The ambiguity meant to create space became a fault line instead.
Ten days after Iran and the United States signed a fourteen-point memorandum intended to ease decades of mutual suspicion, the agreement has begun to collapse under the weight of its own deliberate vagueness. In Lebanon, two contradictory ceasefire deals now pull against each other, leaving Iran and Hezbollah excluded from the second arrangement they believed the first had guaranteed them. In the Strait of Hormuz, undefined language about 'best efforts' and 'arrangements' allowed each side to claim legitimacy for incompatible interpretations of shipping rights, until a container vessel was struck and the evacuation plan suspended. What was designed as a bridge across mistrust has instead revealed how fragile peace becomes when adversaries agree on words but never on meaning.
- A memorandum meant to hold for sixty days fractured in ten, as the ambiguity intended to buy time instead handed each side a different document.
- Two ceasefire agreements in Lebanon now contradict each other directly — the second, brokered by Marco Rubio in Washington, erased the Iranian role that JD Vance had appeared to secure in Lucerne.
- Iran's Revolutionary Guards Navy unilaterally restricted Hormuz traffic to a single route, and the Ever Lovely was struck transiting the route Iran had just forbidden, forcing the IMO to suspend its evacuation plan entirely.
- Inside Tehran, even those who supported the memorandum are losing the argument — voices across the political spectrum now say the government should never have agreed to reopen the strait.
- The legal architectures that might have offered a durable path forward — UNCLOS frameworks, traffic separation schemes, navigational service charges — have been shelved as military escalation resumes and diplomats retreat.
Ten days. That was how long it took for the memorandum between Iran and the United States to begin coming apart.
The document had been deliberately vague on the hardest questions — the thinking being that trust, once started, would fill in the gaps. Instead, the ambiguity became a fault line. Each side read the same fourteen points and arrived at entirely different conclusions. By late June, fresh hostilities had broken out across the Gulf, and the architects of the deal were left defending a structure already in collapse.
The first fracture appeared in Lebanon. Talks in Lucerne, overseen by US Vice President JD Vance, had seemed to give Iran and Hezbollah a seat at the table through a new deconfliction mechanism. Then, days later, Secretary of State Marco Rubio brokered a second ceasefire in Washington — this one between Israel and the Lebanese government, signed by Prime Minister Nawaf Salam. The new deal excluded Iran and Hezbollah entirely, allowed Israel to remain in southern Lebanon indefinitely pending Hezbollah's disarmament, and contained language shielding Israel from war crimes prosecution. Netanyahu declared victory. Two agreements, each negating the other, now existed simultaneously.
The Strait of Hormuz proved equally unstable. The memorandum had committed Iran to making 'arrangements using its best efforts' to allow commercial vessels free passage for sixty days. The language was soft by design. Iran read it as confirmation of its dominant hand over the waterway. The IMO, working with Oman, believed they had secured something more concrete: a plan to evacuate hundreds of stranded ships via both a northern and southern route. IMO Secretary General Arsenio Domínguez thought the agreement was settled.
On Thursday morning, Iran's Revolutionary Guards Navy announced only the northern route would be permitted. That afternoon, the Ever Lovely, a Singapore-flagged container ship, was struck while transiting the southern route near Oman. Domínguez suspended the evacuation plan immediately, unwilling to risk seafarers' lives. The attack reflected a deeper Iranian concern: the southern route, hugging Oman's coastline, could give the United States leverage to break Iran's grip on the strait entirely.
Behind the immediate crisis lay a more patient conversation about legal frameworks — Oman was pushing for any long-term arrangement to be grounded in the UN Convention on the Law of the Sea, which would prohibit general tolls but permit designated shipping lanes and charges for specific navigational services. These were the kinds of architectures that might have offered a durable way forward. But as late June arrived, the bombing resumed, and those careful ideas were shelved.
Inside Tehran, even supporters of the memorandum were losing ground. Voices from across the political spectrum — not only hardliners — were arguing the government had made a mistake in agreeing to reopen the strait at all. The deal that was supposed to build trust through ambiguity had instead collapsed beneath it, leaving two countries that had signed a peace agreement ten days earlier back on the path to conflict, with no clear mechanism to pull them away.
Ten days. That was how long the memorandum lasted before it began to unravel.
On the surface, the document signed by Iran and the United States looked like a genuine attempt to step back from the brink. Fourteen points, carefully constructed, deliberately vague on the hardest questions—the thinking being that once trust began to build, the two sides could work out the details later. Instead, the opposite happened. The ambiguity that was meant to create space for negotiation became a fault line. Each side read the same words and saw something entirely different. By late June, fresh fighting had erupted across the Gulf, and the architects of the deal found themselves defending a collapsing structure.
The trouble started in Lebanon, where the memorandum had promised a new role for Iran and its proxy force, Hezbollah. The US vice-president, JD Vance, had overseen talks in Lucerne that seemed to give Tehran a seat at the table through a new deconfliction mechanism. It looked, for a moment, as though Israel might be sidelined. Then, days later, the Lebanese government and Israel signed a second ceasefire agreement in Washington, this one brokered by Secretary of State Marco Rubio. This second deal reversed everything. Iran and Hezbollah were excluded entirely. Israel would remain in southern Lebanon indefinitely, until Hezbollah surrendered its weapons—a condition the Shia militia could never accept. The agreement, signed by Lebanese Prime Minister Nawaf Salam, a former head of the International Court of Justice, also contained language that would shield Israel from war crimes prosecution for its actions in Lebanon. When Israeli Prime Minister Benjamin Netanyahu saw the terms, he declared victory: the country would stay in place until the weapons were gone. Two ceasefire agreements, pulling in opposite directions, each one negating the other.
The Strait of Hormuz proved equally intractable. The memorandum stated that Iran would "make arrangements using its best efforts" to allow commercial vessels safe passage for sixty days, with no charge. The language was deliberately soft—"arrangements" and "best efforts" left undefined. Iran interpreted this to mean it held the dominant hand in controlling traffic through the waterway. But the UN's International Maritime Organization, working with Oman, thought they had Iran's agreement to something different: a plan to evacuate hundreds of stranded ships by offering both a northern and southern route through the strait. IMO Secretary General Arsenio Domínguez believed the deal was done.
On Thursday morning, the Iranian Revolutionary Guards Navy announced that only the northern route would be permitted for ships exiting the strait. That afternoon, the Ever Lovely, a Singapore-flagged container ship, was struck while transiting the southern route near Oman. Domínguez immediately suspended the evacuation plan, saying the IMO would not risk seafarers' lives. Yet despite the attack, vessels continued to attempt passage through the waterway.
The attack likely reflected a deeper Iranian calculation: the southern route, running along Oman's coast, could give the United States a way to break Iran's grip on the strait. Behind the immediate crisis lay a longer conversation between Oman and Iran about how the waterway might be managed in the future. Oman was pushing for any solution to be framed within the UN Convention on the Law of the Sea, which would rule out tolls but did allow strait states to designate shipping lanes and traffic separation schemes. In theory, charges could be levied for specific navigational services if they provided direct benefit to a vessel, but no general levy was permitted. These were the kinds of legal architectures that might have provided a way forward.
But as June turned to late summer, the bombing resumed. The men of war had returned to center stage, and the careful legal frameworks—the creative ideas about how two adversaries might share control of a vital waterway—were shelved. Inside Tehran, even supporters of the memorandum were losing ground. Voices across the political spectrum, not just among hardliners, were saying the government should never have agreed to reopen the strait. The deal that was supposed to build trust through ambiguity had instead collapsed under the weight of it. Two countries that had signed a peace agreement ten days earlier were back on the path to conflict, with no clear mechanism to pull them back.
Citas Notables
We will stay in the area until Hezbollah's weapons and those of the remaining terrorist groups are dismantled.— Israeli Prime Minister Benjamin Netanyahu, responding to the second Lebanon ceasefire agreement
The IMO would not put seafarers at risk.— IMO Secretary General Arsenio Domínguez, halting the evacuation plan after the attack on the Ever Lovely
La Conversación del Hearth Otra perspectiva de la historia
Why did they make the language so deliberately vague? Wasn't that asking for trouble?
They were betting on something that didn't happen—that once the immediate crisis cooled, both sides would have enough breathing room to negotiate the details in good faith. The theory was sound. The execution assumed a level of trust that didn't exist.
So what went wrong with Lebanon specifically?
Two different ceasefire agreements, signed days apart, that contradict each other. The first one gave Iran a role. The second one excluded Iran entirely and let Israel stay indefinitely. You can't have both. One side had to lose.
And the strait?
Same problem, different context. Iran read "best efforts" to mean Iran decides who goes where. The maritime organization read it as Iran cooperating with an evacuation plan. When the IMO thought they had a deal, Iran changed the terms and attacked a ship.
Why would Iran do that? Doesn't that hurt them?
Because they saw the southern route as a way for the US to eventually break their chokehold on the waterway. Better to reassert control now than lose it later through a thousand small compromises.
Is there any way back from this?
Technically, yes. Oman and Iran are still talking about a long-term framework based on international maritime law. But the bombing has started again. Once that happens, the lawyers and diplomats get pushed aside.