In geography , hydrography , and fluvial geomorphology , a thalweg or talweg ( / ˈ t ɑː l v ɛ ɡ / ) is the line or curve of lowest elevation within a valley or watercourse . Its vertical position in maps is the nadir (greatest depth, sounding ) in the stream profile .
133-410: Under international law , a thalweg is instead taken to be the middle of the primary navigable channel of a waterway which is the default legal presumption for the boundary between entities such as states . Thalwegs can have local proprietorial and administrative significance because their formerly somewhat shifting position, reliant on renewed soundings, now more fixed as described internationally,
266-604: A national legal system and international law is complex and variable. National law may become international law when treaties permit national jurisdiction to supranational tribunals such as the European Court of Human Rights or the International Criminal Court . Treaties such as the Geneva Conventions require national law to conform to treaty provisions. National laws or constitutions may also provide for
399-496: A "general recognition" by states "whose interests are specially affected". The second element of the test, opinio juris, the belief of a party that a particular action is required by the law is referred to as the subjective element. The ICJ has stated in dictum in North Sea Continental Shelf that, "Not only must the acts concerned amount to a settled practice, but they must also be such, or be carried out in such
532-886: A UN agency with the mission of protecting employment rights which was established in 1919. The ILO has a constitution setting out a number of aims, including regulating work hours and labour supply, protecting workers and children and recognising equal pay and the right to free association, as well as the Declaration of Philadelphia of 1944, which re-defined the purpose of the ILO. The 1998 Declaration on Fundamental Principles and Rights at Work further binds ILO member states to recognise fundamental labour rights including free association, collective bargaining and eliminating forced labour, child labour and employment discrimination. The ILO have also created labour standards which are set out in their conventions and recommendations. Member states then have
665-399: A broad range of domains, including war and diplomacy , economic relations , and human rights . International law differs from state-based domestic legal systems in that it operates largely through consent , since there is no universally accepted authority to enforce it upon sovereign states . States and non-state actors may choose to not abide by international law, and even to breach
798-719: A comprehensive law of the sea was in the 1950s, shortly after the Truman proclamation on the continental shelf. In 1956, the United Nations held its first Conference on the Law of the Sea ( UNCLOS I) in Geneva , Switzerland, which resulted in four treaties concluded in 1958: The Convention on the Continental Shelf effectively codified Truman's proclamation as customary international law. While UNCLOS I
931-403: A dispute, determining if a domestic court has jurisdiction and determining whether foreign judgments can be enforced . The first question relates to whether the domestic court or a foreign court is best placed to decide the case. When determining the national law that should apply, the lex causae is the law that has been chosen to govern the case, which is generally foreign, and the lexi fori
1064-567: A local judgment between the same parties. On a global level, the New York Convention on the Recognition and Enforcement of Foreign Arbitral Awards was introduced in 1958 to internationalise the enforcement of arbitral awards , although it does not have jurisdiction over court judgments. A state must prove that it has jurisdiction before it can exercise its legal authority. This concept can be divided between prescriptive jurisdiction, which
1197-487: A multilateral treaty. Where a treaty does not have provisions allowing for termination or withdrawal, such as the Genocide Convention, it is prohibited unless the right was implied into the treaty or the parties had intended to allow for it. A treaty can also be held invalid, including where parties act ultra vires or negligently, where execution has been obtained through fraudulent, corrupt or forceful means, or where
1330-606: A number of countries began to distinguish between acta jure gestionis , commercial actions, and acta jure imperii , government actions; the restrictive theory of immunity said states were immune where they were acting in a governmental capacity but not a commercial one. The European Convention on State Immunity in 1972 and the UN Convention on Jurisdictional Immunities of States and their Property attempt to restrict immunity in accordance with customary law. Historically individuals have not been seen as entities in international law, as
1463-567: A number of international customs, treaties, and agreements, modern law of the sea derives largely from the United Nations Convention on the Law of the Sea. That convention is effective since 1994, and is generally accepted as a codification of customary international law of the sea, and is sometimes regarded as the "constitution of the oceans". Law of the sea is the public law counterpart to admiralty law (also known as maritime law), which applies to private maritime issues, such as
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#17330844892131596-450: A number of provisions, of which the most significant concerned navigation, archipelagic status and transit regimes, exclusive economic zones (EEZs), continental shelf jurisdiction, deep seabed mining , the exploitation regime, protection of the marine environment, scientific research, and settlement of disputes. It also set the limit of various areas, measured from a carefully defined sea baseline . The convention also codified freedom of
1729-749: A number of treaties focused on environmental protection were ratified, including the Declaration of the United Nations Conference on the Human Environment of 1972, the World Charter for Nature of 1982, and the Vienna Convention for the Protection of the Ozone Layer of 1985. States generally agreed to co-operate with each other in relation to environmental law, as codified by principle 24 of
1862-433: A particular legal circumstance. Historically the comity theory has been used although the definition is unclear, sometimes referring to reciprocity and sometimes being used as a synonym for private international law. Story distinguished it from "any absolute paramount obligation, superseding all discretion on the subject". There are three aspects to conflict of laws – determining which domestic court has jurisdiction over
1995-602: A range of entities, including the Church , mercantile city-states, and kingdoms, most of which had overlapping and ever-changing jurisdictions. As in China and India, these divisions prompted the development of rules aimed at providing stable and predictable relations. Early examples include canon law , which governed ecclesiastical institutions and clergy throughout Europe; the lex mercatoria ("merchant law"), which concerned trade and commerce; and various codes of maritime law , such as
2128-613: A special status. The rules in a treaty can only be considered national law if the contents of the treaty have been enacted first. An example is the United Kingdom; after the country ratified the European Convention on Human Rights , the convention was only considered to have the force of law in national law after Parliament passed the Human Rights Act 1998 . In practice, the division of countries between monism and dualism
2261-435: A starting point but does not recognise that organisations can have no separate personality but nevertheless function as an international organisation. The UN Economic and Social Council has emphasised a split between inter-government organisations (IGOs), which are created by inter-governmental agreements, and international non-governmental organisations (INGOs). All international organisations have members; generally this
2394-546: A state and res communis which is territory that cannot be acquired by a state. There have historically been five methods of acquiring territorial sovereignty , reflecting Roman property law: occupation, accretion, cession , conquest and prescription . The law of the sea is the area of international law concerning the principles and rules by which states and other entities interact in maritime matters. It encompasses areas and issues such as navigational rights, sea mineral rights, and coastal waters jurisdiction. The law of
2527-400: A state and, separately, it may recognise that nation's government as being legitimate and capable of representing the state on the international stage. There are two theories on recognition; the declaratory theory sees recognition as commenting on a current state of law which has been separately satisfied whereas the constitutive theory states that recognition by other states determines whether
2660-431: A state can be considered to have legal personality. States can be recognised explicitly through a released statement or tacitly through conducting official relations, although some countries have formally interacted without conferring recognition. Throughout the 19th century and the majority of the 20th century, states were protected by absolute immunity, so they could not face criminal prosecution for any actions. However
2793-405: A thalweg helps stabilize natural rivers' course and depth. Placing boulders along the thalweg helps to protect the channel's sedimentary erosion and deposit balance. In concurrence with this, doing so along an instream to form artificial sills helps to slow the sedimentary erosion and deposit of watercourses, while keeping the esteem (fishing, local wildlife, and recreation) and natural resources of
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#17330844892132926-414: A treaty "shall be interpreted in good faith in accordance with the ordinary meaning to be given to the terms of the treaty in their context and in the light of its object and purpose". This represents a compromise between three theories of interpretation: the textual approach which looks to the ordinary meaning of the text, the subjective approach which considers factors such as the drafters' intention, and
3059-634: A treaty but such violations, particularly of peremptory norms , can be met with disapproval by others and in some cases coercive action ranging from diplomatic and economic sanctions to war. The sources of international law include international custom (general state practice accepted as law), treaties , and general principles of law recognised by most national legal systems. Although international law may also be reflected in international comity —the practices adopted by states to maintain good relations and mutual recognition—such traditions are not legally binding . The relationship and interaction between
3192-492: 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". A committee of the International Law Association has argued that there is a general presumption of an opinio juris where state practice is proven but it may be necessary if the practice suggests that the states did not believe it was creating a precedent. The test in these circumstances
3325-635: A wide variety of nations. Because the EEZ is so extensive, many ITLOS cases concern competing claims over the ocean boundaries between states As of 2017, ITLOS had settled 25 cases. Other types of intergovernental organizations enforcing the law of the sea include UN FAO regional fishery bodies and arrangements , as well as UNEP regional seas conventions and action plans . Law of the sea should be distinguished from maritime law , which concerns maritime issues and disputes among private parties, such as individuals, international organizations, or corporations. However,
3458-561: Is a body of international law governing the rights and duties of states in maritime environments . It concerns matters such as navigational rights, sea mineral claims, and coastal waters jurisdiction. The connotation of ocean law is somewhat broader, but the law of the sea (anchored in the United Nations Convention on the Law of the Sea (UNCLOS)) is so comprehensive that it covers all areas of ocean law as well (e.g., marine environmental law, maritime law ). While drawn from
3591-583: Is a compound noun that is built from the German elements Thal (since Duden 's orthography reform of 1901 written Tal ) meaning valley (cognate with dale in English), and Weg , meaning way. It means "valley way" and is used, with its modern spelling Talweg , in daily German to describe a path or road which follows the bottom of a valley, or in geography with the more technical meaning also adopted by English. In hydrological and fluvial landforms,
3724-461: Is also able to issue a conditional declaration stating that it will consent to a given treaty only on the condition of a particular provision or interpretation. Article 54 of the VCLT provides that either party may terminate or withdraw from a treaty in accordance with its terms or at any time with the consent of the other party, with 'termination' applying to a bilateral treaty and 'withdrawal' applying to
3857-584: Is claiming rights under refugee law but as, argued by the political theorist Hannah Arendt , human rights are often tied to someone's nationality. The European Court of Human Rights allows individuals to petition the court where their rights have been violated and national courts have not intervened and the Inter-American Court of Human Rights and the African Court on Human and Peoples' Rights have similar powers. Traditionally, sovereign states and
3990-452: Is considered the seminal event in international law. The resulting Westphalian sovereignty is said to have established the current international legal order characterised by independent nation states , which have equal sovereignty regardless of their size and power, defined primarily by non-interference in the domestic affairs of sovereign states, although historians have challenged this narrative. The idea of nationalism further solidified
4123-613: Is defined under Article 1 of the Montevideo Convention on the Rights and Duties of States as a legal person with a permanent population, a defined territory, government and capacity to enter relations with other states. There is no requirement on population size, allowing micro-states such as San Marino and Monaco to be admitted to the UN, and no requirement of fully defined boundaries, allowing Israel to be admitted despite border disputes . There
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4256-407: Is no academic consensus about what is included within this scope. They are considered to be derived from both national and international legal systems, although including the latter category has led to debate about potential cross-over with international customary law. The relationship of general principles to treaties or custom has generally been considered to be "fill[ing] the gaps" although there
4389-591: Is often more complicated; countries following both approaches may accept peremptory norms as being automatically binding and they may approach treaties, particularly later amendments or clarifications, differently than they would approach customary law. Many countries with older or unwritten constitutions do not have explicit provision for international law in their domestic system and there has been an upswing in support for monism principles in relation to human rights and humanitarian law, as most principles governing these concepts can be found in international law. A state
4522-531: Is part of centuries-old custom and practice in some jurisdictions. In some jurisdictions and between some states the median line (between banks) is the preferred boundary presumption as may extend from estuaries. Also being easy to map, drawing "turning points" are the solution for a few major rivers such as the St Lawrence River -Great Lakes system. The word thalweg is of 19th-century German origin. The German word Thalweg (modern spelling Talweg )
4655-615: Is restricted to states, although it can include other international organisations. Sometimes non-members will be allowed to participate in meetings as observers. The Yearbook of International Organizations sets out a list of international organisations, which include the UN, the WTO, the World Bank and the IMF. Generally organisations consist of a plenary organ, where member states can be represented and heard; an executive organ, to decide matters within
4788-485: Is still no conclusion about their exact relationship in the absence of a hierarchy. A treaty is defined in Article 2 of the Vienna Convention on the Law of Treaties (VCLT) as "an international agreement concluded between States in written form and governed by international law, whether embodied in a single instrument or in two or more related instruments and whatever its particular designation". The definition specifies that
4921-471: Is the territorial principle , which states that a nation has jurisdiction over actions which occur within its territorial boundaries. The second is the nationality principle , also known as the active personality principle, whereby a nation has jurisdiction over actions committed by its nationals regardless of where they occur. The third is the passive personality principle, which gives a country jurisdiction over any actions which harm its nationals. The fourth
5054-578: Is the authority of a legislature to enact legislation on a particular issue, and adjudicative jurisdiction, which is the authority of a court to hear a particular case. This aspect of private international law should first be resolved by reference to domestic law, which may incorporate international treaties or other supranational legal concepts, although there are consistent international norms. There are five forms of jurisdiction which are consistently recognised in international law; an individual or act can be subject to multiple forms of jurisdiction. The first
5187-444: Is the national law of the court making the determination. Some examples are lex domicilii , the law of the domicile, and les patriae , the law of the nationality. The rules which are applied to conflict of laws will vary depending on the national system determining the question. There have been attempts to codify an international standard to unify the rules so differences in national law cannot lead to inconsistencies, such as through
5320-467: Is the protective principle, where a nation has jurisdiction in relation to threats to its "fundamental national interests". The final form is universal jurisdiction , where a country has jurisdiction over certain acts based on the nature of the crime itself. Following World War II, the modern system for international human rights was developed to make states responsible for their human rights violations. The UN Economic and Security Council established
5453-428: Is whether opinio juris can be proven by the states' failure to protest. Other academics believe that intention to create customary law can be shown by states including the principle in multiple bilateral and multilateral treaties, so that treaty law is necessary to form customs. The adoption of the VCLT in 1969 established the concept of jus cogens , or peremptory norms, which are "a norm accepted and recognized by
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5586-496: Is widely regarded as the father of international law, being one of the first scholars to articulate an international order that consists of a "society of states" governed not by force or warfare but by actual laws, mutual agreements, and customs. Grotius secularised international law; his 1625 work, De Jure Belli ac Pacis , laid down a system of principles of natural law that bind all nations regardless of local custom or law. He inspired two nascent schools of international law,
5719-531: The "Uniting for Peace" resolution of 3 November 1950, which allowed the organ to pass recommendations to authorize the use of force. This resolution also led to the practice of UN peacekeeping , which has been notably been used in East Timor and Kosovo . There are more than one hundred international courts in the global community, although states have generally been reluctant to allow their sovereignty to be limited in this way. The first known international court
5852-756: The EFTA Court and the Court of Justice of the Andean Community . Interstate arbitration can also be used to resolve disputes between states, leading in 1899 to the creation of the Permanent Court of Arbitration which facilitates the process by maintaining a list of arbitrators. This process was used in the Island of Palmas case and to resolve disputes during the Eritrean-Ethiopian war . The ICJ operates as one of
5985-467: The Hague and Geneva Conventions , the first of which was passed in 1864. Colonial expansion by European powers reached its peak in the late 19th century and its influence began to wane following the unprecedented bloodshed of World War I , which spurred the creation of international organisations. Right of conquest was generally recognized as international law before World War II . The League of Nations
6118-604: The Hague Convention on the Recognition and Enforcement of Foreign Judgments in Civil and Commercial Matters and the Brussels Regulations . These treaties codified practice on the enforcement of international judgments, stating that a foreign judgment would be automatically recognised and enforceable where required in the jurisdiction where the party resides, unless the judgement was contrary to public order or conflicted with
6251-459: The Hobbesian notion that the state of nature was one of war and conflict, arguing that the natural state of the world is actually peaceful but weak and uncertain without adherence to the law of nations. The actions of a state consist of nothing more than the sum of the individuals within that state, thereby requiring the state to apply a fundamental law of reason, which is the basis of natural law. He
6384-700: The Holy See were the sole subjects of international law. With the proliferation of international organisations over the last century, they have also been recognised as relevant parties. One definition of international organisations comes from the ILC's 2011 Draft Articles on the Responsibility of International Organizations which in Article 2(a) states that it is "an organization established by treaty or other instrument governed by international law and possessing its own international legal personality". This definition functions as
6517-461: The Indian subcontinent was divided into various states, which over time developed rules of neutrality, treaty law , and international conduct, and established both temporary and permanent embassies . Following the collapse of the western Roman Empire in the fifth century CE, Europe fragmented into numerous often-warring states for much of the next five centuries. Political power was dispersed across
6650-663: The International Bank for Reconstruction and Development (World Bank) to the World Health Organization furthered the development of a multilateralist approach as states chose to compromise on sovereignty to benefit from international cooperation. Since the 1980s, there has been an increasing focus on the phenomenon of globalisation and on protecting human rights on the global scale, particularly when minorities or indigenous communities are involved, as concerns are raised that globalisation may be increasing inequality in
6783-712: The International Covenant on Economic, Social and Cultural Rights (ICESCR). These two documents along with the UDHR are considered the International Bill of Human Rights . Non-domestic human rights enforcement operates at both the international and regional levels. Established in 1993, the Office of the UN High Commissioner for Human Rights supervises Charter-based and treaty-based procedures. The former are based on
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#17330844892136916-513: The Laws of Wisby , enacted among the mercantile city-states of the Hanseatic League . However, the earliest known formulation of public international law of the sea was in 17th century Europe, which saw unprecedented navigation, exploration, and trade across the world's oceans. Portugal and Spain led this trend, staking claims over both the land and sea routes they discovered. Spain considered
7049-476: The League of Nations called conference at The Hague , but no agreements resulted. By the mid 20th century, technological improvements in fishing and oil exploration expanded the nautical range in which countries could detect and exploit natural resources. This prompted United States President Harry S. Truman in 1945 to extend American jurisdiction to all the natural resources of its continental shelf , well beyond
7182-631: The Pacific Ocean a mare clausum — literally a "closed sea" off limits to other naval powers—in part to protect its possessions in Asia . Similarly, as the only known entrance from the Atlantic, the Strait of Magellan was periodically patrolled by Spanish fleets to prevent entrance by foreign vessels. The papal bull Romanus Pontifex (1455) recognized Portugal's exclusive right to navigation, trade, and fishing in
7315-584: The Rio Declaration of 1972. Despite these, and other, multilateral environmental agreements covering specific issues, there is no overarching policy on international environmental protection or one specific international organisation, with the exception of the UN Environmental Programme . Instead, a general treaty setting out the framework for tackling an issue has then been supplemented by more specific protocols. Climate change has been one of
7448-637: The Rolls of Oléron — aimed at regulating shipping in North-western Europe — and the later Laws of Wisby , enacted among the commercial Hanseatic League of northern Europe and the Baltic region . In the Islamic world , Muhammad al-Shaybani published Al-Siyar Al-Kabīr in the eighth century, which served as a fundamental reference work for siyar , a subset of Sharia law , which governed foreign relations. This
7581-550: The UN Commission on Human Rights in 1946, which developed the Universal Declaration of Human Rights (UDHR), which established non-binding international human rights standards, for work, standards of living, housing and education, non-discrimination, a fair trial and prohibition of torture. Two further human rights treaties were adopted by the UN in 1966, the International Covenant on Civil and Political Rights (ICCPR) and
7714-612: The carriage of goods by sea , rights of salvage , ship collisions , and marine insurance . Among the earliest examples of legal codes concerning maritime affairs is the Byzantine Lex Rhodia , promulgated between 600 and 800 C.E. to govern trade and navigation in the Mediterranean. Maritime law codes were also created during the European Middle Ages , such as the Rolls of Oléron , which drew from Lex Rhodia , and
7847-407: The thalweg doctrine or the rule of thalweg ) is the legal principle that if the boundary between two political entities is stated to be a waterway without further description ( e.g. , a median line, right bank, eastern shore, low-tide line, etc.), the boundary follows the thalweg of that watercourse. A thalweg is the center of the principal navigable channel of the waterway (which is presumed to be
7980-458: The "law of nations", which unlike its eponymous Roman predecessor, applied natural law to relations between states. In Islam, a similar framework was developed wherein the law of nations was derived, in part, from the principles and rules set forth in treaties with non-Muslims. The 15th century witnessed a confluence of factors that contributed to an accelerated development of international law. Italian jurist Bartolus de Saxoferrato (1313–1357)
8113-411: The EEZ, even by military vessels, provided they do no harm to the country or break any of its laws. The convention came into force on 16 November 1994, one year after it was ratified by the 60th state, Guyana ; the four treaties concluded in the first UN Conference in 1956 were consequently superseded. As of June 2019, UNCLOS has been ratified by 168 states. Many of the countries that have not ratified
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#17330844892138246-724: The Greek concept of natural law , the Romans conceived of jus gentium as being universal. However, in contrast to modern international law, the Roman law of nations applied to relations with and between foreign individuals rather than among political units such as states. Beginning with the Spring and Autumn period of the eighth century BCE, China was divided into numerous states that were often at war with each other. Rules for diplomacy and treaty-making emerged, including notions regarding just grounds for war ,
8379-463: The ICJ has set a high bar for enforcement in the cases of Anglo-Norwegian Fisheries and North Sea Continental Shelf . There has been legal debate on this topic with the only prominent view on the length of time necessary to establish custom explained by Humphrey Waldock as varying "according to the nature of the case". The practice is not required to be followed universally by states, but there must be
8512-554: The UDHR was drafted, although many countries in the Global South have led the development of human rights on the global stage in the intervening decades. International labour law is generally defined as "the substantive rules of law established at the international level and the procedural rules relating to their adoption and implementation". It operates primarily through the International Labor Organization (ILO),
8645-711: The UN Law of the Sea concerning the offshore boundary between Guyana and Suriname , in which the thalweg of the Courantyne River played a role in the ruling. In the 20th century dispute between the USSR and China (PRC) over Zhenbao Island , China held that the Thalweg principle supported their position. The doctrine is also applied to sub-national boundaries, such as those between American states. International law International law (also known as public international law and
8778-577: The UN Charter and operate under the UN Human Rights Council , where each global region is represented by elected member states. The Council is responsible for Universal Periodic Review , which requires each UN member state to review its human rights compliance every four years, and for special procedures, including the appointment of special rapporteurs , independent experts and working groups. The treaty-based procedure allows individuals to rely on
8911-444: The UN Charter or international treaties, although in practice there are no relevant matters in the UN Charter. The ICJ may also be asked by an international organisation to provide an advisory opinion on a legal question, which are generally considered non-binding but authoritative. Conflict of laws , also known as private international law, was originally concerned with choice of law , determining which nation's laws should govern
9044-612: The choice as to whether or not to ratify and implement these standards. The secretariat of the ILO is the International Labour Office, which can be consulted by states to determine the meaning of a convention, which forms the ILO's case law. Although the Right to Organise Convention does not provide an explicit right to strike, this has been interpreted into the treaty through case law. The UN does not specifically focus on international labour law, although some of its treaties cover
9177-457: The common consent of these states" and this definition has been largely adopted by international legal scholars. There is a distinction between public and private international law ; the latter is concerned with whether national courts can claim jurisdiction over cases with a foreign element and the application of foreign judgments in domestic law, whereas public international law covers rules with an international origin. The difference between
9310-436: The competence of the organisation; and an administrative organ, to execute the decisions of the other organs and handle secretarial duties. International organisations will typically provide for their privileges and immunity in relation to its member states in their constitutional documents or in multilateral agreements, such as the Convention on the Privileges and Immunities of the United Nations . These organisations also have
9443-452: The concept and formation of nation-states. Elements of the naturalist and positivist schools were synthesised, notably by German philosopher Christian Wolff (1679–1754) and Swiss jurist Emer de Vattel (1714–1767), both of whom sought a middle-ground approach. During the 18th century, the positivist tradition gained broader acceptance, although the concept of natural rights remained influential in international politics, particularly through
9576-518: The conduct of warfare during the American Civil War , and is noted for codifying rules and articles of war adhered to by nations across the world, including the United Kingdom, Prussia, Serbia and Argentina. In the years that followed, numerous other treaties and bodies were created to regulate the conduct of states towards one another, including the Permanent Court of Arbitration in 1899, and
9709-402: The deepest part). If there are multiple navigable channels in a river, the one principally used for downstream travel (likely having the strongest current) is used. The definition has been used in specific descriptions as well. The Treaty of Versailles , for example, specifies that "In the case of boundaries which are defined by a [navigable] waterway" the boundary is to follow "the median line of
9842-481: The determination of rules of law". It was originally considered that the arrangement of the sources sequentially would suggest an implicit hierarchy of sources; however, the statute does not provide for a hierarchy and other academics have argued that therefore the sources must be equivalent. General principles of law have been defined in the Statute as "general principles of law recognized by civilized nations" but there
9975-408: The efficiency of the procedures themselves. Legal territory can be divided into four categories. There is territorial sovereignty which covers land and territorial sea, including the airspace above it and the subsoil below it, territory outside the sovereignty of any state, res nullius which is not yet within territorial sovereignty but is territory that is legally capable of being acquired by
10108-436: The exception of states who have been persistent objectors during the process of the custom being formed and special or local forms of customary law. The requirement for state practice relates to the practice, either through action or failure to act, of states in relation to other states or international organisations. There is no legal requirement for state practice to be uniform or for the practice to be long-running, although
10241-502: The focus was on the relationship between states. As human rights have become more important on the global stage, being codified by the UN General Assembly (UNGA) in the Universal Declaration of Human Rights in 1948, individuals have been given the power to defend their rights to judicial bodies. International law is largely silent on the issue of nationality law with the exception of cases of dual nationality or where someone
10374-745: The implementation or integration of international legal obligations into domestic law. The modern term "international law" was originally coined by Jeremy Bentham in his 1789 book Introduction to the Principles of Morals and Legislation to replace the older law of nations, a direct translation of the late medieval concepts of ius gentium , used by Hugo Grotius , and droits des gens , used by Emer de Vattel . The definition of international law has been debated; Bentham referred specifically to relationships between states which has been criticised for its narrow scope. Lassa Oppenheim defined it in his treatise as "a law between sovereign and equal states based on
10507-428: 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". Where customary or treaty law conflicts with a peremptory norm, it will be considered invalid, but there is no agreed definition of jus cogens . Academics have debated what principles are considered peremptory norms but
10640-560: The international legal system. The sources of international law applied by the community of nations are listed in Article 38(1) of the Statute of the International Court of Justice , which is considered authoritative in this regard. These categories are, in order, international treaties , customary international law , general legal principles and judicial decisions and the teachings of prominent legal scholars as "a subsidiary means for
10773-520: The international seabed area beyond territorial limits. UNCLOS established the International Tribunal for the Law of the Sea (ITLOS), based in Hamburg, Germany, to adjudicate all disputes concerning the interpretation or application of the convention (subject to the provisions of Article 297 and to the declarations made in accordance with article 298 of the convention). Its 21 judges are drawn from
10906-596: The law of nations ) is the set of rules , norms, and standards that states and other actors feel an obligation to obey in their mutual relations and generally do obey. In international relations, actors are simply the individuals and collective entities, such as states, international organizations , and non-state groups, which can make behavioral choices, whether lawful or unlawful. Rules are formal, often written expectations for behavior and norms are less formal, customary expectations about appropriate behavior that are frequently unwritten. It establishes norms for states across
11039-498: The law of war and towards the domains such as the law of the sea and commercial treaties. The positivist school grew more popular as it reflected accepted views of state sovereignty and was consistent with the empiricist approach to philosophy that was then gaining acceptance in Europe. The developments of the 17th century culminated at the conclusion of the Peace of Westphalia in 1648, which
11172-443: The laws of war and treaties. Francisco de Vitoria (1486–1546), who was concerned with the treatment of indigenous peoples by Spain, invoked the law of nations as a basis for their innate dignity and rights, articulating an early version of sovereign equality between peoples. Francisco Suárez (1548–1617) emphasised that international law was founded upon natural law and human positive law. Dutch jurist Hugo Grotius (1583–1645)
11305-421: The most important and heavily debated topics in recent environmental law. The United Nations Framework Convention on Climate Change , intended to set out a framework for the mitigation of greenhouse gases and responses to resulting environmental changes, was introduced in 1992 and came into force two years later. As of 2023, 198 states were a party. Separate protocols have been introduced through conferences of
11438-427: The mostly widely agreed is the principle of non-use of force. The next year, the ICJ defined erga omnes obligations as those owed to "the international community as a whole", which included the illegality of genocide and human rights. There are generally two approaches to the relationship between international and national law, namely monism and dualism. Monism assumes that international and national law are part of
11571-512: The nation state, although some academics emphasise that it is distinct from either type of law. It was defined by Philip Jessup as "all law which regulates actions or events that transcend national frontiers". A more recent concept is supranational law , which was described in a 1969 paper as "[a] relatively new word in the vocabulary of politics". Systems of supranational law arise when nations explicitly cede their right to make decisions to this system's judiciary and legislature, which then have
11704-400: The naturalists and the positivists. In the former camp was German jurist Samuel von Pufendorf (1632–1694), who stressed the supremacy of the law of nature over states. His 1672 work, Of the Law of Nature and Nations, expanded on the theories of Grotius and grounded natural law to reason and the secular world, asserting that it regulated only external acts of states. Pufendorf challenged
11837-460: The nine primary human rights treaties: The regional human rights enforcement systems operate in Europe, Africa and the Americas through the European Court of Human Rights , the Inter-American Court of Human Rights and the African Court on Human and Peoples' Rights . International human rights has faced criticism for its Western focus, as many countries were subject to colonial rule at the time that
11970-625: The parties , including the Kyoto Protocol which was introduced in 1997 to set specific targets for greenhouse gas reduction and the 2015 Paris Agreement which set the goal of keeping global warming at least below 2 °C (3.6 °F) above pre-industrial levels. Individuals and organisations have some rights under international environmental law as the Aarhus Convention in 1998 set obligations on states to provide information and allow public input on these issues. However few disputes under
12103-475: The parties must be states, however international organisations are also considered to have the capacity to enter treaties. Treaties are binding through the principle of pacta sunt servanda , which allows states to create legal obligations on themselves through consent. The treaty must be governed by international law; however it will likely be interpreted by national courts. The VCLT, which codifies several bedrock principles of treaty interpretation, holds that
12236-405: The parties must sign to indicate acceptance of the wording but there is no requirement on a state to later ratify the treaty, although they may still be subject to certain obligations. When signing or ratifying a treaty, a state can make a unilateral statement to negate or amend certain legal provisions which can have one of three effects: the reserving state is bound by the treaty but the effects of
12369-507: The point of view of navigation or of fisheries. Writing in response to Grotius, the English jurist John Selden argued in Mare Clausum that the sea was as capable of appropriation by sovereign powers as terrestrial territory. Rejecting Grotius' premise, Selden claimed there was no historical basis for the sea to be treated differently than land, nor was there anything inherent in the nature of
12502-475: The possibility of groups of nation-states dominating the negotiations, the conference used a consensus process rather than majority vote. With more than 160 nations participating, the conference lasted until 1982, resulting in the UN Convention of the Law of the Sea, also known as the Law of the Sea Treaty, which defines the rights and responsibilities of nations in their use of the world's oceans. UNCLOS introduced
12635-478: The power to enter treaties, using the Vienna Convention on the Law of Treaties between States and International Organizations or between International Organizations as a basis although it is not yet in force. They may also have the right to bring legal claims against states depending, as set out in Reparation for Injuries , where they have legal personality and the right to do so in their constitution. The UNSC has
12768-400: The power under Chapter VII of the UN Charter to take decisive and binding actions against states committing "a threat to the peace, breach of the peace, or an act of aggression" for collective security although prior to 1990, it has only intervened once, in the case of Korea in 1950. This power can only be exercised, however, where a majority of member states vote for it, as well as receiving
12901-647: The principal channel of navigation." The precise drawing of river boundaries has been important on countless occasions. Notable examples include the Shatt al-Arab between Iraq and Iran , the Danube in central Europe ( Croatia–Serbia border dispute ), the Kasikili/Sedudu Island dispute between Namibia and Botswana (settled by the International Court of Justice in 1999), and the 2004 dispute settlement under
13034-430: The principle that the sea was international territory and that all nations were thus free to use it for trade. He premised this argument on the idea that "every nation is free to travel to every other nation, and to trade with it." Thus, there was a right to innocent passage over land and a similar right of innocent passage at sea. Grotius observed that unlike land, on which sovereigns could demarcate their jurisdiction,
13167-417: The regimes set out in environmental agreements are referred to the ICJ, as the agreements tend to specify their compliance procedures. These procedures generally focus on encouraging the state to once again become compliant through recommendations but there is still uncertainty on how these procedures should operate and efforts have been made to regulate these processes although some worry that this will undercut
13300-415: The relevant provisions are precluded or changes, the reserving state is bound by the treaty but not the relevant provisions, or the reserving state is not bound by the treaty. An interpretive declaration is a separate process, where a state issues a unilateral statement to specify or clarify a treaty provision. This can affect the interpretation of the treaty but it is generally not legally binding. A state
13433-509: The republican revolutions of the United States and France. Until the mid-19th century, relations between states were dictated mostly by treaties, agreements between states to behave in a certain way, unenforceable except by force, and nonbinding except as matters of honour and faithfulness. One of the first instruments of modern armed conflict law was the Lieber Code of 1863, which governed
13566-476: The right to make laws that are directly effective in each member state. This has been described as "a level of international integration beyond mere intergovernmentalism yet still short of a federal system". The most common example of a supranational system is the European Union . With origins tracing back to antiquity , states have a long history of negotiating interstate agreements. An initial framework
13699-579: The rights of neutral parties, and the consolidation and partition of states; these concepts were sometimes applied to relations with barbarians along China's western periphery beyond the Central Plains . The subsequent Warring States period saw the development of two major schools of thought, Confucianism and Legalism , both of which held that the domestic and international legal spheres were closely interlinked, and sought to establish competing normative principles to guide foreign relations. Similarly,
13832-561: The running water source intact. Placement of boulders along a thalweg and the creation of instream sills makes drying up rarer and less severe during late summer, and abates cases of severe sediment erosion and deposit in the spring and fall months when the flow rates are high, particularly if those rates have increased. Such partial infilling of a thalweg was prototyped in Meacham Creek in Umatilla, Oregon . The thalweg principle (also known as
13965-562: The same legal order. Therefore, a treaty can directly become part of national law without the need for enacting legislation, although they will generally need to be approved by the legislature. Once approved, the content of the treaty is considered as a law that has a higher status than national laws. Examples of countries with a monism approach are France and the Netherlands. The dualism approach considers that national and international law are two separate legal orders, so treaties are not granted
14098-403: The same topics. Many of the primary human rights conventions also form part of international labour law, providing protection in employment and against discrimination on the grounds of gender and race. It has been claimed that there is no concept of discrete international environmental law , with the general principles of international law instead being applied to these issues. Since the 1960s,
14231-406: The sea , explicitly providing that the oceans are open to all states, with no state being able to subject any part to its sovereignty. Consequently, state parties cannot unilaterally extend their sovereignty beyond their EEZ, the 200 nautical miles in which that state has exclusive rights to fisheries, minerals, and sea-floor deposits. "Innocent passage" is permitted through both territorial waters and
14364-519: The sea from land. This was aided by the compromise position presented by Dutch legal theorist Cornelius Bynkershoek , who in De dominio maris (1702), established the principle that maritime dominion was limited to the distance within which cannons could effectively protect it. Grotius' concept of " freedom of the seas " became virtually universal through the 20th century, following the global dominance of European naval powers. National rights and jurisdiction over
14497-436: The sea that precluded states from exercising dominion over parts of it. In essence, international law could evolve to accommodate the emerging framework of national jurisdiction over the sea. As a growing number of nations began to expand their naval presence across the world, conflicting claims over the open sea mounted. This prompted maritime states to moderate their stance and to limit the extent of their jurisdiction towards
14630-399: The sea was akin to air, a common property of all: The air belongs to this class of things for two reasons. First, it is not susceptible of occupation; and second its common use is destined for all men. For the same reasons the sea is common to all, because it is so limitless that it cannot become a possession of any one, and because it is adapted for the use of all, whether we consider it from
14763-558: The sea was primarily composed of customary law until the 20th century, beginning with the League of Nations Codification Conference in 1930, the UN Conference on the Law of the Sea and the adoption of the UNCLOS in 1982. The UNCLOS was particularly notable for making international courts and tribunals responsible for the law of the sea. Law of the Sea Law of the sea (or ocean law )
14896-501: The seas near discovered land, and on this basis the Portuguese claimed a monopoly on East Indian trade, prompting opposition and conflict from other European naval powers. Amid growing competition over sea trade, Dutch jurist and philosopher Hugo Grotius —considered the father of international law generally—wrote Mare Liberum ( The Freedom of the Seas ), published in 1609, which set forth
15029-572: The seas were limited to a specified belt of water extending from a nation's coastlines , usually three nautical miles (5.6 km), according to Bynkershoek's " cannon shot" rule. Under the mare liberum principle, all waters beyond national boundaries were considered international waters : Free to all nations, but belonging to none of them. In the early 20th century, some nations expressed their desire to extend national maritime claims, namely to exploit mineral resources, protect fish stocks , and enforce pollution controls . To that end, in 1930,
15162-469: The sick and wounded. During the European Middle Ages , international law was concerned primarily with the purpose and legitimacy of war, seeking to determine what constituted "just war ". The Greco-Roman concept of natural law was combined with religious principles by Jewish philosopher Maimonides (1135–1204) and Christian theologian Thomas Aquinas (1225–1274) to create the new discipline of
15295-550: The six organs of the UN, based out of the Hague with a panel of fifteen permanent judges. It has jurisdiction to hear cases involving states but cannot get involved in disputes involving individuals or international organizations. The states that can bring cases must be party to the Statute of the ICJ , although in practice most states are UN members and would therefore be eligible. The court has jurisdiction over all cases that are referred to it and all matters specifically referred to in
15428-515: The support of the permanent five members of the UNSC. This can be followed up with economic sanctions, military action, and similar uses of force. The UNSC also has a wide discretion under Article 24, which grants "primary responsibility" for issues of international peace and security. The UNGA, concerned during the Cold War with the requirement that the USSR would have to authorise any UNSC action, adopted
15561-472: The teleological approach which interprets a treaty according to its objective and purpose. A state must express its consent to be bound by a treaty through signature, exchange of instruments, ratification, acceptance, approval or accession. Accession refers to a state choosing to become party to a treaty that it is unable to sign, such as when establishing a regional body. Where a treaty states that it will be enacted through ratification, acceptance or approval,
15694-417: The territorial waters of the country. Truman's proclamation cited the customary international law principle of a nation's right to protect its natural resources. Other nations quickly followed suit: Between 1946 and 1950, Chile, Peru, and Ecuador extended their rights to a distance of 200 nautical miles (370 km) to cover their Humboldt Current fishing grounds. The first attempt to promulgate and codify
15827-425: The thalweg is a line drawn to join the lowest points along the length of a stream bed or valley in its downward slope, defining its deepest channel. The thalweg thus marks the natural direction (the profile) of a watercourse. The term is sometimes used to refer to a subterranean stream that percolates under the surface and in the same general direction as the surface stream. Slowing stream-bed erosion by bouldering
15960-403: The treaty contradicts peremptory norms. Customary international law requires two elements: a consistent practice of states and the conviction of those states that the consistent practice is required by a legal obligation, referred to as opinio juris . Custom distinguishes itself from treaty law as it is binding on all states, regardless of whether they have participated in the practice, with
16093-483: The treaty, such as the U.S., nonetheless recognize its provisions as reflective of international customary law. Thus, it remains the most widely recognized and followed source of international law with respect to the sea. Between 2018 and 2020, there is a conference on a possible change to the law of the sea regarding conservation and sustainable use of marine biological diversity of areas beyond national jurisdiction (General Assembly resolution 72/249). Although UNCLOS
16226-434: The two areas of law has been debated as scholars disagree about the nature of their relationship. Joseph Story , who originated the term "private international law", emphasised that it must be governed by the principles of public international law but other academics view them as separate bodies of law. Another term, transnational law, is sometimes used to refer to a body of both national and international rules that transcend
16359-464: The world, from the eastern Mediterranean to East Asia . In Ancient Greece , many early peace treaties were negotiated between its city-states and, occasionally, with neighbouring states. The Roman Empire established an early conceptual framework for international law, jus gentium , which governed the status of foreigners living in Rome and relations between foreigners and Roman citizens . Adopting
16492-585: Was among the earliest scholars to expand international law beyond European Christian nations, advocating for its application and recognition among all peoples on the basis of shared humanity. In contrast, positivist writers, such as Richard Zouche (1590–1661) in England and Cornelis van Bynkershoek (1673–1743) in the Netherlands, argued that international law should derive from the actual practice of states rather than Christian or Greco-Roman sources. The study of international law shifted away from its core concern on
16625-567: Was based on the division of the world into three categories: the dar al-Islam , where Islamic law prevailed; the dar al-sulh , non-Islamic realms that concluded an armistice with a Muslim government; and the dar al-harb , non-Islamic lands which were contested through jihad . Islamic legal principles concerning military conduct served as precursors to modern international humanitarian law and institutionalised limitations on military conduct, including guidelines for commencing war, distinguishing between civilians and combatants and caring for
16758-734: Was conceptualised by the Ancient Romans and this idea of ius gentium has been used by various academics to establish the modern concept of international law. Among the earliest recorded examples are peace treaties between the Mesopotamian city-states of Lagash and Umma (approximately 3100 BCE), and an agreement between the Egyptian pharaoh , Ramesses II , and the Hittite king , Ḫattušili III , concluded in 1279 BCE. Interstate pacts and agreements were negotiated and agreed upon by polities across
16891-476: Was considered the founder of private international law . Another Italian jurist, Baldus de Ubaldis (1327–1400), provided commentaries and compilations of Roman, ecclesiastical, and feudal law , creating an organised source of law that could be referenced by different nations. Alberico Gentili (1552–1608) took a secular view to international law, authoring various books on issues in international law, notably Law of War , which provided comprehensive commentary on
17024-533: Was created under the auspices of the UN, the organization has no direct operational role in its implementation. However, a specialized agency of the UN, the International Maritime Organization , plays a role in monitoring and enforcing certain provisions of the convention, along with the intergovernmental International Seabed Authority (ISA) , which was established by the convention to organize, regulate and control all mineral-related activities in
17157-544: Was established in 1947 to develop and codify international law. In the 1940s through the 1970s, the dissolution of the Soviet bloc and decolonisation across the world resulted in the establishment of scores of newly independent states. As these former colonies became their own states, they adopted European views of international law. A flurry of institutions, ranging from the International Monetary Fund (IMF) and
17290-583: Was founded to safeguard peace and security. International law began to incorporate notions such as self-determination and human rights . The United Nations (UN) was established in 1945 to replace the League, with an aim of maintaining collective security. A more robust international legal order followed, buttressed by institutions such as the International Court of Justice (ICJ) and the UN Security Council (UNSC). The International Law Commission (ILC)
17423-470: Was originally an intention that a state must have self-determination , but now the requirement is for a stable political environment. The final requirement of being able to enter relations is commonly evidenced by independence and sovereignty. Under the principle of par in parem non habet imperium , all states are sovereign and equal, but state recognition often plays a significant role in political conceptions. A country may recognise another nation as
17556-540: Was the Central American Court of Justice , prior to World War I, when the Permanent Court of International Justice (PCIJ) was established. The PCIJ was replaced by the ICJ, which is the best known international court due to its universal scope in relation to geographical jurisdiction and subject matter . There are additionally a number of regional courts, including the Court of Justice of the European Union ,
17689-498: Was widely considered a success, it left open the important issue of the extent of territorial waters. In 1960, the UN held a second Conference on the Law of the Sea ("UNCLOS II"), but this did not result in any new agreements. The pressing issue of varying claims of territorial waters was raised at the UN in 1967 by Malta, prompting in 1973 a third United Nations Conference on the Law of the Sea in New York City. In an attempt to reduce
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