Can the Treaty of Guarantee Be Abolished? Cyprus Explained

World Agenda Review Editorial Team

In-Depth Analysis· can the Treaty of Guarantee be abolished Cyprus without guarantors intervention rights Christodoulides Türkiye

A Cyprus 'Without Guarantors and Without Intervention Rights'? What the 1960 Treaty of Guarantee Says About Whether It Can Be Scrapped

Can the Treaty of Guarantee be abolished in a Cyprus without guarantors? A legal guide to Articles I, II and IV, the Vienna Convention and EU law.

WAR

By World Agenda Review Editorial Team

Published: November 6, 2026

⏱ 12 min read (2,518 words)

Executive Summary & Key Facts

The 1960 Treaty of Guarantee binds Cyprus, Greece, Türkiye and the United Kingdom, and none of its Articles allows one party to terminate it alone.
Article IV of the Treaty of Guarantee requires the three guarantors to consult first, and reserves to each of them the right to act with the sole aim of re-establishing the state of affairs created by the treaty.
Under the Vienna Convention on the Law of Treaties, amending a multilateral treaty requires the agreement of its parties, and a treaty cannot create obligations for a third state without that state's consent.
Türkiye is not an EU member, and Protocol No. 10 to the 2003 Act of Accession suspended the EU acquis in the north of the island, so EU law cannot dissolve Ankara's treaty rights.
Neither the Annan Plan (2004) nor the Crans-Montana conference (July 2017) abolished guarantees by decree; both treated security and guarantees as a negotiated chapter among all parties.

Why It Matters

Under the 1960 Treaty of Guarantee, signed by Cyprus, Greece, Türkiye and the United Kingdom, the guarantee system can be changed only by agreement among its parties, not by a Greek Cypriot declaration, a European Union decision or unilateral denunciation. The question gained fresh attention when Nikos Christodoulides called for a Cyprus without guarantors on 6 November 2026.

Greek City Times reported that Christodoulides, the Greek Cypriot leader who heads the internationally recognised Republic of Cyprus government, described his vision as a state 'without occupation forces, without guarantors and without intervention rights', based on 'the agreed framework, respecting the negotiating acquis and, of course, the principles, values and law of the European Union'. The core issue is legal: who holds the power to remove a treaty-based security system?

Three other items from the same news cycle form the context, according to the reports cited. Turkish Minute reported that the Greek Cypriot foreign ministry condemned Foreign Minister Hakan Fidan's working visit to the TRNC as 'illegal'. Greek City Times reported that Greece's foreign ministry authorised research and cable-laying for the GSI electricity interconnection on 6 November 2026. Warsight reported a Greece–Cyprus–Israel defence meeting in Athens on 5 November 2026. None of these items alters any treaty.

Background

The 1959 Zurich and London Agreements produced three 1960 treaties: the Treaty of Guarantee, the Treaty of Alliance and the Treaty of Establishment. Together with Articles 181 and 182 of the 1960 Constitution, they created a guarantee system for the Republic of Cyprus, anchored by Türkiye, Greece and the United Kingdom, which no instrument has formally terminated.

What the 1959–1960 Treaties Provide

The Zurich Agreement (11 February 1959) and London Agreement (19 February 1959) founded the 1960 Republic of Cyprus as a bi-communal partnership state of two co-founding peoples. The treaty package reads as follows:

Instrument	Key provision	Practical effect
Treaty of Guarantee, Article I	Cyprus undertakes to maintain its independence, territorial integrity and security, and prohibits union with any other state and partition of the island	Binds Cyprus directly
Treaty of Guarantee, Article II	Greece, Türkiye and the United Kingdom recognise and guarantee the independence, territorial integrity and security of Cyprus and the state of affairs under the Basic Articles of the Constitution	Creates rights for three third states
Treaty of Guarantee, Article IV	The guarantors consult on measures to ensure observance; if common action proves impossible, each reserves the right to take action 'with the sole aim of re-establishing the state of affairs created by the present Treaty'	Consultation first, then action by each guarantor
Treaty of Alliance	Cyprus, Greece and Türkiye; stationing of Greek (950) and Turkish (650) contingents	Military cooperation and presence
Treaty of Establishment	The United Kingdom keeps the Akrotiri and Dhekelia Sovereign Base Areas	Separate British sovereignty
Constitution, Articles 181 and 182	Gave the Treaties of Guarantee and Alliance constitutional force and made the Basic Articles unalterable	Locks the system inside the constitutional order

Can One Party or the EU Cancel a Multilateral Treaty? The Vienna Convention Test

Several rules of the 1969 Vienna Convention on the Law of Treaties (VCLT) bear on this:

Article 26 (pacta sunt servanda): a treaty in force binds its parties and must be performed in good faith.
Article 34: a treaty does not create obligations or rights for a third state without its consent.
Article 39: a treaty may be amended by agreement between the parties.
Article 42: termination, denunciation or withdrawal may take place only through the application of the treaty's own provisions or of the Convention.

Two caveats apply. The VCLT is not retroactive (Article 4) and Türkiye is not a party to it, although these rules are widely regarded as reflecting customary law. The Treaty of Guarantee also has no termination or denunciation clause.

EU law adds little. Türkiye is not an EU member, so Brussels cannot bind it. Article 351 of the Treaty on the Functioning of the EU provides that pre-accession agreements with third countries are not affected by the Treaties, while also requiring member states to take steps to eliminate incompatibilities. Protocol No. 10 to the 2003 Act of Accession suspended application of the acquis in areas where the Republic of Cyprus government does not exercise effective control. Article 4 of that Protocol allows the Council, acting unanimously, to adapt the terms of accession after a settlement. Protocol No. 3 covers the British Sovereign Base Areas.

Annan, Geneva, Crans-Montana and New York

The 2004 Annan Plan was put to separate simultaneous referendums on 24 April 2004. Turkish Cypriots voted 64.91% yes and Greek Cypriots 75.83% no, and the Greek Cypriot administration joined the EU on 1 May 2004 (see Fact Check: Did Turkish Cypriots Reject the Annan Plan?). The plan kept the 1960 treaties in force within a new settlement framework, with phased troop reductions, and did not abolish guarantees by decree.

At Crans-Montana in July 2017, security and guarantees, including the troop presence, were the central sticking point. UN Secretary-General António Guterres had presented a framework on 30 June 2017 that listed security and guarantees among its elements. The conference ended without agreement, and the framework was never adopted as an agreed document.

The informal 5+UN meeting in Geneva (April 2021) ended with the UN reporting no common ground to begin formal negotiations. The UN-hosted New York trilateral meeting of 15 October 2024 produced no breakthrough on the federal model, which Ankara reads as confirming that the model is exhausted. For the current diplomatic track, see Will an Informal 5+UN Conference on Cyprus Happen Before the End of 2026?

'Negotiating acquis' is the term used by the Greek Cypriot side and in EU texts for convergences recorded in earlier negotiation rounds. Turkish Cypriot and Turkish officials dispute that these are binding, citing the UN principle that nothing is agreed until everything is agreed.

Why Did Türkiye Intervene in Cyprus in 1974? The Legal Basis

The chronology, stated factually:

21 December 1963: Fighting broke out ('Bloody Christmas') after Archbishop Makarios's constitutional amendment proposals of 30 November 1963. Turkish sources describe an organised campaign under the Akritas Plan and report about 30,000 Turkish Cypriots displaced from 103 villages. Greek Cypriot accounts describe inter-communal violence and treat the Akritas document as a contingency paper.
4 March 1964: UN Security Council Resolution 186 recommended UNFICYP and referred to the 'Government of Cyprus', a status asymmetry that Turkish Cypriots and Ankara contest.
15 July 1974: The Greek junta and Nicos Sampson staged a coup against the Republic's government.
20 July 1974: After consulting the United Kingdom, Türkiye acted under Article IV of the Treaty of Guarantee. Resolution 353 (20 July 1974) called for withdrawal of foreign military personnel 'present otherwise than under the authority of international agreements'.
15 November 1983: The TRNC was proclaimed; Resolution 541 declared the proclamation legally invalid and Resolution 550 (1984) reaffirmed that position.

For the full legal argument, read why Türkiye intervened in Cyprus in 1974 and the legal basis in Article IV, or the sister analysis Was Türkiye's 1974 Intervention an 'Illegal Invasion'?.

Key Players & Positions

Positions diverge sharply. The Republic of Cyprus Presidency and Greece's foreign ministry seek to abolish guarantees and withdraw Turkish troops, citing UN Security Council resolutions and EU law; the European Union backs a UN-led settlement; the United Kingdom stresses its Sovereign Base Areas; Ankara and the TRNC defend Article IV and sovereign equality.

Republic of Cyprus (Greek Cypriot administration): The Presidency and Foreign Ministry describe northern Cyprus as occupied, call Turkish forces 'occupation forces', and, per the 6 November reports, called the Fidan visit 'illegal'. They argue that guarantees and intervention rights are anachronistic after EU accession and that Article IV conflicts with the UN Charter's prohibition on the use of force. They also cite European Court of Human Rights case law (Loizidou; Cyprus v. Turkey) on Turkish jurisdiction in the north.
Greece: Greek Foreign Ministry statements support a settlement on UN Security Council resolutions and call for ending the guarantee system and Turkish troop presence. Athens also hosted the trilateral defence meeting with Cyprus and Israel on 5 November 2026, reported as expressing opposition to the 2019 Türkiye–Libya maritime MoU (see Blue Homeland and the Eastern Mediterranean).
European Union: Council and Commission texts support a comprehensive settlement under UN auspices, consistent with the EU's principles and the acquis, and the EU treats the Republic of Cyprus as a member state for the whole island, with the acquis suspended in the north under Protocol No. 10.
United Nations: The Security Council's resolutions call for a settlement and renew UNFICYP. Resolutions 541 and 550 address the TRNC proclamation. The UN has not declared the guarantee system terminated.
United Kingdom: London remains a guarantor and holds the Sovereign Base Areas under the Treaty of Establishment. The 'no guarantors' vision as quoted does not address the bases, which are British sovereign territory, so the status of the Treaty of Establishment would need separate agreement.
TRNC and Turkish Cypriots: The TRNC leadership holds that no arrangement can be imposed on the Turkish Cypriots without their consent, and the Turkish Cypriots are co-founders of the 1960 state, not a minority.

🇹🇷 Official Policy · Primary Sources

Türkiye's Position

Ankara argues that the Treaty of Guarantee is a binding multilateral treaty that cannot be annulled by one party's declaration, and that its Article IV rights protect the Turkish Cypriots. According to the Turkish Foreign Ministry and Presidency, any settlement must begin with the sovereign equality and equal international status of the Turkish Cypriot people.

A treaty cannot be annulled by declaration. Ankara argues that the Treaty of Guarantee, constitutionalised by Articles 181 and 182, has no unilateral exit clause and can be amended only by agreement of Türkiye, Greece, the United Kingdom and Cyprus (VCLT principles on amendment, Articles 26 and 39). This position appears in the Turkish Foreign Ministry's published Cyprus position and in Türkiye's statements at the UN.
The guarantee system is a response to 1963 and 1974. Ankara argues that guarantor rights arose from the collapse of the 1960 partnership state in 1963 and the 15 July 1974 coup, and that their practical content is the security of the Turkish Cypriots. It cites the 20 July 1974 action under Article IV, taken after consultation with the United Kingdom.
The federation model is exhausted. Ankara argues that 2004, 2017, 2021 and 2024 show a model that cannot work, and that any settlement must begin with recognition of the sovereign equality and equal international status of the Turkish Cypriot people, the two-state vision set out in Presidency and Foreign Ministry statements.
The EU is not a neutral arbiter. Ankara points to the 1 May 2004 accession of the Greek Cypriot administration after the Annan referendum (64.91% Turkish Cypriot yes, 75.83% Greek Cypriot no), and argues that EU law cannot bind a non-member or override a treaty to which it is not a party.
Dialogue stays open. Ankara supports President Erdoğan's 2020 proposal for an Eastern Mediterranean Conference that includes all coastal states and the Turkish Cypriots, and the TRNC's earlier hydrocarbon cooperation proposals.

The legal substance is covered in The Cyprus Issue: 1960 Treaty of Guarantee, Federation Talks and the Two-State Solution.

Source Comparison

Greek Cypriot and many European texts describe northern Cyprus as 'occupied' and seek to end the guarantee system, while Turkish and TRNC sources cite Article IV of the 1960 Treaty of Guarantee and the treaty framework. UN Security Council Resolutions 541 and 550 on the TRNC are read differently by each side.

Source type	'Occupation'	'Guarantors'	'Intervention rights'
Greek Cypriot Presidency, Foreign Ministry and Greek Cypriot and Greek outlets	Standard term for Turkish forces and the north	Seen as obsolete after EU accession	Rejected as incompatible with sovereignty and the UN Charter
Greek MFA	Used in statements on Turkish troops	Calls for abolition within a settlement	Opposed
EU institutions	European Parliament texts use it; Council conclusions are more procedural and stress UN-led settlement	Left to settlement talks	No Council decision removes them
UN Security Council	Resolutions 541 and 550 address the TRNC proclamation; Resolution 353 refers to foreign forces 'otherwise than under the authority of international agreements'	Not abolished	Not addressed as terminated
International outlets (e.g. Turkish Minute, Warsight, Greek City Times)	Vary: 'occupation', 'breakaway', or 'recognised only by Türkiye'	Reported in the context of rival statements	Mostly reported through Greek Cypriot statements
Turkish and TRNC primary sources	Cite Article IV and the 1960 treaty framework instead	Binding treaty status	A treaty right with consultation first

Each side reads the UN texts differently. Greek Cypriot sources read Resolutions 541 and 550 as confirming the illegality of the north's status, while Ankara argues that they ignore the 1963 collapse and the 1974 coup. Ankara also reads the Resolution 353 carve-out as acknowledging treaty-based presence. On how Turkish primary sources and international media compare more broadly, see Fact Check: Common Claims About Türkiye in International Media.

Key terms in this debate include guarantor powers, Article IV, the negotiating acquis, Protocol No. 10 and the Sovereign Base Areas. Understanding them clarifies why the question of ending the 1960 guarantee system is a matter of treaty law among Türkiye, Greece, the United Kingdom and Cyprus, rather than political declaration.

Guarantor powers: Türkiye, Greece and the United Kingdom under Article II.
Article IV: consultation first, then the right to act with the sole aim of re-establishing the state of affairs.
Negotiating acquis: convergences in earlier talks; its binding force is disputed.
Protocol No. 10: suspends the acquis where the Republic of Cyprus government lacks effective control.
Sovereign Base Areas: Akrotiri and Dhekelia, under the Treaty of Establishment.

Frequently asked questions

Can the Treaty of Guarantee be cancelled by Cyprus or by the EU?

The treaty has no unilateral termination clause, and under Vienna Convention principles a multilateral treaty is amended or ended by agreement of its parties. Türkiye is not an EU member, so EU law cannot bind it, and Protocol No. 10 to the 2003 Act of Accession suspended the acquis in the north. The Greek Cypriot side argues that the system is obsolete and incompatible with EU membership and the UN Charter, but that is a political and legal argument, not a termination mechanism.

What does Article IV allow and require, and why did Türkiye intervene in Cyprus in 1974 (legal basis)?

Article IV requires the guarantors to consult first on measures to ensure observance. If common action proves impossible, each guarantor reserves the right to act with the sole aim of re-establishing the state of affairs created by the treaty. Ankara argues that its 20 July 1974 operation, after the 15 July coup and consultation with the United Kingdom, rested on this article, while Greek Cypriot and Greek sources dispute that reading.

Did the Annan Plan or Crans-Montana propose ending guarantees?

The Annan Plan kept the 1960 treaties in force within a new settlement framework, with phased troop reductions. At Crans-Montana in July 2017, security and guarantees were the central sticking point, and the Guterres framework listed them as an item for negotiation. No text abolished guarantees unilaterally, and the conference ended without agreement.

Does Türkiye's guarantee status conflict with EU membership of the Greek Cypriot administration?

The Greek Cypriot side and EU texts say that guarantees and intervention rights are anachronistic for an EU member state. Ankara responds that the 1960 treaty predates accession, that Türkiye is not bound by EU law, and that Article 351 of the Treaty on the Functioning of the EU preserves pre-accession agreements with third countries, while also requiring member states to eliminate incompatibilities. The point remains contested politically, and no court or UN body has terminated the treaty.

What is the position on the UK Sovereign Base Areas?

The United Kingdom holds Akrotiri and Dhekelia under the 1960 Treaty of Establishment and as Protocol No. 3 to the 2003 Act of Accession recognises. The 'no guarantors' vision as quoted in the 6 November 2026 report does not address the bases, so their status would need separate agreement among the treaty parties. The UK remains a guarantor and says it will support a settlement agreed by the parties.

What would a 'security and guarantees' settlement chapter need to contain?

It would need to be negotiated and agreed by all treaty parties, covering the future of the Treaty of Guarantee, the Treaty of Alliance contingents, the Sovereign Base Areas and an implementation mechanism. Ankara argues it must also reflect the sovereign equality and equal international status of the Turkish Cypriots, and that Turkish Cypriot security needs cannot be addressed by declaration. Greek Cypriot and EU texts argue for a system consistent with EU law and UN resolutions.

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World Agenda Review Editorial Team. (2026). “A Cyprus 'Without Guarantors and Without Intervention Rights'? What the 1960 Treaty of Guarantee Says About Whether It Can Be Scrapped.” World Agenda Review (worldagendareview.com). Published November 6, 2026. Retrieved from https://worldagendareview.com/cyprus-without-guarantors-can-treaty-of-guarantee-be-abolished-christodoulides