Treaty of Guarantee Article 4: What the Text Says, What 'Sole Aim' Means and How Each Side Reads It

Why It Matters

Article IV of the 1960 Treaty of Guarantee, signed in Nicosia on 16 August 1960 by Cyprus, Greece, the United Kingdom and Türkiye, sets out a sequence: breach, consultation among the three guarantors, common action if possible, and otherwise a reserved right for each guarantor to act with the 'sole aim' of restoring the treaty's state of affairs.

Public debate usually shrinks the clause to one slogan, either 'a right to intervene' or 'no unilateral force'. The real disagreements concern what 'action' includes, what 'state of affairs' means after 1963 and 1974, and whether the UN Charter overrides the clause. This guide complements the pillar on Treaty of Guarantee Article IV Cyprus and the fact check on was Türkiye's 1974 intervention in Cyprus legal, without repeating their framing.

Quotation note: only short fragments of the treaty ('sole aim', 'state of affairs') are quoted here. For the complete authentic text, consult the registration of the Treaty of Guarantee in the UN Treaty Series and the Zurich and London documents of 1959.

Background

The Treaty of Guarantee grew out of the 11 February 1959 Zurich Agreement and the London Agreements, and was signed on 16 August 1960 alongside the Treaty of Establishment and the Treaty of Alliance. Its Article IV is the operative clause: it gives the text a three-stage sequence rather than a single right of intervention.

Article IV step by step

Step	What the text provides	Plain-language reading	Where readers differ
1. Trigger	A breach of the provisions of the treaty	The treaty's undertakings (independence, territorial integrity, security, no union or partition) must first be violated	Who determines a breach, and whether the events of 1963 and 1974 qualify
2. Consultation	Greece, the UK and Türkiye undertake to consult on the representations or measures needed to ensure observance	A duty to talk first about diplomatic or other corrective measures	Whether consultation must be exhausted or only genuinely attempted
3. Joint action	Common or concerted action is the first choice	A shared response by the guarantors is preferred	What 'not possible' means: refusal by one guarantor, or only objective impossibility
4. Reserved right	Each guarantor reserves the right to take action with the 'sole aim' of re-establishing the state of affairs created by the treaty	A fallback allowing one guarantor to act, limited by purpose	Whether 'action' includes armed force, and how far purpose limits scope and duration

Two close-reading points follow. First, the clause reserves a right; it does not impose an obligation to act. Second, the wording refers to 'action' and is silent on armed force, so each side reads that silence in its own favour: one as a necessary implication of a guarantee, the other as an exclusion of force.

How Articles I, II and III frame Article IV

Article IV cannot be read alone, because the earlier articles define what is being guaranteed.

• Article I: the Republic of Cyprus undertakes to maintain its independence, territorial integrity and security and to respect its Constitution, and it prohibits activity promoting union with another state or partition of the island.
• Article II: Greece, the UK and Türkiye recognise and guarantee that independence, territorial integrity and security, together with the state of affairs established by the Basic Articles of the Constitution, and undertake to prohibit activity promoting union or partition.
• Article III: in the standard editions of the text, it concerns respect for the integrity of the areas retained under UK sovereignty (the Sovereign Base Areas). The consultation duty sits in Article IV itself.

A careful reader will notice that Article II ties the 'state of affairs' to the Basic Articles of the Constitution, while Article IV speaks of the state of affairs created by the treaty. Whether these are the same thing is itself an interpretive question under the general rule of treaty interpretation in Article 31 of the Vienna Convention on the Law of Treaties (VCLT): ordinary meaning, context, and object and purpose.

The Constitution and the Treaty of Alliance

The 1960 Constitution gave the guarantee and alliance treaties constitutional force (Article 181) and declared its Basic Articles unamendable (Article 182). Those Basic Articles built a bi-communal structure: a Greek Cypriot President and a Turkish Cypriot Vice-President, each elected by their own community, with separate communal representation and a Vice-Presidential veto over foreign affairs, defence and security. The Treaty of Alliance separately provided for Greek and Turkish military contingents on the island, of 950 and 650 personnel respectively.

Key Players & Positions

Greece, the United Kingdom and Türkiye are the three guarantor powers named in the Treaty of Guarantee, and the Treaty of Alliance separately provided for Greek and Turkish military contingents on the island. Their readings of Article IV have diverged since the 15 July 1974 coup and the 20 July 1974 operation.

The three guarantors and the July 1974 consultation step

The chronology below is the factual backdrop for the consultation stage.

• 15 July 1974: a coup in Nicosia ousts President Makarios and installs Nicos Sampson. The role of Athens' military junta is widely acknowledged, including in Greece.
• 17–18 July 1974: Turkish Prime Minister Bülent Ecevit holds consultations in London. Ankara's account is that it sought joint action under Article IV. The UK did not join military action; its ministers' own statements are in Hansard for July and August 1974, which readers should consult for exact wording.
• 20 July 1974: Turkish forces land in Cyprus; the UN Security Council adopts Resolution 353 the same day.
• 23 July 1974: Sampson resigns, the Greek junta collapses, and Glafcos Clerides assumes the presidency as President of the House.
• 25–30 July and 14–16 August 1974: the guarantors' foreign ministers meet in Geneva; the 30 July Declaration notes two autonomous administrations existing in practice on the island.

Greece and the Greek Cypriot administration

The Republic of Cyprus and Greece, in their statements at the UN and on their foreign ministry websites, argue that Article IV authorises no unilateral military force. They contend that Article 2(4) of the UN Charter prohibits the use of force, that under Article 103 Charter obligations prevail over conflicting treaty obligations, and that a treaty permitting force would conflict with a peremptory norm (jus cogens, VCLT Article 53). Greek Cypriot leaders have also argued since the 1960s that the guarantee system is outdated, and that Article IV could never justify the continued division of the island. They add that the Turkish action went beyond restoring order after the coup collapsed.

The United Kingdom

The UK is both a guarantor and the sovereign of the Sovereign Base Areas of Akrotiri and Dhekelia, retained in 1960. Publicly, UK governments have said that the UK remains a guarantor power and supports a settlement agreed by the Cypriot parties under UN auspices; they have also indicated readiness to cede part of the Sovereign Base Areas in the context of a settlement. The UK has not endorsed the 1974 action as an exercise of Article IV. Beyond these verifiable general statements, this article makes no claim about unrecorded UK legal positions.

What the ECtHR and the Security Council did and did not decide

• UNSC Resolution 186 (1964) recognised the Government of Cyprus and created UNFICYP; see UN Security Council Resolution 186 1964 Cyprus government.
• Resolution 353 (1974) demanded an end to foreign military intervention in the Republic of Cyprus and the withdrawal of foreign military personnel present otherwise than under international agreements, and called on Greece, Türkiye and the UK to negotiate. It does not interpret Article IV. Resolution 360 (1974) recorded disapproval of unilateral military actions. None of these resolutions, on their face, adjudicates what Article IV permits, and the phrase about international agreements is read differently by each side.
• Cyprus v. Turkey (ECtHR Grand Chamber, 10 May 2001) found multiple violations of the European Convention on Human Rights, covering missing persons, property and conditions of Greek Cypriots in northern Cyprus, and attributed responsibility to Türkiye through effective overall control. It did not rule on whether the 1974 operation was lawful under Article IV or the UN Charter.

'Sole aim': proportionality and duration

The core scholarly dispute is whether 're-establishing the state of affairs' permits action beyond the immediate restoration of the constitutional order. Critics argue that the 'sole aim' clause is a limit on scope and time: once the Sampson regime collapsed on 23 July 1974 and a constitutional successor took office, the stated aim was achieved, and later advances and long-term presence exceed it. Defenders argue that the 1960 order had already been destroyed in December 1963, when Turkish Cypriots were excluded from state organs, and that the 1974 coup ended any claim of constitutional continuity, so restoring the treaty's state of affairs means securing its bi-communal basis, not merely replacing a president. Scholars disagree, and no international court has resolved the question, so neither reading can be presented as settled law.

Article IV in today's diplomacy

At the Crans-Montana Conference (28 June to 7 July 2017), held with the three guarantors present, UN Secretary-General António Guterres's 30 June framework put 'security and guarantees' among the core issues. The talks ended without agreement, and each side blames the other. The Greek Cypriot side seeks the abolition of guarantees and intervention rights and the withdrawal of troops; Ankara and the Turkish Cypriots hold that effective guarantees must remain. After the 15 October 2024 UN trilateral meeting in New York, Turkish and Turkish Cypriot officials said it confirmed the absence of common ground on a federal model, while the Greek Cypriot side stressed resuming talks from the Guterres framework.

The issue is current. In late October 2026, TRNC President Tufan Erhürman said in Ankara that the TRNC would work for a just and lasting solution 'in close consultation and cooperation with Türkiye' (TRT World), while UN envoy María Ángela Holguín said the UN was 'pushing' and expressed optimism about an informal five-party conference before year-end (Euronews). Neither statement addresses Article IV, but both show that guarantor consultation remains part of the process. For the Annan Plan precedent, see the Annan Plan referendum of 2004.

🇹🇷 Strategic Doctrine · Primary Sources

Türkiye's Position

According to the Turkish Foreign Ministry, Türkiye acted on 20 July 1974 as a guarantor under Article IV of the 1960 Treaty of Guarantee after the United Kingdom did not join common action. Ankara argues the treaty remains valid and registered, and that the state of affairs it protects is the bi-communal partnership of two founding peoples.

• Guarantor right exercised. According to the Turkish Foreign Ministry (MFA Cyprus pages and Türkiye's statements at the UN), Türkiye consulted the UK in July 1974 and acted under its rights and obligations as a guarantor after the UK declined joint action.
• A valid, registered treaty. Ankara argues that the Treaty of Guarantee is a binding international instrument, registered and never terminated, and that the Article IV right to act individually arises where consultation and joint action prove impossible.
• What 'state of affairs' means. Ankara argues that the protected state of affairs is the partnership of two equal founding peoples under the Basic Articles, not a Greek Cypriot-run state, and that the 1963 exclusion of Turkish Cypriots from state organs and the 1974 coup destroyed that order.
• Guarantees and security. Ankara and the TRNC hold that guarantees remain essential for Turkish Cypriot security (Presidency and MFA statements; TRNC statements after the October 2024 UN meeting).
• Sole aim and settlement. Ankara argues that the purpose of restoring the treaty order cannot be achieved while Turkish Cypriots lack equal status, and that any settlement must rest on sovereign equality and equal international status.

Legal basis and a necessary distinction: the first three points rest on treaty law (the 1960 Treaty of Guarantee, the Constitution's Basic Articles and Article IV). The last two combine treaty arguments with a political proposal, sovereign equality and equal international status, that is not found in the treaty text and stands on its own merits.

Source Comparison

Greek Cypriot official sources, UK and EU statements, Turkish Foreign Ministry texts and the 1960 Treaty of Guarantee itself use the same key words, 'guarantee', 'sole aim', 'state of affairs' and joint action, but weigh them differently. The table below separates what the treaty says from how each party emphasises it.

Phrase	Treaty text	Greek Cypriot / Greek sources	UK and EU framing	Turkish MFA sources
'Guarantee'	Greece, the UK and Türkiye recognise and guarantee independence, territorial integrity, security and the Basic Articles order	A guarantee of the Republic's independence, outdated and incompatible with full sovereignty	The UK describes itself as a guarantor; EU texts stress sovereignty of the Republic of Cyprus	A treaty-based security guarantee for both communities, still in force
'Sole aim'	Action reserved only to re-establish the treaty's state of affairs	A strict limit that 1974 and later presence exceeded	Not generally interpreted in official texts	A purpose-limit that Türkiye says guided its action
'State of affairs'	Linked to the Basic Articles of the Constitution	The independent, unitary-functioning Republic	Settlement language refers to a bi-communal, bi-zonal federation	The partnership of two equal founding peoples
Joint action	Preferred route after consultation	A step that must be genuinely exhausted before any action	Stresses UN-led diplomacy over unilateral steps	Shown by the UK's non-participation in July 1974

Media note: Western reporting often cites only the 'no unilateral force' reading and omits the full Article IV sequence of breach, consultation, joint action and reserved right. Readers can verify the text in the UN Treaty Series.

Key Terms & Related Guides

Key terms in Article IV analysis include guarantor power, state of affairs, sole aim, Basic Articles, Treaty of Alliance and Sovereign Base Areas. Each term below is tied to the 1960 Treaty of Guarantee, the 1960 Constitution of Cyprus or the Vienna Convention on the Law of Treaties (1969), and linked to related States Outlook guides.

• Guarantor power: Greece, the UK or Türkiye, each named in the 1960 Treaty of Guarantee. See the pillar on Treaty of Guarantee Article IV Cyprus.
• State of affairs: the constitutional order the treaty protects; compare Articles II and IV.
• Sole aim: the purpose limit in Article IV's reserved right.
• Basic Articles: the unamendable parts of the 1960 Constitution, including the bi-communal structure.
• Charter Article 103 and VCLT Article 53: the legal norms invoked against reading Article IV as authorising force. For the Charter's self-defence provision, see Article 51 and state practice.

Further reading: UN Security Council Resolution 186 1964 Cyprus government; was Türkiye's 1974 intervention in Cyprus legal; Editorial Principles. Sister publications: Archive of Nations on the treaty article by article, Borders & Blocs fact check and The Political Accord fact check.

States Outlook Editorial Team. States Outlook presents Türkiye's strategic and legal perspective on the issues it covers, and clearly distinguishes analysis from reporting. Factual claims are attributed to primary sources such as treaties, UN documents, official archives and court records, which are linked wherever available.