A reopened waterway remains open only on Tehran’s terms.
BANDAR ABBAS, Iran | June 2026
Iran has imposed new restrictions on vessels seeking to cross the Strait of Hormuz, creating fresh uncertainty only days after Tehran and Washington announced an understanding intended to restore commercial traffic. The Persian Gulf Strait Authority said only ships submitting compliant transit requests would be allowed to pass through the strategic waterway. Reports of warning shots and unanswered radio calls initially fueled claims that Iran had closed the strait again. The confusion has exposed the fragility of the emerging diplomatic framework and the distance between a political announcement and safe maritime operations.
The first warnings appeared when vessels approaching the area were reportedly advised not to continue toward the passage. Iranian activist Ilia Hashemi said warning fire had been heard and ships were receiving messages suggesting that access had been suspended. He later reported that the gunfire had stopped, but crews seeking clarification by radio were not receiving clear responses. This combination of military signals, administrative statements and operational silence left shipping companies unable to determine whether the waterway was technically closed or selectively accessible.
Iranian authorities subsequently announced that ships could transit during the declared negotiation period if they submitted requests meeting the new requirements. Vessels must provide information at least 48 hours before passage so Iranian officials can coordinate routes and crossing times. Tehran says the procedure is necessary because of continuing navigational risks, including the reported presence of sea mines and disrupted maritime conditions. The requirement effectively gives Iran greater control over which ships enter the strait and under what timetable.
Iran has said it will waive security, environmental, insurance and navigation fees during the 60-day negotiation period established with the United States. The temporary exemption appears designed to demonstrate compliance with the political commitment to reopen the passage without imposing immediate tolls. However, commercial operators remain concerned that the application process could become a mechanism for selective access or political pressure. A waterway may be formally open while remaining operationally restricted if vessels cannot obtain predictable approval.
The Strait of Hormuz is one of the most important maritime corridors in the global economy. A substantial share of internationally traded oil and liquefied natural gas moves through the narrow passage connecting the Persian Gulf with the Gulf of Oman. Any interruption affects producers including Saudi Arabia, the United Arab Emirates, Kuwait, Iraq and Qatar, while creating consequences for consumers across Asia and Europe. Shipping uncertainty can increase crude prices, freight rates and insurance costs even before physical supplies decline.
The latest confusion emerged after the United States began lifting its blockade of Iranian ports under the recent memorandum signed by President Donald Trump and Iranian President Masoud Pezeshkian. Washington expected Tehran to restore secure and unrestricted commercial passage as part of the arrangement. Iran maintains that the American withdrawal remains incomplete and that several political and military conditions have not yet been fulfilled. Those disagreements have transformed implementation into a contest over timing, interpretation and leverage.
Tehran has also linked the maritime situation to Israel’s continuing military presence in southern Lebanon and the unstable ceasefire with Hezbollah. Iranian officials argue that the regional commitments surrounding the agreement cannot be separated from one another. The United States, by contrast, wants the strait reopened independently of disputes involving Israel, Lebanon or other armed actors. This difference allows each side to accuse the other of violating the spirit of the memorandum without formally abandoning it.
Planned negotiations between Iran and the United States in Switzerland have already been postponed amid the renewed tensions. The delay weakens confidence that the 60-day framework will produce a more comprehensive agreement on Iran’s nuclear program and regional security. Diplomatic progress depends on practical steps that demonstrate compliance, and the Strait of Hormuz was expected to provide the earliest visible test. Instead, it has become evidence of how quickly the process can stall.
Some maritime traffic has resumed, but normal operations remain far from restored. Verified vessels have crossed the passage since the agreement, showing that Iran has not imposed a complete and permanent shutdown. Hundreds of commercial ships, however, remain delayed or anchored because operators are unwilling to expose crews, cargo and vessels to uncertain military and legal conditions. Shipping companies require more than political assurances because a single incident can produce enormous financial and human consequences.
The reported presence of mines represents one of the most serious obstacles. Clearing a heavily trafficked channel requires specialized vessels, accurate mapping and cooperation among military and civilian authorities. Even unconfirmed reports can deter operators because insurers may refuse coverage or impose prohibitive premiums. Electronic interference and inaccurate navigation signals add another layer of risk for crews attempting to identify safe routes.
Iran’s new authority over transit requests also raises questions about international maritime law. The Strait of Hormuz is used for international navigation, and coastal states are generally expected to permit transit passage without arbitrary obstruction. Tehran can defend safety measures intended to prevent collisions or mine-related incidents, but other governments may challenge any system used to discriminate among vessels. The difference between legitimate coordination and political control will become central if restrictions continue.
Energy markets have reacted with volatility rather than outright panic. Oil prices declined after the initial United States-Iran understanding because traders expected greater supply and safer shipping. Conflicting reports from Hormuz interrupted that optimism, although prices remained below the peaks reached during the conflict. Markets are now responding to each operational update because the credibility of the agreement depends on whether tankers can actually move through the strait.
The crisis demonstrates that reopening a strategic waterway is not a single political act. It requires physical security, clear rules, functioning communication and trust among governments, shipping companies and insurers. Iran currently insists that passage remains available, while the conditions surrounding that passage continue to create uncertainty. The strait is therefore neither completely closed nor fully open in the commercial sense understood by global markets.
The coming days will reveal whether the new transit system becomes a temporary safety mechanism or the foundation of long-term Iranian control. If ships begin crossing regularly, the confusion may gradually recede and diplomatic talks could resume. If approvals remain inconsistent or military warnings return, the memorandum with Washington could unravel before substantive negotiations begin. Hormuz has once again become the place where diplomatic promises are tested against the realities of power.
Phoenix24: clarity in the grey zone. / Phoenix24: claridad en la zona gris.