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Coverage · Iran–Gulf

Relationship record

The United States in the Gulf → Iran and the Gulf

A standing United States sanctions architecture on Iran, extended during the 2026 war to buyers of Iranian oil.

Sanctions and restrictions Since 1979

Active
Assessed as of
2026-09
Last reviewed
2026-10-04

AssessmentHigh confidence

A described arrangement, not a rating. Vigil publishes no measure of how strong, warm or hostile a relationship is, and no relationship on this site carries a score, a trend or a direction of travel. What is recorded is what the arrangement covers, when it began, what has changed it, and how firmly each of those is established.

The United States in the GulfImposes restrictions onIran and the GulfSubject to restrictions by
In short

The United States maintains a long-standing sanctions architecture on Iran, reinforced from February 2025 under a declared maximum-pressure policy and extended during the 2026 war to third-country refiners purchasing Iranian crude.

Iran and the Gulf subject to restrictions by The United States in the Gulf. A directional arrangement: the two parties do not hold the same position in it. Authored once and read from both ends.

The arrangement

Status
ActiveIn force and operating. Says nothing about how well it is working, or about which way it is heading.Last material change: 2025-02.
What it covers
FinanceTradeEnergyLegal and treatyCategories the arrangement is documented to include. Not a measure: a relationship covering more of them is described in more detail, not held more firmly.

Summary

United States restrictions on Iran predate the current phase by decades and are the most extensive of any state's. In February 2025 the administration directed a renewed maximum-pressure policy of sanctions and diplomacy, and through the 2026 war the architecture has been extended to third parties, including designations of Chinese refiners purchasing Iranian crude. This record carries the standing restrictive relationship. Individual designations are events, the naval measures applied to Iranian exports during the war are military action rather than sanctions, and the economic consequences belong to the module's exposure analysis — three separate things that this module deliberately does not model as one.

Why it matters

The sanctions architecture sets the terms on which Iran can sell the commodity the whole region trades, and its practical ceiling is the willingness of buyers outside the measures to keep buying. That is why the Iranian export dependency on China is authored as its own relationship rather than as a line in this one.

Related events

Systems it depends on

LogisticsIranian crude export system

Canonical logistics records. They carry the corridors, nodes, dependence and disruption history that this relationship rests on and does not restate.

What remains unknown

  • The instruments are numerous, layered and repeatedly amended; this record describes the standing relationship rather than enumerating measures. The designation record belongs to the Timeline.
  • The naval interdiction of Iranian exports reported from April 2026 is a military measure and is not authored here as a sanctions instrument.
  • The Treasury's designations of 1 October 2026, against Iranian automotive, rail, manufacturing and metals companies, are new designations under existing authorities. They are not an amending instrument, and the standing relationship is unchanged.

Watch questions this relationship bears on

Standing analytical questions whose evidence runs through this relationship, each with its latest review. Derived from the Watch object, never restated here.

All Iran–Gulf relationships Open in Explore

Sensitivity: public-contextual Confidence: High Sources: Congressional Research Service — Iran, the Gulf and the Strait of Hormuz · US / EU / UK sanctions designations · Established historical record · Established international media reporting Methodology Corrections

Assessed as of — 2026-09 Last reviewed — 2026-10-04