Iran's recently-founded Persian Gulf Strait Authority shared an updated list of 77 vessels on Monday that it said violated Iranian protocols for the Strait of Hormuz and would face restrictions on future passages, including fines, detention, or confiscation.
Traffic through the strait has been just a fraction of the more than 100 vessels that transited prior to the start of the US-Iran war on Feb. 28.
The PGSA also warned insurers, protection and indemnity service providers among others against dealing with the non-compliant vessels to avoid consequences. The self-appointed authority is itself subject to sanctions adopted by the US.
"Insurers, P&I clubs, and classification societies are warned that, to protect against the consequences arising from dealings with these vessels, they should refrain from providing services to them," the authority said in a social media post on X.
The Iranian government authority was founded in May this year to regulate and oversee vessel traffic through the Strait of Hormuz.
In late May, the US Treasury Department imposed sanctions on it, alleging that it extorted commercial vessels in the Strait of Hormuz to fund the Islamic Revolutionary Guard Corps.
The sanctions which target the PGSA and any person or entity cooperating with the authority form part of the Trump administration's broader "Economic Fury" campaign aimed at raising economic pressure on Iran and curbing its oil revenues.