The Persian Gulf just became a lot more crowded. Iran has announced it’s dramatically expanding the area around the Strait of Hormuz where it claims military authority, now asserting control over more than 22,000 square kilometers. According to BBC reporting, this newly-created “Persian Gulf Strait Authority” has published a map showing Iranian armed forces oversight extending well into the territorial waters of Oman and the UAE.
The UAE wasn’t interested in playing along. Anwar Gargash, diplomatic adviser to the UAE president, dismissed Iran’s claims as “nothing but fragments of dreams,” arguing that Tehran is “trying to consecrate a new reality born from a clear military defeat.” It’s a blunt rejection, but the real question isn’t what the UAE thinks. It’s what happens next when a major shipping route becomes a battleground for competing claims of sovereignty.
Iran’s new authority insists that all transit through the strait now “requires coordination with and authorization from the Persian Gulf Strait Authority.” That’s a significant escalation. The US and its Gulf allies have already rejected this outright, with Washington explicitly telling ships not to comply with Iran’s rules. The US military has backed up these words with action, boarding the Iran-bound oil tanker Celestial Sea on Wednesday and conducting a search after suspecting it of violating an American blockade on Iranian ports.
The Blockade Tightens as Rhetoric Heats Up
The interception of the Celestial Sea isn’t an isolated incident. According to Centcom, US forces have redirected 94 commercial ships and disabled four vessels since the US blockade came into effect on April 13. These numbers paint a picture of an increasingly militarized shipping corridor where normal commerce has become something closer to a contested zone.
What’s particularly striking is the timing. Iran’s territorial claims come just as diplomatic efforts appear to be gaining traction. Donald Trump said on Monday that he was holding off a military attack planned for Tuesday after receiving requests from the leaders of Qatar, Saudi Arabia, and the United Arab Emirates. The president indicated that “serious negotiations are now taking place” and suggested he’d wait a few days for Tehran to respond to new proposals, though he left little doubt about his willingness to resume strikes if talks fail.
Pakistan’s military chief is reportedly visiting Tehran on Thursday in an attempt to mediate between Iran and the US. Iranian state media confirms that discussions with senior Iranian officials are ongoing, and the foreign ministry says it’s reviewing the latest American proposals for ending tensions. Yet even as these back-channel conversations happen, Iran is making bold territorial claims that seem designed to demonstrate strength rather than flexibility.
A Convention Iran Never Signed
Here’s where the legal picture gets murky. Under the United Nations Convention on the Law of the Sea, ships are guaranteed safe passage through another country’s waters. The catch: Iran hasn’t ratified this convention, which means it operates somewhat outside the normal international framework for maritime law. That gives Tehran more room to act unilaterally, but it also means its claims lack the legitimacy that international agreement provides.
The real friction lies in what Iran is actually doing on the water. BBC Verify analysis of footage published by media linked to Iran’s Islamic Revolutionary Guard Corps shows what appears to be a “punishment” strike on a tanker in early May. The vessel in the video matches key characteristics of the Barakah, a Liberian-flagged tanker whose operators reported it had been struck by unknown projectiles. If Iran is indeed conducting attacks on commercial shipping, then the expanded territorial claim isn’t just rhetoric. It’s backed up by force.
This is where the situation becomes genuinely dangerous. You have Iran asserting new claims of sovereignty, the US enforcing a blockade on Iranian ports, and both sides demonstrating their willingness to use military means to enforce their positions. The Strait of Hormuz handles roughly a third of the world’s maritime oil trade. When major powers start drawing lines across it, the implications ripple far beyond the region.
The Window for Diplomacy Narrows
Trump’s willingness to pause military action suggests that someone believes negotiations might work. But Iran’s territorial expansion sends a conflicting signal. Why expand your claimed authority over a vital shipping route right when you’re supposed to be making peace? One interpretation: Iran wants to negotiate from a position of apparent strength, demonstrating that it can take and hold territory if needed. Another: hardliners within the Iranian system are determined to establish facts on the ground regardless of what diplomats agree to.
The next few days could prove decisive. Trump has made it clear the US is ready to move quickly if talks break down. Pakistan’s mediation efforts suggest there’s still a path forward, but paths can disappear fast when military escalation begins. The question isn’t really whether Iran has the right to claim sovereignty over the Strait of Hormuz. The question is whether the international community, led by the US, will tolerate it. And so far, the answer has been a firm no.
What remains unclear is whether either side genuinely wants a settlement or whether they’re simply waiting for the moment when talking stops and the real confrontation begins.
