What UNASUR is and how it works
On 23 May 2008 twelve states signed the Constitutive Treaty at Brasília, in original copies of equal authority in four languages. Article 23 makes English, Spanish, Portuguese and Dutch the official languages of the union, and Guyana accounts for the first of them while Suriname accounts for the last. The treaty entered into force on 11 March 2011, thirty days after the ninth ratification reached the depositary.
Counted from the members
- Members
- 7
- Founded
- 2008
- People
- 358.0 m
- Economy
- $3.6 tnGDP
- Per person
- $10 102a head
- Land area
- 14 826 786km²
Four texts, and none of them a translation
The treaty was done at Brasília on 23 May 2008 in original copies in the English, Spanish, Portuguese and Dutch languages, the four texts being equally authentic, and Article 23 carries the same four over as the official languages of the union. The provision is a description of who signed. Portuguese is the official language of Brazil alone among the members here, English of Guyana alone, Dutch of Suriname alone, and Spanish of the rest, with Aymara, Guarani and Quechua recorded beside it on Bolivia's own file.
The preamble says where that comes from. It undertakes to carry forward what MERCOSUR and the Andean Community had achieved, "as well as the experiences of Chile, Guyana and Suriname", naming the signatories that belonged to neither. A grouping assembled by continent rather than by language takes in the two Guianas that were never Spanish or Portuguese, and the treaty's own drafting is where that shows up first. The additional protocol of 2010 was signed at Georgetown in the same four languages, all of them equally authentic.
Every norm by consensus
Article 12 opens with the sentence the institution hangs on: all the norms of UNASUR will be adopted by consensus. Decisions may be taken with three quarters of the member states present, and a state that was absent has thirty days to make its position known, or fifteen days in the Council of Delegates. Working groups sit with half the membership plus one. The treaty therefore anticipates an empty chair without letting one carry a decision.
The rest of the apparatus rotates. Article 7 passes the pro tempore presidency to each member in alphabetical order for a year at a time. Article 10 gives the Secretary General a two-year term, renewable once, and forbids a successor of the same nationality.
Where the treaty put its own machinery
Article 10 seats the General Secretariat at Quito and Article 22 requires a headquarters agreement with Ecuador. Article 26 makes the Government of Ecuador the depositary of every instrument of ratification, and the same office of Article 8 of the democratic protocol. Article 17 places a South American Parliament at Cochabamba and leaves its composition to an additional protocol that a transitory article told a special commission, meeting in Cochabamba, to draft. The Library of the National Congress of Chile, reviewing the file in April 2019, recorded that the building meant for that parliament had been completed in September 2018 and that the draft protocol had not been put to the member states. The treaty itself was registered with the United Nations Secretariat under number 60,773, as Article 27 requires.
The suspension, the notes, and the six months
On 20 April 2018 six member states announced that they were suspending their participation for an indefinite period. Colombia gave written notice of denunciation on 27 August 2018, stating that the organisation had kept silent about the treatment of citizens in Venezuela. Ecuador announced its withdrawal on 13 March 2019 and asked for the return of the building outside Quito that housed the General Secretariat. On 22 March 2019 eight governments signed a document at Santiago declaring an intention to constitute the Forum for the Progress of South America in place of UNASUR. Paraguay's note followed on 11 April 2019, Argentina's on 12 April 2019, Brazil's on 15 April 2019 and Chile's on 18 April 2019.
The Argentine note went to Ecuador as depositary and to the pro tempore presidency, and the accompanying statement gave as its reasons a General Secretariat that had been without a head for more than two years, an agenda far from the founding objectives, and administrative disorder. Brazil's note cited the document signed at Santiago three weeks earlier.
Article 24 lets any member denounce the treaty by written notice to the depositary, with effect six months after the notice is received. Argentina's denunciation, lodged on 12 April 2019, took effect on 12 October 2019. The same article keeps the outstanding ordinary contributions payable.
Three returns, and three different recipients
Argentina signed a fresh instrument of ratification on 12 May 2023 and handed it over on 16 May 2023 to Venezuela, in what the Argentine treaty register describes as its capacity as the member state guaranteeing the safekeeping of the union's assets. The treaty entered into force for Argentina again on 15 June 2023. Brazil's promulgating decree of 6 April 2023 records its instrument as deposited with the member states of the union, and the treaty in force for Brazil from 6 May 2023. The Colombian foreign ministry recorded that country's return on 5 December 2023, at the first meeting of the Council of Delegates it attended as a member state. Article 26 still names the Government of Ecuador as depositary, and none of the three re-entries is recorded as having been deposited there.
The way in, and what stands in place of expulsion
Article 19 lets other Latin American and Caribbean states be admitted as Associate States by the Council of Heads of State and Government. Article 20 opens the only route from there to full membership: after the fifth year from entry into force, and after four years of associate status, the Council may consider an accession request on a consensual recommendation of the foreign ministers, and the accession protocol enters into force thirty days after every member and the acceding state has ratified it.
Nothing in the treaty expels anybody. What stands in its place is the Additional Protocol on Commitment to Democracy, signed at Georgetown on 26 November 2010 and made an integral part of the treaty by its Article 8. Its Article 4 lets the heads of state, or the foreign ministers in their absence, suspend a state's right to take part in the bodies of UNASUR, close land borders partially or completely, suspend trade, air and maritime traffic, communications and the provision of energy, and press for the same suspension in other organisations. Article 7 ends those measures on the date the affected state is notified that the constitutional democratic order has been confirmed as restored.
Counted from the records
What UNASUR runs on
- Landlocked members
- 1 of 7without a coast
- In the United Nations
- 7 of 7every member holds a seat
- Time zones
- -05:00, -04:00, -03:00, -02:004 offsets
- Currencies
- ARS, VED, BOB, BRL, COP, GYD, SRD, VES
- Official languages
- Spanish, Aymara, Dutch, English, Guarani, Portuguese, Quechua, Venezuelan Sign LanguageSpanish in 4 of them
- How they are filed
- 7 sovereign statesthe roster's own three statuses
- Driving side
- 3 keep left · 4 keep right
- Calling codes
- +54, +55, +57, +58, +591, +592, +597
Common questions
Questions about UNASUR
Why are English and Dutch official languages of UNASUR?
Article 23 names English, Spanish, Portuguese and Dutch, and the treaty was done at Brasília on 23 May 2008 in all four as equally authentic originals. The membership was drawn by continent, so it takes in Guyana, whose official language is English, and Suriname, whose official language is Dutch. The preamble names both, beside Chile, as signatories that belonged to neither MERCOSUR nor the Andean Community.
How does a country leave UNASUR?
Article 24 gives the treaty indefinite duration and lets any member denounce it by written notice to the depositary, which then informs the others. The denunciation takes effect six months after the notice is received, and it does not cancel unpaid ordinary contributions. Colombia gave notice on 27 August 2018. Argentina's note of 12 April 2019 took effect on 12 October 2019.
What happened to UNASUR in 2018 and 2019?
On 20 April 2018 Argentina, Brazil, Chile, Colombia, Paraguay and Peru announced that they were suspending their participation for an indefinite period. Formal denunciations followed, Colombia's in August 2018 and Paraguay's, Argentina's, Brazil's and Chile's in April 2019, and Ecuador announced its withdrawal on 13 March 2019. On 22 March 2019 eight governments signed a document at Santiago proposing the Forum for the Progress of South America in its place.
Where is UNASUR based?
Article 10 puts the General Secretariat at Quito, and Article 22 requires a headquarters agreement with Ecuador. Ecuador announced its withdrawal on 13 March 2019 and asked for the return of the building on the edge of the city that housed the secretariat. Article 17 places a South American Parliament at Cochabamba, subject to an additional protocol that the Library of the National Congress of Chile recorded in April 2019 as not yet put to the member states, in a building finished in September 2018.
Did Brazil and Argentina return to the treaty?
Both lodged fresh instruments of ratification in 2023. Brazil's decree of 6 April 2023 promulgated the treaty and records it in force for Brazil from 6 May 2023. Argentina's instrument was dated 12 May 2023 and handed over on 16 May 2023, and the treaty entered into force for Argentina on 15 June 2023. The Colombian foreign ministry recorded its own return on 5 December 2023.
How the membership was established
The members listed on this site are the ones UNASUR publishes itself, read on 2026-09-02. Every other group here takes its membership from the statements on each country’s own record, which for this one are incomplete.
Sources
- Constitutive Treaty of the Union of South American Nations · The authentic English text. Articles 7, 10, 12, 17, 19, 20, 22, 23, 24, 26 and 27, and the signature clause naming the four originals of 23 May 2008.
- Additional Protocol to the Constitutive Treaty of UNASUR on Commitment to Democracy · The authentic English text, signed at Georgetown on 26 November 2010. The measures in Article 4 and the integral-part clause in Article 8.
- Ficha del instrumento: Tratado Constitutivo de la Unión de Naciones Suramericanas · Biblioteca Digital de Tratados, Argentine Ministry of Foreign Affairs. Entry into force on 11 March 2011, the denunciation of 12 April 2019 effective 12 October 2019, the instrument of 12 May 2023 handed over on 16 May 2023, and the United Nations registration number.
- Tratado Constitutivo de UNASUR: proceso de retiro y denuncia de la organización · Asesoría Técnica Parlamentaria, Library of the National Congress of Chile, April 2019. The suspension of 20 April 2018, the notes of Colombia, Ecuador, Paraguay, Argentina, Brazil and Chile, and the Cochabamba building.
- La Argentina se retira de la UNASUR · Argentine Ministry of Foreign Affairs, press information 145/19 of 12 April 2019. The note addressed to Ecuador as depositary and to the pro tempore presidency, and the reasons stated for it.
- Decreto nº 11.475, de 6 de abril de 2023 · Presidency of Brazil. The promulgation of the treaty, the instrument deposited with the member states on 6 April 2023, and entry into force for Brazil on 6 May 2023.
- Después de casi cinco años, Colombia retorna a la Unión de Naciones Suramericanas · Colombian Ministry of Foreign Affairs, 5 December 2023. The return, and the meeting of the Council of Delegates attended as a member state.