IRGC Says 15 Ships Passed Hormuz With Its Permission

Iran’s Islamic Revolutionary Guard Corps Navy said Sunday that 15 vessels, including four oil tankers, transited the Strait of Hormuz in the preceding 24 hours — but only after “receiving permission and coordinating” with IRGC naval forces, Middle East Eye reported. The statement, distributed through the semi-official Fars News Agency, marks the clearest assertion yet that Tehran is operating a permit-based transit regime through the 21-mile-wide passage that carries roughly one-fifth of the world’s daily oil supply.

The IRGC warned that any cooperation with “hostile forces” in the strait would be considered an “imminent security threat” and would be “dealt with accordingly,” according to Middle East Eye. The language draws a direct line between compliance with Iran’s transit demands and physical safety, a message directed at both commercial shipping operators and the navies escorting them.

From Blockade to Permit System

The IRGC statement reframes the Hormuz situation from a blockade — which implies total closure — to a selective transit regime in which Iran decides which ships pass and under what conditions. The distinction matters. A full blockade invites immediate military response under international maritime law. A permit system, in which some traffic flows while Iran claims credit for allowing it, occupies a gray zone that is harder to challenge with force and easier to sustain diplomatically.

The 15-ship figure itself tells part of the story. In normal conditions, roughly 60 to 70 vessels transit Hormuz daily. Fifteen in 24 hours represents at most a quarter of normal traffic — a severe restriction that is nonetheless not a total shutdown. The inclusion of four oil tankers in the count suggests Iran is allowing enough crude to move to avoid triggering the most extreme price responses while retaining the ability to throttle the flow at will.

This approach is consistent with the blockade posture Iran has maintained since March, which has restricted transit without fully closing the strait. The difference now is that the IRGC is publicly claiming a permitting authority — asserting not just the physical capacity to block ships, but the legal right to decide which ones pass.

Big Tankers May Not Come Back

The selective transit regime is accelerating a structural shift in global shipping that may outlast the current crisis. MarketWatch reported that many of the largest oil tankers, the very large crude carriers (VLCCs) that form the backbone of Gulf-to-Asia and Gulf-to-Europe crude flows, remain stuck in or near the Strait of Hormuz — and their operators may not send them back once they are free, according to MarketWatch.

The economics are straightforward. A VLCC carries roughly two million barrels of crude oil, worth approximately $188 million at current Brent prices near $94 per barrel. The risk of an IRGC seizure, a denied transit, or a projectile strike — like the one that hit a cargo vessel in the Gulf earlier Sunday — makes the cost of routing through Hormuz increasingly difficult to insure and justify.

If the largest tankers permanently reroute away from the Gulf, the structural impact on oil markets would extend well beyond the current crisis. Longer routes around the Cape of Good Hope add roughly two weeks to a Gulf-to-Europe voyage, tying up tonnage, reducing effective global tanker capacity, and adding permanent cost to every barrel that once moved through Hormuz.

The $180 Scenario Gets Closer

The IRGC’s permit system raises the floor on oil price risk. Rystad Energy has projected that oil could reach $180 per barrel by August under a scenario combining prolonged Hormuz disruption with US-Iran re-escalation, OilPrice reported. That model assumed a contested strait. What the IRGC announced Sunday is arguably more destabilizing than a contested strait: it is a controlled one, in which the flow of oil depends on the daily decisions of an IRGC naval commander rather than the physics of a military standoff.

The permit system creates a new category of risk for traders. Under a blockade, the supply impact is binary — oil either flows or it does not. Under a permit regime, the supply impact is uncertain hour to hour. Fifteen ships today could be five tomorrow, or fifty, depending on Iran’s diplomatic temperature. That kind of uncertainty tends to push futures prices higher than a clean disruption, because traders cannot model the supply curve with confidence.

The threat is compounded by Iran’s simultaneous move to threaten closure of the Bab el-Mandeb Strait, the 20-mile-wide chokepoint at the southern end of the Red Sea. If Iran controls the flow through Hormuz and its Houthi allies restrict passage through Bab el-Mandeb, the two chokepoints that bracket Middle Eastern energy exports to global markets would both be operating at the discretion of Tehran.

”Hostile Forces” Warning

The IRGC’s warning that cooperation with hostile forces would be treated as a security threat is directed at two audiences. The first is commercial shipping companies considering US or allied naval escorts through the strait. The message is clear: accept an American escort, and your vessel becomes a target rather than a neutral transiter.

The second audience is the navies themselves. The US Fifth Fleet, based in Bahrain, has been conducting escort operations for commercial vessels in and around Hormuz. The IRGC statement effectively declares those escorts to be hostile acts that void the safe-passage arrangement. If a tanker transits under IRGC permission, it passes safely. If it transits under US Navy escort, the IRGC considers it a threat.

This framing forces shipping companies into a choice: comply with the Iranian regime and transit on Iran’s terms, or rely on US naval protection and accept the risk that Iran classifies the vessel as an enemy combatant. Neither option is cost-free, and both deepen Iran’s de facto authority over strait traffic.

What the Permit System Means

The distinction between a blockade and a permit regime has consequences that extend beyond shipping schedules. Under international law, the Strait of Hormuz is subject to the right of transit passage, which allows vessels to pass through international straits without coastal-state permission. Iran’s permit system directly contradicts that right by requiring ships to request and receive IRGC authorization before transiting.

No major maritime power has recognized Iran’s authority to impose such a system. But recognition is not required for the system to function. If commercial operators comply — and the 15-ship transit suggests some already are — the permit regime becomes a de facto reality regardless of its legal status. Every ship that asks permission before transiting Hormuz reinforces Iran’s claim to control the waterway.

The longer the permit system operates, the harder it becomes to reverse. Shipping companies that have built the IRGC coordination process into their operations will be reluctant to abandon it unilaterally. Insurers that have priced policies around the assumption of IRGC permission will resist covering vessels that transit without it. The legal fiction becomes commercial fact.

What To Watch

The key variable in the coming days is whether the 15-ship figure increases, holds steady, or drops. An increase would signal that Iran is using the permit system as a pressure-release valve — allowing enough traffic to avoid a military confrontation while maintaining its claim to authority. A decrease would signal tightening, potentially as leverage in the stalled diplomatic exchange with Washington.

Oil markets will price the permit system when trading resumes. The $94 Brent close on Friday did not account for Iran publicly claiming a permitting authority over Hormuz transits. Whether the market treats the 15-ship announcement as a partial reopening — bullish for supply — or as confirmation of Iranian control — bullish for price — will depend on how traders assess the sustainability and predictability of the regime.

The US Navy’s response is equally critical. If Central Command challenges the permit framework by escorting vessels through without IRGC coordination, the confrontation risk escalates sharply. If it does not, the IRGC’s authority over the strait hardens further with each passing day.

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For Iran’s threat to close a second chokepoint, see Iran halts US talks, threatens to close Bab el-Mandeb Strait. For the cargo vessel struck in the Gulf on Sunday, see Cargo vessel hit by projectile in Gulf near Iraq. For the broader Hormuz blockade context, see Iran resumes South Pars platforms as Hormuz blockade holds. For the stalled US-Iran deal, see Trump sends Iran deal back for revisions as oil tops $94.