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Vienna Convention on the Law of Treaties

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146: 31: 386:, the set of negotiating states that once agreed upon may sign and ratify the treaty is usually limited to its own member states, and non-member states may accede to it later. However, sometimes a specific set of non-member states or non-state actors may be invited to join negotiations. For example, the Council of Europe invited the "non-member States" 490:, and by any other State invited by the General Assembly of the United Nations to become a party to the Convention, as follows: until 30 November 1969, at the Federal Ministry for Foreign Affairs of the Republic of Austria, and subsequently, until 30 April 1970, at United Nations Headquarters, New York. 285: 234:
In the practices of international law, the Vienna Convention on the Law of Treaties is the legal authority about the formation and effects of a treaty. The legal standing of the VCLT is recognised by non-signator countries, such as the U.S. and India, as legally binding upon all sovereign states who
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The act of signing and ratifying a treaty as a negotiating state has the same effect as the act of acceding to a treaty (or "acceding a treaty") by a state that was not involved in its negotiation. Usually, accessions occur only after the treaty has entered into force, but the UN Secretary-General
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as "an international agreement concluded between states in written form and governed by international law", and affirms that "every state possesses the capacity to conclude treaties." Article 1 of the VCLT restricts the application of the convention to written treaties between states, excluding
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The Vienna Convention on the Law of Treaties was adopted and opened to signature on 23 May 1969, became effective on 27 January 1980, and has been ratified by 116 sovereign states as of January 2018. Non-ratifying parties, such as the U.S, have recognized parts of the VCLT as a restatement of
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to determine which entities are States. If the treaty is restricted to Members of the United Nations or Parties to the Statute of the International Court of Justice, there is no ambiguity. However, a difficulty has occurred as to possible participation in treaties when entities that appeared
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The Vienna Convention on the Law of Treaties (VCLT) was drafted by the International Law Commission (ILC) of the United Nations, which began work on the convention in 1949. During the 20 years of preparation, several draft versions of the convention and commentaries were prepared by
281:, or between international organizations, if any VCLT rules are independently binding upon such international organizations. In practise, Article 2 and Article 5 of the Vienna Convention apply to treaties between sovereign states and an intergovernmental organization. 367:. In rare cases, there is an explicit list of the entities that the treaty is restricted to. More commonly, the aim of the negotiating states (most or all of which usually end up becoming the founding signatories) is that the treaty is not restricted to particular 755: 180:
Known as the "treaty on treaties", the VCLT establishes comprehensive, operational guidelines, rules, and procedures for how treaties are drafted, defined, amended, and interpreted. An international treaty is a written agreement between countries subject to
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has stated that when the "any State" or "all States" formula is adopted, he would be able to implement it only if the General Assembly provided him with the complete list of the States coming within the formula, other than those falling within the "Vienna
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In 1966, the ILC adopted 75 draft articles, which formed the basis for its final work. Over two sessions in 1968 and 1969, the Vienna Conference completed the convention, which was adopted on 22 May 1969 and opened for signature on the following day.
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ILC, Fragmentation of international law: difficulties arising from the diversification and expansion of international law, Report A/CN.4/L.682 (presented at the 58th session in Geneva, 1 May – 9 June and 3 July – 11 August 2006) 89, para
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has occasionally accepted accessions even before a treaty went into force. The only downside of not being a negotiating state is that one has no influence over the contents of a treaty, but one is still allowed to declare
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if it enters into force. Furthermore, in treaties between states and international organizations, the terms of the Convention still apply between the state members. The Convention does not apply to unwritten agreements.
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The Vienna Convention applies only to treaties agreed after the VCLT was ratified, and to treaties agreed between sovereign states, but does not govern other agreements between sovereign states and
451:. Accordingly, to allow for as wide a participation as possible, several conventions then provided that they were also open for participation to state members of specialized agencies. The type of 243:
treaties concluded between the states and international organizations or between international organizations. Article 11 defines "means of expressing consent to be bound by a treaty" including
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otherwise to be States could not be admitted to the United Nations or become Parties to the Statute of the International Court of Justice because of the opposition for political reasons of a
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Articles 31-33 of the VCLT entail principles for interpreting conventions, treaties, etc. These principles are recognized as representing customary international law, for example by the
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The interpretational principles codified in Article 31 are to be used before applying those of Article 32, which explicitly states that it offers supplementary means of interpretation.
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As of January 2018, there are 116 state parties that have ratified the convention, and a further 15 states have signed but have not ratified the convention. In addition, the
1161: 1721: 1231: 483: 364: 1055:-term" of article 218 (1) of UNCLOS following article 31 of the VCLT to allow the term to encompass emissions has also been discussed. See Jesper Jarl Fanø (2019) 1516: 1396: 614: 1261: 1781: 1661: 462:
Some treaties that use it include provisions that in addition to these States any other State invited by a specified authority or organization (commonly the
447:, on which there is no "veto" procedure, a number of those States became members of specialized agencies and so were in essence recognized as States by the 919:
All States are defined as all UN member states and states about which there are individual statements of inclusion by the UN Secretary-General or other
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However, agreements between states and international organizations or between international organizations themselves are governed by the 1986
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clause used in the Vienna Convention on the Law of Treaties was later called the "Vienna formula," and various treaties, conventions and
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that stipulates their consent to the creation, alteration, or termination of their rights and obligations, as stipulated in the treaty.
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or an institution created by the treaty in question) can also participate, thus making the scope of potential signatories even broader.
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Vienna Convention on the Law of Treaties between States and International Organizations or Between International Organizations
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or have not applied for ICJ or UN membership. Since that difficulty did not arise as concerns membership in
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Practical Aspects of Treaty Law: Treaty Registration under Article 102 of the Charter of the United Nations
644: 618: 506: 1676: 1621: 1596: 1576: 1511: 1481: 1446: 1431: 1376: 1371: 1291: 1246: 1226: 456: 190: 523:(2018), in which the court interpreted the extent of the term "any resources" in Article 220(6) of 193:. In treaty law, the VCLT is the authority for resolving disputes about the interpretation of a treaty. 1686: 1556: 1541: 1501: 1416: 1406: 1381: 1341: 1326: 1306: 1256: 278: 1706: 1586: 1566: 1496: 1441: 1286: 516: 1801: 1796: 1761: 344: 1042:
Case C-15/17 Bosphorus Queen Shipping Ltd Corp vs Rajavartiolaitos, ECLI:EU: C:2018:557, para 67.
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has also applied the interpretational provisions of the VCLT in different cases, including the
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concerning specific provisions of the treaty that one wishes to accede to (Article 19).
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Practical Aspects of Treaty Law: The Depositary Functions of the Secretary-General
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Historic Archives of the United Nations Audiovisual Library of International Law
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Lecture Series of the United Nations Audiovisual Library of International Law
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or some other competent authority defined in the treaty in question, such as
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When a treaty is open to "States", it may be difficult or impossible for the
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Enforcing International Maritime Legislation on Air Pollution through UNCLOS
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Aust, Anthony (2006). "Vienna Convention on the Law of Treaties (1969)".
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Repertory of Practice of United Nations Organs Supplement No. 8; page 10
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willing to accept its provisions" is used (the "all states formula").
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have recognised the customary-law status of the Vienna Convention.
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The present Convention shall be open for signature by all States
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Vienna Convention on Succession of States in respect of Treaties
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of the ILC, which included prominent international law scholars
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The VCLT is often relied upon in investment arbitration cases.
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Vienna Convention on the Law of Treaties, Article 81, Signature
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List of parties to the Vienna Convention on the Law of Treaties
239: 170: 82: 894: 269:, the organisation or person who holds a multilateral treaty. 732: 399: 323:, which subsequently acceded to the convention. There are 66 371:
and so a wording like "this treaty is open for signature to
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parties to the Statute of the International Court of Justice
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to them. Some treaties are restricted to states that are
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Treaties of the Byelorussian Soviet Socialist Republic
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capt. Enchev, V. (2012), Fundamentals of Maritime Law
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that have neither signed nor ratified the convention.
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Treaties drafted by the International Law Commission
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Max Planck Encyclopedias of Public International Law
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Treaties of the Ukrainian Soviet Socialist Republic
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Max Planck Encyclopedia of Public International Law
378:In the case of regional organizations, such as the 253:, that agreements must be kept; Article 53 defines 1667:Treaties of the Republic of the Sudan (1985–2011) 703: 701: 699: 697: 641:"Vienna Convention on the Law of Treaties (1969)" 540:United Nations General Assembly Resolution 97 (1) 1143: 1135:(both lectures also available in French) in the 307:(Taiwan), which is currently recognized by only 814:Vienna Convention on the Law of Treaties (1969) 694: 1782:Treaties extended to the Netherlands Antilles 1232:Treaties of the People's Republic of Bulgaria 500: 311:, signed the Convention in 1970 prior to the 134:Arabic, Chinese, English, French, and Russian 1662:Treaties of Saint Vincent and the Grenadines 590: 588: 586: 584: 292: 1517:Treaties of the Mongolian People's Republic 1397:Treaties of the Hungarian People's Republic 863: 861: 859: 410:to "participate in the elaboration" of the 1262:Treaties of the People's Republic of China 615:"Vienna Convention on the Law of Treaties" 581: 546:Vienna Convention on Diplomatic Relations 35:Vienna Convention on the Law of Treaties 1252:Treaties of the Central African Republic 1112:Vienna Convention on the Law of Treaties 889: 887: 885: 856: 783: 595:Vienna Convention on the Law of Treaties 441:permanent member of the Security Council 347:contain rules about what entities could 163:Vienna Convention on the Law of Treaties 150:Vienna Convention on the Law of Treaties 638: 552:Vienna Convention on Consular Relations 1772:Treaties extended to the Faroe Islands 1462:Treaties of the Libyan Arab Jamahiriya 1144: 789:Principles of Public International Law 229: 1272:Treaties of the Republic of the Congo 913: 882: 609: 607: 605: 603: 429: 336:Signature, ratification and accession 826:10.1093/law:epil/9780199231690/e1498 811: 655:10.1093/law:epil/9780199231690/e1498 37: 1157:Treaties entered into force in 1980 733:United States Department of State. 13: 1572:Treaties of the State of Palestine 1317:Treaties of the Dominican Republic 1222:Treaties of Bosnia and Herzegovina 879:Articles 2 and 5 of the Convention 600: 480:International Atomic Energy Agency 263:Fundamental Change of Circumstance 14: 1813: 1637:Treaties of Serbia and Montenegro 1362:Treaties of the Kingdom of Greece 1092: 330: 1792:Treaties extended to West Berlin 933:United Nations Secretary-General 569:Provisional application (treaty) 144: 29: 1652:Treaties of the Solomon Islands 1062: 1045: 1036: 1026: 1023:the so-called "Vienna formula". 1014: 989: 977: 955: 942: 901:. United Nations. 26 April 2018 873: 842: 464:United Nations General Assembly 384:Organization of American States 1777:Treaties extended to Greenland 1727:Treaties of the United Kingdom 1297:Treaties of the Czech Republic 805: 678: 632: 488:International Court of Justice 173:that regulates treaties among 48: 1: 1347:Treaties of Georgia (country) 472:Members of the United Nations 414:and specifically allowed the 317:vote to transfer China's seat 1617:Treaties of the Soviet Union 619:United Nations Treaty Series 574: 507:International Law Commission 42: 7: 1697:Treaties of North Macedonia 1657:Treaties of Francoist Spain 1592:Treaties of the Philippines 1547:Treaties of the Netherlands 533: 279:international organizations 191:customary international law 54: 10: 1818: 1787:Treaties extended to Aruba 1302:Treaties of Czechoslovakia 1152:Treaties concluded in 1969 938:UN Office of Legal Affairs 564:List of Vienna conventions 501:Interpretation of treaties 321:People's Republic of China 296: 196: 1467:Treaties of Liechtenstein 517:European Court of Justice 293:Parties to the convention 143: 138: 130: 120: 112: 104: 100:Ratification by 35 states 96: 88: 78: 70: 28: 1717:Treaties of Turkmenistan 1627:Treaties of Saudi Arabia 1492:Treaties of the Maldives 1387:Treaties of the Holy See 1357:Treaties of East Germany 1352:Treaties of West Germany 1237:Treaties of Burkina Faso 950:Belém do Pará Convention 929:UN THE WORLD TODAY (PDF) 899:Dag Hammerskjöld Library 476:the specialized agencies 445:the specialized agencies 412:2011 Istanbul Convention 309:11 UN member states 272: 116:116 (as of January 2018) 1682:Treaties of Switzerland 1607:Treaties of South Korea 1552:Treaties of New Zealand 1167:United Nations treaties 1074:Kluwer Arbitration Blog 986:Articles 76, 77 and 81. 716:17 October 2013 at the 449:international community 171:international agreement 16:International agreement 1757:Treaties of Yugoslavia 1747:Treaties of Uzbekistan 1702:Treaties of East Timor 1692:Treaties of Tajikistan 1532:Treaties of Mozambique 1522:Treaties of Montenegro 1477:Treaties of Luxembourg 1437:Treaties of Kyrgyzstan 1422:Treaties of Kazakhstan 1277:Treaties of Costa Rica 952:Article 15, 16 and 17. 760:juridicum.univie.ac.at 639:Anthony, Aust (2006). 498: 484:parties to the Statute 341:International treaties 24:on the Law of Treaties 1507:Treaties of Mauritius 1472:Treaties of Lithuania 1367:Treaties of Guatemala 1197:Treaties of Australia 1187:Treaties of Argentina 468: 261:; Article 62 defines 1732:Treaties of Tanzania 1672:Treaties of Suriname 1647:Treaties of Slovenia 1642:Treaties of Slovakia 1602:Treaties of Portugal 1582:Treaties of Paraguay 1487:Treaties of Malaysia 1427:Treaties of Kiribati 1392:Treaties of Honduras 1267:Treaties of Colombia 1242:Treaties of Cameroon 1207:Treaties of Barbados 997:UN Secretary-General 521:Bosphorus Queen Case 436:depositary authority 125:UN Secretary-General 1767:Treaty law treaties 1752:Treaties of Vietnam 1742:Treaties of Uruguay 1737:Treaties of Ukraine 1712:Treaties of Tunisia 1632:Treaties of Senegal 1612:Treaties of Moldova 1562:Treaties of Nigeria 1537:Treaties of Myanmar 1527:Treaties of Morocco 1457:Treaties of Liberia 1452:Treaties of Lesotho 1412:Treaties of Jamaica 1402:Treaties of Ireland 1337:Treaties of Finland 1332:Treaties of Estonia 1322:Treaties of Ecuador 1312:Treaties of Denmark 1282:Treaties of Croatia 1217:Treaties of Belgium 1202:Treaties of Austria 1192:Treaties of Armenia 1182:Treaties of Andorra 1177:Treaties of Algeria 1172:Treaties of Albania 984:Istanbul Convention 965:. Council of Europe 313:UN General Assembly 250:pacta sunt servanda 238:The VCLT defines a 230:Content and effects 204:special rapporteurs 25: 1677:Treaties of Sweden 1622:Treaties of Rwanda 1597:Treaties of Poland 1577:Treaties of Panama 1512:Treaties of Mexico 1482:Treaties of Malawi 1447:Treaties of Latvia 1432:Treaties of Kuwait 1377:Treaties of Guyana 1372:Treaties of Guinea 1292:Treaties of Cyprus 1247:Treaties of Canada 1227:Treaties of Brazil 1125:Annebeth Rosenboom 1059:. Hart Publishing. 1051:Interpreting the " 1005:Geneva Conventions 870:of the Convention. 459:used its wording. 430:Statehood question 216:Gerald Fitzmaurice 212:Hersch Lauterpacht 21: 1687:Treaties of Syria 1557:Treaties of Niger 1542:Treaties of Nauru 1502:Treaties of Malta 1417:Treaties of Japan 1407:Treaties of Italy 1382:Treaties of Haiti 1342:Treaties of Gabon 1327:Treaties of Egypt 1307:Treaties of Zaire 1257:Treaties of Chile 1104:Introductory note 1076:. 2 December 2019 798:978-0-19-876299-7 707:untreaty.un.org, 690:978-954-8991-69-8 380:Council of Europe 361:members of the UN 305:Republic of China 183:international law 159: 158: 64: 63: 59:Non-parties 22:Vienna Convention 1809: 1707:Treaties of Togo 1587:Treaties of Peru 1567:Treaties of Oman 1497:Treaties of Mali 1442:Treaties of Laos 1287:Treaties of Cuba 1086: 1085: 1083: 1081: 1066: 1060: 1049: 1043: 1040: 1034: 1030: 1024: 1021:UN Legal Affairs 1018: 1012: 993: 987: 981: 975: 974: 972: 970: 959: 953: 946: 940: 917: 911: 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Index


Vienna
UN Secretary-General
Vienna Convention on the Law of Treaties
Wikisource
international agreement
sovereign states
international law
customary international law
special rapporteurs
James Brierly
Hersch Lauterpacht
Gerald Fitzmaurice
Humphrey Waldock
treaty
ratification
pacta sunt servanda
peremptory norm
Fundamental Change of Circumstance
depositary
international organizations
Vienna Convention on the Law of Treaties between States and International Organizations or Between International Organizations
List of parties to the Vienna Convention on the Law of Treaties
Republic of China
11 UN member states
UN General Assembly
vote to transfer China's seat
People's Republic of China
UN member states
International treaties

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