18JUN

Rial bill, yuan portal, two ships

4 min read

10:02UTC

Iran's Majlis passed an 11-article Hormuz bill mandating rial-only fees; Brent fell 5.16% to $105.54 the same day Windward logged only two commercial transits through the strait.

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Key takeaway

Brent priced a diplomatic probability the strait did not honour.

Iran's Majlis National Security Committee passed an 11-article Strategic Action Plan for Hormuz and Persian Gulf Security, Mehr News Agency reported in Farsi on 20 May ¹. The bill mandates that all passage fees be collected exclusively in Iranian rial, bans vessels from nations 'that participated in the imposed war', requires war-damage reparations before such vessels may transit, and enforces compliance through seizure and 20 per cent cargo confiscation. The committee passed it; the Majlis has not scheduled a floor vote.

The rial-only clause cannot coexist with the operational reality. The PGSA (the IRGC-backed Persian Gulf Shipping Authority that administers Hormuz tolls) launched its vessel-submission portal on 18 May accepting yuan wire transfers up to $2 million per vessel and Bitcoin payments ; the formal fee schedule promised that day remains unpublished. If the bill is signed in its current form, Iran's legislature will have made its own enforcement mechanism unlawful in its own currency rules. Beijing has been paying through the yuan channel the legislature now wants to ban.

Brent Crude settled at $105.54 on Wednesday 20 May, down 5.16 per cent from the $111.22 close on Tuesday 19 May. The $5-per-barrel spread between Brent and the IEA's May projection of $106, which Goldman Sachs and Morgan Stanley had identified as a structural insurance premium, compressed to near-parity in a single trading session . The market priced diplomatic optimism the waterway did not honour: Windward's maritime tracker logged only 2 commercial transits through the strait on 20 May, down from 7 on 19 May and against a pre-crisis baseline of roughly 95 per day ². Roughly 18 million barrels of crude per day that normally moves through Hormuz sat in anchorage or was diverted onto slower routes.

Lloyd's of London's Joint War Committee still conditions the reopening of Hormuz war-risk cover on written rules of engagement from either the 26-nation coalition or PGSA ; hull rates priced at 110-125 per cent of vessel value on the secondary market. The Majlis rial bill adds a second governance incompatibility on top of the missing tariff: a coalition ROE cannot mention rial without conceding Iranian sovereignty over the strait, and a PGSA ROE that names rial blocks the yuan channel Chinese buyers depend on. The benchmark fell 5.16 per cent in screen terms while the physical waterway carried two vessels. One kinetic event or a defeated Senate floor vote and the structural premium re-emerges by Saturday.

Deep Analysis

In plain English

The Strait of Hormuz is a narrow waterway between Iran and Oman through which roughly 20% of the world's oil normally flows. Since the conflict began, Iran has been charging ships to transit, but doing so informally using Chinese yuan or Bitcoin. On 20 May, Iran's parliament took a step toward making these charges formal law, specifying that all fees must be paid in Iranian rials. The problem is that the Iranian rial is cut off from most international banking because of sanctions. You cannot easily pay in rials using a normal bank account if you are a shipping company in Japan or Singapore. So the law as written would effectively ban most commercial shipping from the strait unless Iran sets up a separate workaround. The same day, the price of Brent crude oil fell 5% because traders were betting that ongoing diplomatic talks meant the strait might reopen soon. But in practice, only 2 ships crossed the strait that whole day 97% below normal showing the market was pricing hope, not reality.

Deep Analysis

Root Causes

The rial-only bill emerges from a structural tension inside Iran's wartime governance: the IRGC-backed PGSA needs hard-currency inflows to sustain its operations, while the Majlis needs to demonstrate to the domestic audience that the war is extracting economic tribute from adversaries. These two requirements are operationally incompatible.

Iran's blocked access to SWIFT and US correspondent banking means the rial cannot function as an international settlement currency. The rial cannot be the settlement currency for international transactions because no international bank will hold rial receivables under current sanctions.

The bill's rial-only clause is therefore not an operational payment mechanism; it is a sovereignty signal a legislative assertion that Iran has the right to denominate trade in its own currency, regardless of whether the mechanism exists to implement it.

What could happen next?

Consequence
The rial-only clause directly invalidates the PGSA's yuan and Bitcoin payment channels that launched on 18 May (ID:3477), creating a governance split between Iran's legislative and operational arms that prevents any commercial shipper from achieving compliant transit.
Immediate · Assessed
Risk
Lloyd's Joint War Committee requires written rules of engagement before reopening Hormuz war-risk cover (ID:3481). The rial bill adds a second incompatibility: even if the coalition publishes rules, no insurer can underwrite under a regime requiring rial settlement that no counterparty can legally execute.
Short term · Assessed
Risk
China and India, which have bilateral passage arrangements using yuan and direct clearing, face a potential future demand to convert those arrangements into rial-denominated terms, which would be operationally impossible under current sanctions.
Medium term · Suggested
Meaning
The Brent-physical divergence on 20 May market down 5.16% while only 2 vessels transited shows the oil price is pricing a diplomatic probability, not operational reality. When the diplomatic track stalls again, the structural insurance premium identified by Goldman Sachs and Morgan Stanley will reassert sharply.
Immediate · Assessed

Source Landscape

This story draws on mixed-leaning sources from Iran and United States

Iran

United States

LeftRight

Primary parallel: Britain's 1967 sterling devaluation created an analogous legal-operational split in Aden's port system, where port charges were denominated in a currency that clearing partners could not settle, forcing a de facto dual system for two years until sterling was replaced by the rial at independence.

Iran's rial-only bill creates the same gap: a legislated currency requirement that its own trading partners cannot service, forcing informal channels to operate alongside the formal requirement.

Counter-parallel: The Ottoman Capitulations of 1838, which forced the empire to accept fixed low-tariff trade terms with European powers, showed the opposite dynamic: a foreign-currency-denominated trade structure imposed from outside. Iran's rial bill reverses the direction Tehran is imposing its own currency on transiting states but the structural lesson from 1838 to 1914 is that currency-denomination requirements without enforcement capacity produce evasion at scale, not compliance.

The 5.16% Brent fall on 20 May, from $111.22 to $105.54, repriced diplomatic optimism rather than any operational change. Windward recorded only 2 transits on 20 May against a pre-crisis baseline of 95 meaning the market compressed the risk premium by roughly $5.68 per barrel on the same day the physical waterway was at 97.9% blockade.

The IEA's $106 May projection met the market in one session. Goldman Sachs and Morgan Stanley previously identified a two-layer premium structure: a volatile kinetic component and a sticky structural insurance component .

The 20 May dip deflated the kinetic component on diplomatic signals; the structural insurance component which depends on Lloyd's JWC receiving published rules of engagement from either the coalition or PGSA remains unresolved. Any stalling in talks, or a kinetic event, will reassert the structural premium sharply.

Consensus view: RUSI's shipping and sanctions analysts note that the rial-only clause is architecturally designed to fail outward: Iran cannot integrate the rial into international clearing at scale because the currency remains under SWIFT and US correspondent-banking exclusions, so the clause functions as a de facto ban on all non-bilateral passage rather than a fee mechanism.

Counter-view: The National Iranian American Council's Jamal Abdi and Tehran-based economist Saeed Laylaz have both argued that the rial-only clause is a negotiating maximum it signals to Chinese and Indian operators that the current yuan/Bitcoin informal channels will eventually need formal legislative housing, giving Tehran leverage to demand those terms on paper while leaving informal practice intact through the transition.

Key tension: Whether the Majlis bill and the PGSA's yuan/Bitcoin portal reflect genuine institutional incoherence inside Tehran's command structure, or a deliberate two-track strategy where legislative maximalism is used to extract concessions while operational pragmatism keeps commercial transit alive.

First Reported In

Update #104 · Three days to Hengli

Mehr News Agency· 21 May 2026

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Causes and effects

Caused by

PGSA opens vessel portal, withholds tariff schedule

PGSA yuan/Bitcoin portal launched 18 May operates on currency rules incompatible with the Majlis rial-only bill

Occurred 20 May 2026

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Brent at $111, IEA at $106: the $5 gap

Brent-IEA spread widened on 19 May foreshadowed the 5.16% Brent fall on 20 May as diplomatic optimism repriced the risk premium

Occurred 19 May 2026

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Hormuz coalition: 8 days deployed, no rules published

Lloyd's JWC conditioned Hormuz war-risk cover on written ROE; the Majlis rial bill adds a second governance incompatibility blocking cover reopening

Occurred 20 May 2026

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This Event

Rial bill, yuan portal, two ships

Tehran's own legislature has voted to outlaw the yuan-and-Bitcoin payment channel that PGSA opened four days earlier, while the financial market and the physical waterway run on opposite information.

Led to

Five Gulf states reject Iran's sea route

The IMO letter rejects the rial-only Hormuz toll system enacted by the Majlis (ID:3495).

Occurred 21 May 2026

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Different Perspectives

Lloyd's Market Association

War-risk underwriters price the Houthis' Red Sea attacks because the group announces its targets in advance, but the unclaimed Damietta drone gives insurers a hit with no author to price against. An attack nobody claims costs shipping more than one that is claimed, since premiums are set against a known pattern, not raw damage.

US Central Command

CENTCOM has announced no strike on Iran since resuming bombing on 30 July within hours of an IRGC salvo on Jordan, and centcom.mil did not respond to requests to confirm any pause. The command has gone quiet before while a larger operation was being weighed, so silence alone proves nothing about what it has or has not done.

Hengaw

Hengaw recorded at least 67 executions in Iran during July, of which the state acknowledged only eight, and reported the 1 August execution of protest detainee Arvin Kheirkhahan at Shahrud with no advance notice to his family. A family's first notice of a death sentence is now usually the instruction to collect a body.

Egypt

Egypt's government asked media on 2 August to report the Damietta attack accurately, named no author, and said no findings will be published before its own investigation concludes. Cairo holds the debris and jurisdiction over an attack on its own soil, and naming a culprit now would pull it into a dispute it has avoided for five months.

Iran's Foreign Ministry

Araghchi called the Hormuz talks with Oman final-stage on 2 August, four days after his own deputy rejected Oman's lane proposal, and denied the Damietta drone strike as an Israeli false flag while two Iranian officials privately claimed it for Tehran. Iran's public position now contradicts itself on both files at once.

Bahrain and Kuwait

Bahraini and Kuwaiti aircraft flew their own strikes on Iranian depots in July with Emirati air cover behind them, and Ynetnews reports some Gulf capitals wanted the 2 August strike to proceed rather than stop. States that have already taken fire see a closing window on Iranian weakness, not a reason to pause.