A treaty is a formal, legally binding written agreement concluded by sovereign states in international law. International organizations can also be party to an international treaty. A treaty is binding under international law.
The Protocol for the Prohibition of the Use in War of Asphyxiating, Poisonous or other Gases, and of Bacteriological Methods of Warfare, usually called the Geneva Protocol, is a treaty prohibiting the use of chemical and biological weapons in international armed conflicts. It was signed at Geneva on 17 June 1925 and entered into force on 8 February 1928. It was registered in League of Nations Treaty Series on 7 September 1929. The Geneva Protocol is a protocol to the Convention for the Supervision of the International Trade in Arms and Ammunition and in Implements of War signed on the same date, and followed the Hague Conventions of 1899 and 1907.
The International Covenant on Civil and Political Rights (ICCPR) is a multilateral treaty that commits nations to respect the civil and political rights of individuals, including the right to life, freedom of religion, freedom of speech, freedom of assembly, electoral rights and rights to due process and a fair trial. It was adopted by United Nations General Assembly Resolution 2200A (XXI) on 16 December 1966 and entered into force on 23 March 1976 after its thirty-fifth ratification or accession. As of June 2024, the Covenant has 174 parties and six more signatories without ratification, most notably the People's Republic of China and Cuba; North Korea is the only state that has tried to withdraw.
The Outer Space Treaty, formally the Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, including the Moon and Other Celestial Bodies, is a multilateral treaty that forms the basis of international space law. Negotiated and drafted under the auspices of the United Nations, it was opened for signature in the United States, the United Kingdom, and the Soviet Union on 27 January 1967, entering into force on 10 October 1967. As of March 2024, 115 countries are parties to the treaty—including all major spacefaring nations—and another 22 are signatories.
Succession of states is a concept in international relations regarding a successor state that has become a sovereign state over a territory that was previously under the sovereignty of another state. The theory has its roots in 19th-century diplomacy. A successor state often acquires a new international legal personality, which is distinct from a continuing state, also known as a continuator or historical heir, which despite changes to its borders retains the same legal personality and possess all its existing rights and obligations.
The Vienna Convention on the Law of Treaties (VCLT) is an international agreement that regulates treaties among sovereign states.
The American Convention on Human Rights (ACHR), also known as the Pact of San José or by its Spanish name used in most of the signatory nations, Convención Americana sobre Derechos Humanos, is an international human rights instrument. It was adopted by many countries in the Western Hemisphere in San José, Costa Rica, on 22 November 1969. It came into force after the eleventh instrument of ratification was deposited on 18 July 1978.
Ratification is a principal's legal confirmation of an act of its agent. In international law, ratification is the process by which a state declares its consent to be bound to a treaty. In the case of bilateral treaties, ratification is usually accomplished by exchanging the requisite instruments, and in the case of multilateral treaties, the usual procedure is for the depositary to collect the ratifications of all states, keeping all parties informed of the situation.
Customary international law are international obligations arising from established or usual international practices, which are less formal customary expectations of behavior often unwritten as opposed to formal written treaties or conventions. Customary international law is an aspect of international law involving the principle of custom. Along with general principles of law and treaties, custom is considered by the International Court of Justice, jurists, the United Nations, and its member states to be among the primary sources of international law.
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 United Nations Convention on Contracts for the International Sale of Goods (CISG), sometimes known as the Vienna Convention, is a multilateral treaty that establishes a uniform framework for international commerce. As of December 2023, it has been ratified by 97 countries, representing two-thirds of world trade.
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.
A multilateral treaty or multilateral agreement is a treaty to which two or more sovereign states are parties. Each party owes the same obligations to all other parties, except to the extent that they have stated reservations. Examples of multilateral treaties include the Convention Relating to the Status of Refugees, the United Nations Convention on the Law of the Sea, the Geneva Conventions, and the Rome Statute of the International Criminal Court.
A bilateral treaty is a treaty strictly between two state entities. It is an agreement made by negotiations between two parties, established in writing and signed by representatives of the parties. Treaties can span in substance and complexity, regarding a wide variety of matters, such as territorial boundaries, trade and commerce, political alliances, and more. The agreement is usually then ratified by the lawmaking authority of each party or organization. Any agreement with more than two parties is a multilateral treaty. Similar to a contract, it is also called a contractual treaty. As with any other treaty, it is a written agreement that is typically formal and binding in nature.
The Convention on International Liability for Damage Caused by Space Objects, also known as the Space Liability Convention, is a treaty from 1972 that expands on the liability rules created in the Outer Space Treaty of 1967. In 1978, the crash of the nuclear-powered Soviet satellite Kosmos 954 in Canadian territory led to the only claim filed under the convention.
The Treaty Clause of the United States Constitution establishes the procedure for ratifying international agreements. It empowers the President as the primary negotiator of agreements between the United States and other countries, and holds that the advice and consent of a two-thirds supermajority of the Senate renders a treaty binding with the force of federal law.
The Convention on the Rights of Persons with Disabilities is an international human rights treaty of the United Nations intended to protect the rights and dignity of persons with disabilities. Parties to the convention are required to promote, protect, and ensure the full enjoyment of human rights by persons with disabilities and ensure that persons with disabilities enjoy full equality under the law. The Convention serves as a major catalyst in the global disability rights movement enabling a shift from viewing persons with disabilities as objects of charity, medical treatment and social protection towards viewing them as full and equal members of society, with human rights. The convention was the first U.N. human rights treaty of the twenty-first century.
The Hague Convention on the International Recovery of Child Support and Other Forms of Family Maintenance, also referred to as the Hague Maintenance Convention or the Hague Child Support Convention is a multilateral treaty governing the enforcement of judicial decisions regarding child support extraterritorially. It is one of a number of conventions in the area of private international law of the Hague Conference on Private International Law in 2007. The convention is open to all states as well as to Regional Economic Integration Organizations as long as they are composed of sovereign states only and have sovereignty in the content of the convention. The convention entered into force on 1 January 2013 between Norway and Albania, with Bosnia-Herzegovina (2013), Ukraine (2013), the European Union, Montenegro (2017), United States (2017), Turkey (2017), Kazakhstan (2017), Brazil (2017), Honduras (2017), Belarus (2018), Guyana (2020), Nicaragua (2020), United Kingdom (2021), Serbia (2021), New Zealand (2021), Ecuador (2022), Botswana (2022), Philippines (2022), Azerbaijan (2023) and Canada following suit. Because the EU acceptance of the convention applies in 26 EU countries, the convention applies in 47 countries worldwide.
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