the conversation gap — the ceasefire that lasted three weeks
On July 6 and 7, projectiles struck the Qatari-owned LNG tanker Al Rekayat and the Saudi-flagged supertanker Wedyan in the Strait of Hormuz. Within 24 hours, Iran's Revolutionary Guard Corps had hit a third vessel. Two days later, President Trump declared the ceasefire with Iran over. Within a week, the U.S. Treasury had reimposed sanctions it had lifted less than a month earlier, CENTCOM had struck more than 80 Iranian military targets, and traffic through one of the world's most consequential waterways had fallen from 147 ships a day to 22. The agreement meant to prevent exactly this had been signed on June 17.
That agreement was the Islamabad Memorandum of Understanding, a 14-point framework signed remotely by President Trump and Iranian President Masoud Pezeshkian and brokered by Pakistan and Qatar. It set a 60-day window, due to expire in mid-August, to negotiate a permanent end to the war that began in late February. Within three weeks, it was functionally dead. The more instructive question is not who broke faith first, but what the document itself said, and what it deliberately left unsaid.
The clause that mattered most concerned the Strait of Hormuz, the 21-mile-wide channel between Iran and Oman through which roughly 20% of the world's seaborne oil moves. The memorandum committed Iran only to "best efforts" for safe passage, with no charge for 60 days only, and left unresolved who would set the routes ships were required to follow. Point 5 stated merely that Iran would "make arrangements" for passage — language loose enough that Iran's chief negotiator, parliamentary speaker Mohammad Bagher Ghalibaf, later invoked it directly to justify Iran's conduct, writing that "the era of one-sided deals is over."
The ambiguity was not incidental; it was inherited. Before the war, Iran had already built a toll apparatus for the strait — the Persian Gulf Strait Authority, established in early May, charged ships $1 million to $2 million per voyage depending on vessel size and cargo, requiring advance disclosure of ownership, insurance, and crew manifests before issuing a passage permit. Iran's foreign ministry has guarded the vocabulary since: it does not charge tolls, its spokesman has maintained, though "services" it provides "require charging fees." The memorandum suspended that regime for 60 days. It did not dismantle it, and it did not resolve whether Iran's underlying claim to control passage was legitimate at all. Under the UN Convention on the Law of the Sea, ships hold a right of transit passage through international straits, and a coastal state may not charge purely for that passage — a legal question the memorandum left entirely untouched.
Washington's own position on fees has been no steadier, which is part of why the ambiguity held rather than resolved. Secretary of State Marco Rubio spent late June touring Gulf states rejecting the idea of any toll on the strait, arguing that a fee by another name remains a toll. On July 13, President Trump reversed that position, proposing the U.S. Navy charge a 20% fee on cargo transiting Hormuz in exchange for protection; he abandoned the proposal a day later while proceeding with a naval blockade of Iranian shipping regardless. The International Maritime Organization, the U.N. agency responsible for the rule, stated that it "stands firmly against charging fees for passage through straits" used for international navigation. Two governments spent a month contesting the right to charge for a passage that international law says neither one is entitled to charge for.
the enforcement gap
The dispute escalated because each side acted on its own reading of the same silence. On June 27, the U.S. Navy's Joint Maritime Information Center announced a widened southern route through the strait along Oman's coast — a move that expanded traffic in both directions and functioned, in effect, as a direct challenge to Iran's claimed authority over the waterway. Iran called it a violation of the arrangements clause. Separately, Israel continued strikes in southern Lebanon, a theater the memorandum also purported to cover despite neither Israel nor Hezbollah having signed it; Iran cited those strikes as its own violation and re-closed the strait days later.
By the time the IRGC fired on the two tankers on July 6, both ships had reportedly gone dark, their navigation systems switched off, and were said by the Guard to have attempted passage through an unauthorized route. Iran framed the strikes as enforcement of arrangements it believed the memorandum entitled it to make. Washington framed the same strikes as an unprovoked attack on commercial shipping and a ceasefire violation. Both readings are internally consistent with the same 14 points, which is the design flaw made visible: a text loose enough to secure two signatures rarely stays loose enough to survive contact with an actual ship crossing an actual strait.
There is a second enforcement problem beneath the first. Iran's civilian negotiators — Pezeshkian and Foreign Minister Abbas Araghchi — have pursued the memorandum to secure sanctions relief and access to billions of dollars in frozen assets, the price of a war economy running out of alternatives. IRGC commanders, according to regional analysts, have regarded any concession to U.S. naval forces as a threat to institutional survival rather than a diplomatic tradeoff worth making. Iran signed the memorandum through one chain of command and enforced the strait through another, and compliance was never fully within the civilian negotiators' authority to guarantee. The International Crisis Group put the resulting dynamic plainly in a July 14 newsletter: both sides have used force to impose their own reading of the agreement's terms.
The pattern repeated rather than resolved. On July 12, the IRGC Navy declared the strait closed after firing warning shots at a vessel it said had attempted an unauthorized route. The following day, two more tankers — the al-Bahiya and the Mombasa, both linked to the United Arab Emirates — were struck by Iranian missiles inside Omani territorial waters; an Indian crew member aboard the Mombasa was killed. The IRGC said the vessels had switched off their navigation systems and attempted what it called a mined route. Each strike drew a U.S. response in kind: after the July 6–7 attacks, CENTCOM launched a wave of strikes against Iranian military sites near the strait, and the Treasury reimposed the oil sanctions it had lifted three weeks before. The consequences showed up in shipping data before they showed up in any headline. Kpler, a firm that tracks global commodities, recorded just 22 ships crossing the strait on July 9, against 147 crossings a day before the war began on February 28. War-risk insurance premiums for the strait, which stood at 0.125% of a ship's insured value before the conflict, had already climbed to between 0.2% and 0.4% per transit ahead of this latest round.
the deferral problem
The memorandum's third flaw was structural rather than semantic: it bundled the hardest questions together and pushed all of them past the signing date. Iran's nuclear program, the size and disposition of its enriched uranium stockpile, the specifics of sanctions relief, and the release of frozen assets were all designated for follow-up talks rather than settled in the text itself. That is a meaningful departure from the 2015 Joint Comprehensive Plan of Action, which took nearly two years of formal negotiation but confined itself to a single bargain — nuclear restrictions in exchange for sanctions relief — and secured the backing of the United States, China, France, Germany, Russia, and the United Kingdom. The Islamabad memorandum was bilateral, negotiated in a matter of weeks by two governments actively exchanging strikes, and asked to resolve Hormuz, Lebanon, sanctions, and the nuclear file all at once.
Layered on top of that bundling is a provision allowing the 60-day negotiating window to be extended by mutual agreement. Regional analysts have already identified this clause as the memorandum's most durable feature — not a bridge to a settlement, but a mechanism that lets both governments defer collapse indefinitely without resolving what the deal was meant to fix. A deal that can always be extended is a deal that never has to be finished.
The contrast with the 2015 framework is instructive precisely because both agreements addressed the same underlying problem — an Iranian nuclear program the United States wanted curtailed — through very different architecture. The JCPOA ran to more than 100 pages across its main text and technical annexes, and built in a dedicated dispute-resolution mechanism among its signatories, the Joint Commission, to arbitrate compliance questions before they escalated into unilateral action. The Islamabad memorandum ran to 14 points and left compliance disputes to be settled by whichever side had more force available at the moment. One framework was built to survive disagreement. The other was built to stop the shooting long enough to secure a signature, and treated everything else as a problem for the following 60 days.
what sixty days actually bought
As of this week, the U.S. Navy has reinstated its blockade of Iranian shipping, President Trump has floated and then withdrawn a proposal to charge a 20% fee on cargo transiting the strait in exchange for naval protection, and the International Maritime Organization has stated there is no legal basis to introduce mandatory tolls simply to transit a strait. Oil prices have climbed back above $87 a barrel. None of the memorandum's underlying questions — who controls passage through Hormuz, what becomes of Iran's uranium stockpile, how sanctions relief is sequenced — have been settled. The 60-day clock, unextended, runs out in mid-August. Whether it is extended again will say more about what the memorandum was actually built to do than anything written in its original 14 points.
