Iran has expanded a roster of vessels it regards as non-compliant and liable to enforcement if they attempt to transit the Strait of Hormuz, according to a government website and a report published by MarineLink Maritime News on 2 September 2026.
The government statement made clear that ships designated on the list may face a range of punitive measures should they attempt passage through the waterway; the announcement cited fines, confiscation or detention as possible outcomes.
- Fines.
- Confiscation.
- Detention.
MarineLink reported that the notice followed an earlier Tehran announcement on 24 August 2026 in which Iran said it had blacklisted 45 tankers. The more recent posting expands that earlier action but did not, in the material reviewed for this report, publish a complete roster of newly added names or flag states.
The government website was the vehicle for the most recent publication, and MarineLink Maritime News carried the item on 2 September 2026. The press account and the government posting together form the factual basis for the blacklist expansion set out here.
Details of the listings
Tehran’s 24 August statement identified 45 tankers as blacklisted; the subsequent update published on the government site indicates additional vessels have been added to that catalogue of non-compliant ships. The available material specifies the penalties to which such vessels would be liable in the event of an attempted transit but offers limited public detail about criteria used to determine non-compliance.
Enforcement notice
The government posting identifies fines, confiscation and detention as enforcement measures that may be applied to vessels the authority considers non-compliant when they seek to sail through the Strait of Hormuz. MarineLink’s 2 September 2026 report relayed that information without listing named companies or individual ships in the newly expanded notice.
The sequence of public statements, the 24 August declaration of 45 blacklisted tankers followed by the government website’s later update and MarineLink’s reporting on 2 September 2026, constitutes the recorded basis for the development described here. Beyond the penalties explicitly listed, the material available does not set out further legal or operational procedures in detail.
Operators, owners and insurers will need to consult the government posting and their own advisers for direct guidance; the public reporting establishes the existence of an expanded blacklist and the specific classes of enforcement that Iran has signalled but does not provide a comprehensive list of affected vessels or practical directives for third parties.