 1960s and the participation of nearly all nations of the world in the United Nations Opinio juris Edit A wealth of state practice does not usually carry with it a presumption that opinio juris exists Not only must the acts concerned amount to a settled practice but they must also be such or be carried out in such a way as to be evidence of a belief that this practice is rendered obligatory by the existence of a rule of law requiring it 21 In cases where practice of which evidence is given comprises abstentions from acting consistency of conduct might not establish the existence of a rule of customary international law The fact that no nuclear weapons have been used since 1945 for example does not render their use illegal on the basis of a customary obligation because the necessary opinio juris was lacking 22 Although the ICJ has frequently referred to opinio juris as being an equal footing with state practice 23 the role of the psychological element in the creation of customary law is uncertain Jus cogens Edit A peremptory norm or jus cogens Latin for compelling law or strong law is a principle of international law considered so fundamental that it overrides all other sources of international law including even the Charter of the United Nations The principle of jus cogens is enshrined in Article 53 of the Vienna Convention on the Law of Treaties For the purposes of the present Convention a peremptory norm of general international law is a norm accepted and recognised by the international community of States as a whole as a norm from which no derogation is permitted and which can be modified only by a subsequent norm of general international law having the same character 24 Rules of jus cogens generally require or forbid the state to do particular acts or respect certain rights However some define criminal offenses which the state must enforce against individuals Generally included on lists of such norms are prohibitions of such crimes and internationally wrongful acts as waging aggressive war war crimes crimes against humanity piracy genocide apartheid slavery and torture The evidence supporting the emergence of a rule of jus cogens will be essentially similar to that required to establish the creation of a new rule of customary international law Indeed jus cogens could be thought of as a special principle of custom with a superadded opinions juries The European Court of Human Rights has stressed the international public policy aspect of the jus cogens General principles of law EditThe scope of general principles of law to which Article 38 1 of the Statute of the ICJ refers is unclear and controversial but may include such legal principles that are common to a large number of systems of municipal law Given the limits of treaties or custom as sources of international law Article 38 1 may be looked upon as a directive to the Court to fill any gap in the law and prevent a nonliquet by reference to the general principles In earlier stages of the development of international law rules were frequently drawn from municipal law In the 19th century legal positivists rejected the idea that international law could come from any source that did not involve state will or consent but were prepared to allow for the application of general principles of law provided that they had in some way been accepted by states as part of the legal order Thus Article 38 1 c for example speaks of general principles recognized by states An area that demonstrates the adoption of municipal approaches is the law applied to the relationship between international officials and their employing organizations 25 although today the principles are regarded as established international law The significance of general principles has undoubtedly been lessened by the increased intensity of treaty and institutional relations between states Nevertheless the concepts of estoppel and equity have been employed in the adjudication of international disputes For example a state that has by its conduct encouraged another state to believe in the existence of a certain legal or factual situation and to rely on that belief may be estopped from asserting a contrary situation in its dealings 26 The principle of good faith was said by the ICJ to be o ne of the basic principles governing the creation and performance of legal obligations 27 Similarly there have been frequent references to equity 28 It is generally agreed that equity cannot be employed to subvert legal rules that is operate contra legem 29 This equity as law perception is reinforced by references to equitable principles in the text of the United Nations Convention on the Law of the Sea 1982 though this may be little more than an admission as to the existence and legitimation of the discretion of the adjudicator However the principles of estoppel and equity in the international context do not retain all the connotations they do under common law The reference to the principles as general signify that if rules were to be adapted from municipal law they should be at a sufficient level of generality to encompass similar rules existing in many municipal systems Principles of municipal law should be regarded as sources of inspiration rather than as sources of rules of direct application 30 Judicial decisions and juristic writings EditAccording to Article 38 1 d of its Statute the ICJ is also to apply judicial decisions and the teachings of the most highly qualified publicists of the various nations as subsidiary means for the determination of rules of law It is difficult to tell what influence these materials have on the development of the law Pleadings in cases before the ICJ are often replete with references to case law and to legal literature Judicial decisions Edit The decisions of international and municipal courts and the publications of academics can be referred to not as a source of law as such but as a means of recognizing the law established in other sources In practice the International Court of Justice does not refer to domestic decisions although it does invoke its previous case law There is no rule of stare decisis in international law The decision of the Court has no binding force except between the parties and in respect of that particular case 31 Nevertheless often the Court would refer to its past decisions and advisory opinions to support its explanation of a present case Often the International Court of Justice will consider General Assembly resolutions as indicative of customary international law Juristic writings Edit Article 38 1 d of the International Court of Justice Statute states that the teachings of the most highly qualified publicists of the various nations are also among the subsidiary means for the determination of the rules of law The scholarly works of prominent jurists are not sources of international law but are essential in developing the rules that are sourced in treaties custom and the general principles of law This is accepted practice in the interpretation of international law and was utilized by the United States Supreme Court in The Paquete Habana case 175 US 1900 677 at 700 1 See also EditInternational law Preamble to the United Nations CharterReferences Edit What are the Sources of international law Available at Learning the Law Also see Definition of international law Statute of the International Court of Justice Statute of the International Court of Justice Martin Dixon Textbook on International Law Oxford University Press 7th ed 2013 24 Legal Consequences for States of the Continued Presence of South Africa in Namibia South West Africa notwithstanding Security Council Resolution 276 1970 Advisory Opinion 1971 ICJ Reports 16 at 47 North Sea Continental Shelf cases note 6 at 38 North Sea Continental Shelf cases note 6 at 41 See also Trial of the Major War Criminals before the International Military Tribunal Vol 1 Judgment 171 at 253 4 D Amato A The Concept of Custom in International Law Cornell University Press Ithaca New York 1971 at 88 Thirlway H International Customary Law and its Codification A W Sijthoff Leiden 1972 at 58 See Case Concerning Military and Paramilitary Activities in and against Nicaragua Nicaragua v United States of America Merits 1986 ICJ Reports 14 Fisheries Jurisdiction Case United Kingdom v Iceland Merits 1974 ICJ Reports 3 at 50 North Sea Continental Shelf Cases Federal Republic of Germany v Denmark Federal Republic of Germany v Netherlands 1969 ICJ Reports 4 at 42 Nicaragua case Merits note 4 at 98 Asylum Case Colombia v Peru 1950 ICJ Rep 266 at 277 Advisory Opinion on the Legality of the Threat or Use by a State of Nuclear Weapons in Armed Conflict 1996 ICJ Reports 226 Case Concerning Right of Passage over Indian Territory Portugal v India Merits 1960 ICJ Reports 6 at 39 Asylum case note 8 at 276 North Sea Continental Shelf cases note 6 at 229 232 per Judge Lachs Asylum case note 8 at 277 8 Fisheries Case United Kingdom v Norway Judgment 1951 ICJ Reports 116 at 131 See North Sea Continental Shelf cases note 6 at 229 per Judge Lachs North Sea Continental Shelf cases note 6 at 43 See North Sea Continental Shelf cases note 6 at 44 Legality of Nuclear Weapons Advisory Opinion GA note 8 Case Concerning the Continental Shelf Libyan Arab Jamahiriya v Malta Judgment 1985 ICJ Reports 13 at 29 Legality of Nuclear Weapons Advisory Opinion GA note 8 at 16 1155 UNTS 331 Amerasinghe C The Law of the International Civil Service 2nd rev ed vol 1 Clarendon Press Oxford 1994 at 151 8 See North Sea Continental Shelf cases note 6 at 26 Flegenheimer Claim 25 ILR 91 Case Concerning the Temple of Preah Vihear Cambodia v Thailand Merits 1962 ICJ Reports 6 at 32 3 Nuclear Tests Cases Australia v France New Zealand v France 1974 ICJ Reports 253 at 268 River Meuse Case Netherlands v Belgium PCIJ Reports Series A B No 70 76 at 76 per Judge Hudson Case Concerning the Frontier Dispute Burkina Faso v Republic of Mali Judgment 1986 ICJ Reports 554 at 567 8 North Sea Continental Shelf cases note 6 at 46 50 International Status of South West Africa Advisory Opinion 1950 ICJ Reports 128 at 148 Article 59 of the ICJ Statute Statute of the International Court of Justice Further reading EditThirlway H International Customary Law and its Codification A W Sijthoff Leiden 1972 External links EditA Brief Primer on International Law With cases and commentary Nathaniel Burney 2007 Official United Nations website Official UN website on International Law Official website of the International Court of Justice Sources of International Law Geneva Universities course on International Public Law by Robert Kolb Retrieved from https en wikipedia org w index php title Sources of international law amp oldid 1056539452 General principles of law, wikipedia, wiki, book,

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