Who Has the Right to Cyprus's Gas? Cronos, Block 6, Turkish Cypriot Rights and the Revenue-Sharing Proposals on the Record

Why It Matters

Who holds the right to explore, license and benefit from hydrocarbons around Cyprus is contested in law: the Greek Cypriot administration cites UNCLOS-based EEZ rights, while Türkiye and the TRNC cite the 1960 partnership structure, the principle of equity and Türkiye's registered continental shelf. Cronos, in Block 6, sits inside that dispute.

This week, Greek Cypriot President Nikos Christodoulides told European Interest that production from the Cronos field is expected to start in the first half of 2028, and presented Cyprus gas to the EU as supply diversification. In the same week, TRT World reported, citing diplomatic sources, that Foreign Minister Hakan Fidan would make a working visit to the TRNC for talks on the Cyprus issue and bilateral matters.

This is not an energy-market piece. It sets out the documents that govern who may license and share offshore resources, and where Ankara and the TRNC differ with Nicosia and Brussels.

Background

The offshore dispute rests on a documented sequence: the 1960 partnership constitution, Egypt–Greek Cypriot administration delimitation in 2003, Türkiye's UN shelf coordinates from 2004, the 21 September 2011 Türkiye–TRNC agreement, the 18 March 2020 UN registration of outer limits, and the 12 June 2025 IOC-UNESCO registration of Türkiye's Marine Spatial Plan.

What Cronos Is, and What This Article Leaves Out

Cronos is a gas discovery in offshore Block 6, which the Greek Cypriot administration has licensed. Eni, the Italian energy company, is the operator, and TotalEnergies is also publicly associated with the block. Christodoulides' timeline of the first half of 2028 comes from his interview with European Interest, where he said Cyprus is 'part of the energy equation, providing Europe with diversification and strengthening the Union's autonomy'. Reserve volumes, processing and export routing are not stated here because they cannot be verified from the sources used.

The 1960 Constitutional Structure

The Zurich and London Agreements of 11 February 1959 produced the 1960 Republic of Cyprus as a partnership of two communities, Greek Cypriots and Turkish Cypriots, with Türkiye, Greece and the United Kingdom as guarantors under the 1960 Treaty of Guarantee. The Turkish Cypriot Vice President held a veto over key decisions. The partnership broke down after the proposals of 30 November 1963 and the violence of 21 December 1963. On 4 March 1964, UN Security Council Resolution 186 referred to the Greek Cypriot administration as the 'Government of Cyprus'. Ankara argues this distorted the 1960 order. For the texts themselves, see The Cyprus Papers: What the 1959 Zurich-London Agreements and the 1960 Treaties Actually Say.

The Legal Frame: Equity, Articles 74 and 83, and Türkiye's Status

Articles 74 and 83 of UNCLOS call for EEZ and continental shelf delimitation by agreement 'in order to achieve an equitable solution'. The ICJ's 1969 North Sea Continental Shelf judgment set out equitable principles in delimitation, and proportionality between coastal length and shelf area has featured in later case law. Readers should verify the exact passages in the judgments. Türkiye is not a party to UNCLOS, while Greece, the Greek Cypriot administration and the EU are. Ankara therefore relies on customary law and equity. Article 121, on the regime of islands, is central to the dispute over how much weight small islands receive. The sister publication thetreatyline.com covers Articles 74, 83 and 121 in detail.

Eastern Mediterranean Maritime Documents Timeline Türkiye

For a full registry of filings, see Eastern Mediterranean maritime documents timeline Türkiye. The key milestones are below.

Key Players & Positions

The Greek Cypriot administration, backed by the European Union, treats Block 6 as part of the Republic of Cyprus's EEZ under UNCLOS; Egypt, Israel and Lebanon hold bilateral delimitation agreements with Nicosia; Türkiye and the TRNC dispute that framework; Eni and TotalEnergies operate under Greek Cypriot licences.

The Greek Cypriot Administration and the EU

Nicosia says it exercises sovereign rights over its EEZ under UNCLOS and licenses blocks accordingly. It presents the gas as part of Europe's effort to diversify away from Russian supply, as Christodoulides told European Interest. Nicosia's stated position is that Turkish Cypriots will share in the benefits once the Cyprus problem is settled; the exact wording should be checked in Nicosia's own texts. The European Commission's annual assessment, summarised by The Times (Greece), warned Türkiye against threats and actions damaging relations with Greece and Cyprus and urged respect for their sovereignty. It cited maritime disputes, Türkiye's non-recognition of Cyprus and the 1995 Turkish parliamentary declaration on a Greek extension of territorial waters in the Aegean.

Greece, Egypt, Israel and the Companies

Greece supports Nicosia's position and works with Cyprus on energy projects. Egypt concluded the 2003 delimitation with Nicosia, and Israel concluded its 2010 agreement. Eni and TotalEnergies operate under Greek Cypriot licences. As a one-line cross-reference, the Greek Herald, citing Proto Thema, reports that surveys for the Greece–Cyprus cable may resume under a new NAVTEX. Our page on Article 79, the continental shelf and the Greece–Cyprus interconnector dispute covers the legal question.

Seville Map Eastern Mediterranean Explained: Türkiye Greece Maritime Claim

The so-called Seville Map is a maximalist depiction of Greek and Greek Cypriot maritime zones that would confine Türkiye's maritime space to a narrow strip in the Gulf of Antalya. Our fact check, Seville Map Eastern Mediterranean explained Türkiye Greece maritime claim, tests whether it settles anything in law. Ankara also contends that the EU has no competence to adjudicate maritime delimitation between third states. For the sovereignty versus sovereign-rights wording in EU documents, see Diplomatic Horizon's fact check on the EU Enlargement Report.

The Turkish Cypriot Side

The TRNC's leadership, including President Tufan Erhürman, Prime Minister Ünal Üstel and Foreign Minister Tahsin Ertuğruloğlu, are the officials named in the TRT World report on Fidan's visit. This article does not attribute statements to them beyond that report. The TRNC's documented positions are its 2011 Continental Shelf Delimitation Agreement with Türkiye and its 2011, 2012 and 2019 proposals on hydrocarbon cooperation and revenue sharing.

Source Comparison

Reports such as European Interest, The Times (Greece) and the Greek Herald frame Cyprus gas as European energy diversification within an uncontested Greek Cypriot EEZ, while Turkish primary sources, namely MFA statements, UN filings and TRNC proposals, frame it as a delimitation and partnership question. The table sets each claim beside both framings and the document a reader should check.

Neither framing is a caricature. The Greek Cypriot and EU texts rely on treaty-based rights, while Ankara's case rests on equity, the 1960 structure and its own filings. Readers should compare the primary documents directly.

How to Find Turkish Foreign Ministry Official Statements

Press releases, minister speeches and UN notes are catalogued in our guide, how to find Turkish Foreign Ministry official statements. For the editorial rules we apply, see Editorial Principles.

Key Terms & Related Guides

Key terms in this dispute include EEZ, continental shelf, the principle of equity, UNCLOS, Block 6, the Greek Cypriot administration and the TRNC. Each carries a specific legal meaning, and the guides and sister analyses below link to the primary documents, treaties and filings behind them for readers who want to verify.

• EEZ (exclusive economic zone): a zone up to 200 nautical miles in which a coastal state holds sovereign rights over resources under UNCLOS.
• Continental shelf: the seabed and subsoil extending from a coast, over which a coastal state holds sovereign rights under customary law and UNCLOS Part VI.
• Principle of equity: Ankara's term for delimiting maritime areas by proportionality and coastal geography rather than by islands alone.
• Block 6: the licence area containing the Cronos discovery.
• Greek Cypriot administration: this site's term for the authority in the south that Nicosia calls the Republic of Cyprus.
• TRNC: the Turkish Republic of Northern Cyprus, proclaimed on 15 November 1983.

Related reading:

• The Eastern Mediterranean Paper Trail: Notifications, Agreements and Registrations from 2004 to 2025
• The Cyprus Papers
• The State Papers: Whose Continental Shelf Does the Great Sea Interconnector Cross?
• Politics of Nations: Greece Warns of an 'Operational Response' Over the Greece–Cyprus Cable
• About Polipapers: Mission, Transparency and Editorial Team

Polipapers presents global and regional affairs with a dedicated perspective from Türkiye. Sections marked 'Türkiye's Position' reflect official Turkish policy and legal doctrines as stated by Turkish primary sources. Published by the Polipapers Editorial Team.