Iran reasserts sovereign claim over the Strait of Hormuz as regional shipping tensions resurface

At 11:22 UTC on 18 June 2026, Iran's foreign ministry spokesman Ismail Baqaei told Al Jazeera that the reopening of the Strait of Hormuz "is clearly Iran's responsibility," restating a position Tehran has held in various forms for decades and pushing back against any broader multilateral framing of the waterway. Seven minutes earlier, Fars News had reported the same point from the foreign ministry podium in even starker jurisdictional terms: "The issue of the Strait of Hormuz is the responsibility of Iran and Oman. Only Iran and Oman are the 2 coastal states of the Strait of Hormuz."

The remarks, delivered in the same hour and to overlapping audiences, amount to a coordinated diplomatic signal. Tehran is asserting, in plain language and in English, that a corridor through which roughly a fifth of the world's seaborne oil passes is not a global commons to be policed by outside powers but a bilateral arrangement between the two states on its northern and southern shores. The claim is contested, technically and legally, by almost every other government with a fleet in the Gulf — and the way the world reads it will shape insurance rates, tanker routings and the credibility of any future deal over Iran's nuclear file.

A two-state doctrine, restated

Iran's argument is straightforward, and on its face, geographically so. The strait narrows to about 33 kilometres at its tightest point, with Iran controlling the northern shore and Oman the southern. Tehran and Muscat are the only two states with a coastline on the waterway. From that physical fact, Iranian diplomacy draws a sweeping conclusion: the rules of passage, the security regime, and the question of when the strait is "open" or "closed" are matters for those two governments to settle between themselves.

That framing is not new. Successive Iranian governments have insisted on a bilateral approach, often in pointed contrast to the position of the United States and its Gulf allies, who have for years insisted on the strait's character as an international strait under the United Nations Convention on the Law of the Sea, where transit passage must not be impeded. The United States Fifth Fleet, headquartered in Bahrain, has for decades conducted operations explicitly framed around keeping the strait open to all comers. The June 18 statements sit inside that long-running argument; what is notable is the timing and the venue.

Baqaei chose Al Jazeera for the English-language rollout, ensuring the message would reach Gulf Arab, Western and Asian audiences simultaneously. Fars, the outlet closest to Iran's hardliners, ran the domestic version with the two-state language front-loaded. Tasnim, the English-facing service of the Islamic Revolution Guards Corps-linked media complex, syndicated the same line within minutes. The triangulation is deliberate: one message, three registers, one hour.

Why the wording matters

The phrase "reopening" is doing significant work in the Iranian messaging. It implies that the strait has, at some point and for some reason, been closed — or at least that its normal operating status has been disrupted. Tehran has used similar formulations during periods of heightened tension in the past, most recently during episodes in 2019 and earlier in the 2020s when Iranian naval forces seized commercial tankers and Western navies responded with enhanced patrols. The word choice lets Tehran claim the role of gatekeeper without having to make a specific, falsifiable threat.

It also lets Tehran position Oman, the sultanate's quiet, Gulf-Arab diplomacy is widely seen as the principal Western and Asian interlocutor with Iran, as a co-author of whatever security regime eventually governs the corridor. Muscat has historically preferred quiet, back-channel management of the strait question and has, on several occasions, hosted or relayed negotiations that more visible Gulf capitals refused to touch. By embedding Oman in the formula, Iran raises the cost for any future US or European effort to assemble a coalition that sidelines the sultanate.

The legal terrain here is well-trodden but unresolved. The 1982 UN Convention on the Law of the Sea designates certain straits used for international navigation as subject to a regime of transit passage that coastal states may not suspend. The United States, despite not having ratified the convention, accepts the transit-passage regime as customary international law. Iran, a signatory, formally accepts the same text — which is why Iranian officials typically couple their sovereignty claims with assurances that commercial shipping will not be impeded, and reserve any disruption for situations framed as self-defence or retaliation.

The counter-narrative from outside the strait

Outside Iran and Oman, the dominant framing treats the strait as the world's most important oil chokepoint and therefore as a global public good. The US Navy's Bahrain-based Fifth Fleet exists to underwrite that framing in practice. Saudi Arabia, the United Arab Emirates, Qatar, Iraq, Kuwait and Bahrain all export crude and LNG through the strait and have a direct interest in keeping it open on terms that do not leave them dependent on Iranian goodwill. India, China, Japan and South Korea, the largest importers of Gulf hydrocarbons, share that interest.

For these governments, the Iranian two-state doctrine is at best incomplete and at worst a license to extract concessions. A strait whose security is administered bilaterally between Tehran and Muscat is a strait in which every other user becomes, in effect, a supplicant. The European Union's naval mission in the region and the Combined Maritime Forces coalition, both of which predate the current tensions, are concrete expressions of the view that the strait's governance cannot be left to the two coastal states alone.

The counter-narrative is not, however, monolithic. Several Gulf states have hedged in recent years, building pipeline alternatives — the UAE's Habshan-Fujairah route, Saudi Arabia's East-West pipeline to Yanbu — specifically to reduce exposure to a Hormuz closure. Those investments imply that even some of the loudest external voices do not fully trust the existing multilateral framework to keep the strait open under stress. In that sense, the Iranian claim is less a provocation than a public naming of a reality that infrastructure planners have already accepted.

What a coordinated Iranian signal does next

The June 18 messaging comes against a backdrop that this publication has tracked closely: periodic seizures of commercial tankers, drone and proxy attacks on shipping, and intermittent diplomatic openings over Iran's nuclear programme. Each time the strait's status enters the headlines, the same question returns: who, exactly, has the authority to say whether the waterway is open, and on what terms.

The structural answer, for now, is that authority is shared and contested. The transit-passage regime under UNCLOS gives every state a right of continuous and expeditious passage; Iranian gunboats and Revolutionary Guard Navy fast boats have, at various points, tested the limits of that right. The United States and its allies have responded with operational patrols and legal protests. Oman has acted as a quiet back-channel. The June 18 statements do not change that equilibrium, but they sharpen it: Tehran wants the world to read the strait as an Iranian-Omani matter first, and a multilateral one second, if at all.

That is a position with costs. Foreign investors and tanker insurers price risk; the clearer Tehran makes its jurisdictional claim, the more clearly underwriters will price a binary risk into Gulf shipping premiums. It is also a position with leverage. If a future negotiation over Iran's nuclear programme or its regional posture produces an agreement, the shape of any deal will be influenced by whose framing of the strait prevails at the table.

What the framing leaves out

The most important uncertainty is also the most obvious: what, precisely, does Iran intend to do if its claim is not accepted? The June 18 statements assert responsibility without specifying consequences, a posture that preserves optionality. They do not name a foreign counterpart; they do not announce a naval exercise; they do not threaten specific vessels. They make a claim of jurisdiction in language calibrated for an international audience, then leave the next move to others.

A second uncertainty concerns Oman. The sultanate's public position, as of the most recent reporting available to this publication, is consistent with quiet management rather than open alignment with the Iranian doctrine. Whether Muscat has been consulted on the June 18 formulation, or is simply being cited as the natural co-anchor of a bilateral arrangement, is not visible in the available reporting. The omission matters, because the legitimacy of a two-state doctrine depends on both states actually owning it.

A third uncertainty is the reaction of the great-power customers. China is the single largest buyer of Gulf crude; its tanker fleet is the largest in the world; it has, in recent years, deepened its security cooperation with both Iran and the Gulf Arab states. How Beijing reads the June 18 statements, and whether it treats them as a problem or an opportunity to position itself as the indispensable external guarantor of Gulf shipping, will shape the next phase of this contest more than any Western statement.

For now, the strait remains open. Tankers are moving, insurance markets are functioning, and no incident has been reported in the hours since the Iranian statements. But the diplomatic line drawn on 18 June is sharper than the one drawn in most recent episodes, and sharper lines tend, in this part of the world, to be tested.

This publication tracks the strait's status through Iranian, Omani, US Navy and wire-service reporting, and reads Iran's two-state doctrine as a long-running posture reasserted under current conditions rather than a new departure.

Wire provenance

This editorial synthesis draws on the following public wire/social posts:

• https://t.me/Farsna
• https://t.me/tasnimnews_en
• https://t.me/FarsNewsInt
• https://t.me/Farsna
• https://t.me/tasnimnews_en
• https://t.me/FarsNewsInt
• https://t.me/Farsna
• https://t.me/tasnimnews_en