Vienna Convention on the Law of Treaties Between States and International Organizations or Between International Organizations

The Vienna Convention on the Law of Treaties Between States and International Organizations or Between International Organizations (VCLTIO) is an extension of the Vienna Convention on the Law of Treaties which deals with treaties between states. It was developed by the International Law Commission and opened for signature on 21 March 1986.

Vienna Convention on the Law of Treaties Between States and International Organizations or Between International Organizations

States which are signatory or party to the Vienna Convention on the Law of Treaties between States and International Organizations or between International Organizations   Signatories   Parties
Signed	21 March 1986
Location	Vienna
Effective	not in force
Condition	Ratification or accession by 35 states
Signatories	39
Parties	45, among which 33 states
Depositary	UN Secretary-General
Languages	Arabic, Chinese, English, French, Russian and Spanish

Article 85 of the Convention provides that it enters into force after ratification or accession by 35 states. As of October 2022,^[update] the treaty has been ratified or acceded to by 33 states. As a result, the convention is not yet in force.^[1]

Parties to the convention

33 state parties have ratified or acceded to the convention: Mexico, Colombia, Argentina, Uruguay, Senegal, Liberia, Gabon, Australia, United Kingdom, Denmark, Sweden, Estonia, Belarus, Moldova, Bulgaria, Cyprus, Greece, Spain, Germany, Netherlands,^{[nb 1]} Belgium, Switzerland, Liechtenstein, Italy, Austria, Croatia, Hungary, Czech Republic, Slovakia, Malta, Albania, Portugal and Palestine.

Additionally, there are 12 international organizations that issued formal confirmations of the convention: IAEA, ICAO, Interpol, ILO, IMO, OPCW, CTBTO Preparatory Commission, the UN, UNIDO, UPU, WHO and WIPO.

The signatory states that have not ratified are: Ivory Coast, DR Congo, United States, Brazil, Bosnia and Herzegovina, South Korea, Japan, Serbia, Montenegro, Morocco, Egypt, Sudan, Burkina Faso, Benin, Zambia, and Malawi. Additionally, there are international organizations that have signed, but not completed their formal confirmation procedures: CoE, FAO, ITU, UNESCO and WMO.

See also

• Vienna Convention on Diplomatic Relations (1961)
• Vienna Convention on Consular Relations (1963)
• Vienna Convention on the Law of Treaties (1969)
• List of Vienna conventions
• Jus tractatuum

Notes

1. The convention is ratified on behalf of the whole kingdom, rather than just the constituent country of the Netherlands.