On 23 May 2026, President Trump stated that a deal with Iran to reopen the Strait of Hormuz was “largely negotiated” and would be announced shortly. Reporting in CNBC and follow-up coverage indicates the contemplated instrument is a memorandum of understanding containing language that would lift the restrictions on the Strait of Hormuz — including unrestricted navigation by vessels and the lifting of the United States naval blockade — and that would open a sixty-day negotiation window to address the Iranian nuclear programme, including the disposition of the stockpile of highly enriched uranium. Vice President JD Vance characterised the signature question as “TBD,” noting that the parties were still negotiating “a couple of language points.” The Iranian Fars news agency responded that the Strait of Hormuz would remain under Iranian management and dismissed the “largely negotiated” characterisation as “incomplete and inconsistent with reality.”
This is the most advanced the diplomatic process has been at any point the site has covered. It also has a specific structure that this site is positioned to read carefully, because the contemplated MOU appears to separate the chokepoint reopening from the institutional configuration of the chokepoint in a way that maps directly onto the analytical distinction the site has been drawing since the 15-vs-14 geometry post. This post reads the contemplated deal structure and explains why the gap between “reopening” and “institutional configuration” is the thing to watch as the MOU moves toward signature.
The two-layer structure of the contemplated deal
The contemplated MOU has, on the available reporting, a two-layer structure. The first layer is the immediate-reopening layer: language lifting the restrictions on the strait, unrestricted navigation by vessels, and the lifting of the United States blockade. The second layer is the sixty-day-negotiation layer: a defined window to address the nuclear programme and the highly-enriched-uranium stockpile. The two layers are sequenced — reopening first, nuclear negotiation following — which is the structure the Iranian 14-point proposal analysed in the mechanism-language post insisted on (settle Hormuz and end the war first, defer the nuclear question) and which the earlier United States 15-point proposal analysed in the 15-vs-14 post had resisted.
The movement of the United States position toward accepting the Iranian sequencing is the substantive diplomatic development. It suggests that the deadlock the ten-day-test post documented in early-to-mid May has been at least partially broken by the United States accepting the Iranian priority ordering. The reopening comes first; the nuclear question follows in the sixty-day window.
What “reopening” specifies and what it leaves open
The first layer’s language — lifting restrictions, unrestricted navigation, lifting the blockade — specifies the operational status of the strait (open) without specifying the institutional configuration that produces and maintains that status. This is the same gap the site identified in the United States 15-point proposal: the United States ask of “reopening” describes a desired output without describing the structure that produces it.
The Fars response is precisely targeted at this gap. The Iranian statement that the strait “would remain under Iranian management” is an assertion that the institutional configuration — the PGSA, the toll arrangement, the twelve-article statute analysed in the sovereignty-law post — survives the reopening. In the Iranian reading, the MOU lifts the blockade and restores navigation while leaving the PGSA arrangement in place as the management structure. In that reading, “unrestricted navigation” means navigation that is unrestricted by the United States blockade, not navigation that is unrestricted by the Iranian permission-and-fee arrangement.
The gap between the two readings of “reopening” is the entire institutional question. If the MOU’s “unrestricted navigation” language means UNCLOS free transit passage — no permission requirement, no fee beyond services charges, equal access — then the PGSA arrangement is incompatible with the MOU and the institutional configuration changes. If the MOU’s “unrestricted navigation” language means only the removal of the United States blockade, with the PGSA arrangement remaining as the management structure, then the institutional configuration does not change and the deal reopens the strait into the bifurcated arrangement that the bifurcating-strait post documented. The “couple of language points” Vice President Vance referred to are, on the site’s reading, very likely to be exactly this: the precise meaning of the navigation and management language, which determines which institutional configuration the reopening produces.
Why the language points are not minor
It would be easy to read “a couple of language points” as diplomatic detail — the final wordsmithing that always precedes signature. The site’s reading is that these particular language points are not detail; they are the substance. The difference between “the strait is open and managed by the PGSA on Iranian terms” and “the strait is open under UNCLOS free transit passage on equal-access terms” is the difference between the two institutional configurations the entire crisis has been about. The MOU can be signed with language that resolves this question in either direction, or with language ambiguous enough that both parties can claim their preferred reading — which is the diplomatic path of least resistance and also the path that leaves the institutional question unresolved past signature.
The site has seen this pattern before in the crisis. The 14-point proposal’s “new mechanism for the Strait of Hormuz” placeholder, analysed in the mechanism-language post, was deliberately ambiguous between the unilateral-framework reading and the treaty-backed-authority reading. The Trump-Xi summit’s “no charge for transiting” line, analysed in the Trump-Xi post, was precise on one point (no prohibited transit charge) and silent on the services-fee question. The contemplated MOU’s “unrestricted navigation” language is the third instance of the same pattern: a phrase that resolves the operational-status question and leaves the institutional-configuration question to be read in different ways by the different parties.
The signature question
Vice President Vance’s “TBD” on whether the President will sign is consistent with the institutional reading. If the language points were genuinely minor, signature would not be in question; the President would sign and announce. The fact that signature is “TBD” while “a couple of language points” remain open indicates that the open points are consequential enough that the United States is not prepared to commit to the instrument until they are resolved. The most consequential open point, on the site’s reading, is the institutional-configuration question embedded in the navigation language.
The Iranian Fars response — characterising the “largely negotiated” framing as “incomplete and inconsistent with reality” and insisting the strait remains under Iranian management — is the Iranian negotiating position on exactly this point, stated publicly to constrain the United States reading of the navigation language. Each side is, in effect, litigating the meaning of the reopening language in public ahead of signature, because each side understands that the language determines the institutional outcome.
What a durable reopening would require
The site’s reading of what would make the reopening durable, rather than a reopening into the bifurcated arrangement, is unchanged by the contemplated MOU. A durable reopening requires that the institutional configuration of the strait be settled, not deferred. The MOU’s two-layer structure defers the nuclear question to a sixty-day window, which is a reasonable sequencing of the nuclear question. It does not, on the available reporting, contain a parallel structure for settling the institutional configuration of the chokepoint, which is the question the site has been arguing is the through-line of the entire crisis.
The MOU could include a third layer that does for the chokepoint institution what the second layer does for the nuclear question: a defined negotiation window, with a named working group, to convert the “new mechanism” placeholder into a working institutional configuration on equal-access terms. The Oman dimension analysed in the post on the other shore of the strait is the natural framework for that third layer, because the two-bank geography requires a joint riparian arrangement that neither Iran nor Oman can operate alone. A sixty-day window to negotiate a Malacca-style cooperative arrangement among the riparian states, the user states, and the operator class, running in parallel with the sixty-day nuclear window, would convert the reopening from an operational event into an institutional settlement.
Without that third layer, the contemplated MOU reopens the strait into the institutional configuration that exists at the moment of reopening, which is the PGSA arrangement. The blockade lifts, navigation resumes, and the bifurcation between the compliant fleet and the holding queue either persists or is resolved in Iran’s favour by default, because no alternative institutional configuration has been negotiated to replace the PGSA. The reopening, in that case, is real but not durable: it restores flow without resolving the structure, and the structure is what determines whether the flow is stable.
What the site is watching
The contemplated MOU is the most significant diplomatic development of the crisis, and the site reads it as genuine progress on the operational-status question and the nuclear-sequencing question. The institutional-configuration question — the meaning of the navigation and management language, and whether the MOU contains a structure for settling the chokepoint institution rather than deferring it — is the thing the site is watching as the instrument moves toward signature. The comparison page sets out the institutional configuration that a durable reopening would settle on. The rate schedule prices transit under that configuration. The calculator prices a specific transit. The “largely negotiated” deal is the moment at which the institutional question moves from analysis to drafting; the language points are where the answer will be written.
Sources: CNBC, “Trump says Iran deal reopening Strait of Hormuz ‘largely negotiated,’ will be announced soon,” 23 May 2026; CNN live updates, “US and Iran reach tentative agreement though Trump hasn’t signed off on it,” 28 May 2026; Iranian Fars news agency response to the “largely negotiated” characterisation, 23 May 2026; statements by Vice President JD Vance on the memorandum-of-understanding signature question; this site’s prior analyses on the 14-point mechanism language (4 May), the 15-vs-14 geometry (4 May), the ten-day test (15 May), the Trump-Xi summit (15 May), the PGSA on the Suez/Panama yardstick (19 May), the bifurcating-strait post (20 May), the twelve-article statute (23 May), and the companion post on the other shore of the strait.