Iran threatens fines, detention for ships violating Hormuz transit rules

Iran's Persian Gulf Strait Authority has threatened vessels that violate its transit rules in the Strait of Hormuz with fines, detention, or confiscation, escalating Tehran's efforts to assert control over one of the world's most critical maritime chokepoints as a new round of U.S. sanctions looms.

New Compliance Demands

The PGSA, a body Iran established to manage traffic through the strait, posted the warning on X on Sunday, advising cargo owners shipping to or from the Persian Gulf to consult an updated list of vessels it deems non-compliant before chartering ships. Any vessel engaging in ship-to-ship transfers or transshipment with a listed ship will itself be added to the restricted list, the authority said. Ship operators seeking removal must submit a formal request with supporting explanations to Iranian maritime authorities.reuters+4

The warning heightens risks for charterers and shipowners whose vessels transit the strait, a waterway through which a large share of global oil and gas shipments pass.devdiscourse

Broader Tensions

The announcement comes as the United States prepares to unleash what Treasury Secretary Scott Bessent called "the single greatest financial offensive ever marshalled against an adversary" in an opinion piece published Sunday in the Financial Times. Bessent is scheduled to hold a press conference on Monday to detail further measures targeting Iran's banking, energy, aviation, and cryptocurrency sectors.investing+1

Both countries let a 60-day ceasefire window lapse without reaching a broader agreement, ending the formal truce mechanism meant to wind down the conflict that began in February. Iran recently threatened to shift to a "fully offensive" military posture as diplomacy stalled.Reuters+1

Strait of Hormuz at Center Stage

Iran's parliament has also moved to formalize fees for navigation, environmental services, and safety provisions in the strait, according to the semi-official Fars news agency. The PGSA had previously warned in June that vessels passing outside its designated routes would not be guaranteed safe passage.siasat+1

The Strait of Hormuz, which separates Iran from Oman and connects the Persian Gulf to the Gulf of Oman, has been a focal point of the U.S.-Iran confrontation. Bessent warned that "any nation that serves as a financial artery of a withering regime should expect to share in its isolation".investing