Iran asserts control over Strait of Hormuz as nuclear talks progress

Mohammad Bagher Ghalibaf stepped off a plane in Tehran on Tuesday with a message that reframed one of the world's most consequential waterways. Iran's chief negotiator had just returned from talks in Switzerland, and he was announcing that the Strait of Hormuz—the narrow passage through which roughly one-fifth of global oil flows—would no longer operate under the old rules. Tehran would administer it now, he said, in accordance with international law. The declaration marked a significant shift in how Iran sees its role in the region, and it came as the country pursues an end to the conflict that has destabilized the Middle East for months.

The talks themselves had produced what both sides called progress. On Monday, Iran and the United States agreed to establish direct communication channels designed to prevent accidents and misunderstandings in the strait, ensuring that commercial vessels could pass through safely. The agreement followed the first serious round of negotiations aimed at halting the broader US-Israeli war on Iran. At the same time, Washington announced it would temporarily suspend sanctions on Iranian oil, a move Vice President JD Vance tied to Tehran's commitment to allow UN nuclear inspectors back into the country. These were concrete concessions, the kind that signal both sides believe negotiation is possible.

Ghalibaf's tone in a video posted to his Telegram account suggested cautious optimism. He highlighted several areas where the talks had yielded what he called "good achievements"—the strait itself, discussions about Lebanon, the question of oil sanctions waivers, and the matter of frozen Iranian assets. Yet he was careful not to overstate the moment. "We are still at the beginning of this work," he said, "and must continue our efforts." The message was clear: this was a foundation, not a finished structure.

The strait's status had been volatile. Iran had closed it at the start of the conflict, then reopened it last week after reaching an initial agreement with Washington. But on Saturday, Tehran shut it again in response to Israeli attacks in Lebanon, a reminder of how fragile the arrangement remained. The new communication protocol was designed to prevent such cycles—to create a mechanism where both sides could talk directly rather than escalate through military posturing or unilateral action.

By Monday, maritime traffic was already moving through the waterway at a faster pace than it had been before the agreement, according to shipping tracking firms. Tankers and cargo vessels were resuming normal routes, a sign that markets believed the corridor would remain open. The economic stakes were enormous. Any sustained closure of the strait would ripple through global energy markets and destabilize economies dependent on Middle Eastern oil.

What made Ghalibaf's assertion about Iranian administration significant was what it represented symbolically. For years, the United States and its allies had effectively guaranteed freedom of navigation through the strait, backed by naval presence and the implicit threat of force. Iran's declaration that it would now administer the waterway suggested a reordering of that balance—a recognition, at least in Tehran's view, that Iran's role in the region could no longer be ignored or sidelined. Whether that claim would hold depended entirely on whether the broader negotiations succeeded.

The unfreezing of Iranian assets and the sanctions relief on oil were also substantial. They represented Washington's willingness to offer material incentives to keep Iran at the negotiating table. But both sides knew these were preliminary moves. The real test would come in the weeks ahead, as negotiators tackled the harder questions: the scope of sanctions relief, the timeline for asset release, and the conditions under which Lebanon's conflict would end. Ghalibaf's stop in Oman on his way home—a country that shares the strait and has long played mediator between Tehran and Washington—underscored how much the region's smaller players were invested in seeing these talks succeed.

For now, the strait remained open, the communication lines were being established, and both sides had reasons to keep talking. But the fragility of the arrangement was evident in how quickly things could change. The next closure, the next escalation, the next breakdown in talks could reverse everything that had been gained in Switzerland. The real work, as Ghalibaf said, was just beginning.