The European Union (EU) is a supranational political and economic union of 27 member states that are located primarily in Europe. The union has a total area of 4,233,255 km2 (1,634,469 sq mi) and an estimated total population of over 448 million. The EU has often been described as a sui generis political entity combining the characteristics of both a federation and a confederation.
Jurisdiction is the legal term for the legal authority granted to a legal entity to enact justice. In federations like the United States, areas of jurisdiction apply to local, state, and federal levels.
Conflict of laws is the set of rules or laws a jurisdiction applies to a case, transaction, or other occurrence that has connections to more than one jurisdiction. This body of law deals with three broad topics: jurisdiction, rules regarding when it is appropriate for a court to hear such a case; foreign judgments, dealing with the rules by which a court in one jurisdiction mandates compliance with a ruling of a court in another jurisdiction; and choice of law, which addresses the question of which substantive laws will be applied in such a case. These issues can arise in any private-law context, but they are especially prevalent in contract law and tort law.
Pacta sunt servanda, Latin for "agreements must be kept", is a brocard and a fundamental principle of law. According to Hans Wehberg, a professor of international law, "few rules for the ordering of Society have such a deep moral and religious influence" as this principle.
A treaty is a formal, legally binding written agreement between actors in international law. It is usually made by and between sovereign states, but can include international organizations, individuals, business entities, and other legal persons. A treaty may also be known as an international agreement, protocol, covenant, convention, pact, or exchange of letters, among other terms. However, only documents that are legally binding on the parties are considered treaties under international law. Treaties vary on the basis of obligations, precision, and delegation.
The law of war is the component of international law that regulates the conditions for initiating war and the conduct of warring parties. Laws of war define sovereignty and nationhood, states and territories, occupation, and other critical terms of law.
The Vienna Convention on the Law of Treaties (VCLT) is an international agreement that regulates treaties among sovereign states; the VCLT is a codification of customary international law and state practice concerning treaties.
International humanitarian law (IHL), also referred to as the laws of armed conflict, is the law that regulates the conduct of war. It is a branch of international law that seeks to limit the effects of armed conflict by protecting persons who are not participating in hostilities and by restricting and regulating the means and methods of warfare available to combatants.
International law, also known as "law of nations", refers to the 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.
The Vienna Convention on Consular Relations is an international treaty that defines a framework for consular relations between sovereign states. It codifies many consular practices that originated from state custom and various bilateral agreements between states.
International criminal law (ICL) is a body of public international law designed to prohibit certain categories of conduct commonly viewed as serious atrocities and to make perpetrators of such conduct criminally accountable for their perpetration. The core crimes under international law are genocide, war crimes, crimes against humanity, and the crime of aggression.
An International Driving Permit (IDP), often referred to as an international driving license, is a translation of a domestic driving license that allows the holder to drive a private motor vehicle in any country or jurisdiction that recognises the document. The term International Driving Permit was first mentioned in the document prescribed in the International Convention relative to Motor Traffic that was signed at Paris in 1926, and is a translation of the French 'permis de conduire international', or 'international driving license'. The Paris treaty, and all subsequent, use the word 'permit' exclusively in relation to all kinds of driving license.
Diplomatic law is that area of international law that governs permanent and temporary diplomatic missions. A fundamental concept of diplomatic law is that of diplomatic immunity, which derives from state immunity.
A reservation in international law is a caveat to a state's acceptance of a treaty. A reservation is defined by the 1969 Vienna Convention on the Law of Treaties (VCLT) as:
a unilateral statement, however phrased or named, made by a State, when signing, ratifying, accepting, approving or acceding to a treaty, whereby it purports to exclude or to modify the legal effect of certain provisions of the treaty in their application to that State.
International law is the set of guidelines, norms, and standards usually forming the default behavior between states. Inter means between thus outside of territories thus absent of sovereignty, thus isn't a law at all and is rather a common-practice between states - unless they wish otherwise due to their own reasoning. It establishes normative guidelines and a common conceptual framework for states across a broad range of domains, including war and diplomacy, economic relations, and human rights. International law differs from state-based domestic legal systems in being primarily, though not exclusively, applicable to states, rather than to individuals, and operates largely through consent, since there is no universally accepted authority to enforce it upon sovereign states - because it is non-territorial thus unsovereign. States may choose to not abide by international law, and even to breach 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 terms monism and dualism are used to describe two different theories of the relationship between international law and domestic law. Many states, perhaps most, are partly monist and partly dualist in their actual application of international law in their national systems.
Medellín v. Texas, 552 U.S. 491 (2008), was a decision of the United States Supreme Court that held even when a treaty constitutes an international commitment, it is not binding domestic law unless it has been implemented by an act of the U.S. Congress or contains language expressing that it is "self-executing" upon ratification. The Court also ruled that decisions of the International Court of Justice are not binding upon the U.S. and, like treaties, cannot be enforced by the president without authority from Congress or the U.S. Constitution.
The Geneva Conventions are four treaties, and three additional protocols, that establish international legal standards for humanitarian treatment in war. The singular term Geneva Convention usually denotes the agreements of 1949, negotiated in the aftermath of the Second World War (1939–1945), which updated the terms of the two 1929 treaties and added two new conventions. The Geneva Conventions extensively define the basic rights of wartime prisoners, civilians and military personnel, established protections for the wounded and sick, and provided protections for the civilians in and around a war-zone.
A sovereign state is a state that has the highest authority over a territory. International law defines sovereign states as having a permanent population, defined territory, a government not under another, and the capacity to interact with other sovereign states. It is commonly understood that a sovereign state is independent. A sovereign state can exist without being recognised by other sovereign states, however unrecognised states often have difficulty engaging in diplomatic relations with other sovereign states due to their lack of international recognition.
