Iran has consolidated its de facto control over the Strait of Hormuz by establishing military checkpoints, instituting vessel inspections, special diplomatic protocols, and, in some cases, "security fees" to ensure safe passage, Reuters reported, citing 20 sources, including representatives of Asian and European shipping companies, as well as Iranian and Iraqi officials.

According to the report, the Islamic Revolutionary Guard Corps (IRGC) plays a central role in a new tiered transit system that prioritizes vessels with ties to allies China and Russia. Other vessels, not enjoying special status, may require intergovernmental agreements or direct payments for passage. Those familiar with the matter said the United States and its allies do not enjoy such privileges.

"US-flagged vessels are almost nonexistent because the Iranians won't let them through. Shipowners don't even think about sending them." "One shipping industry source told Reuters.

Ships linked to Israel are also not allowed to pass through the strait.

According to two European shipping sources, some vessels not covered by intergovernmental agreements pay Iranian authorities over $150,000 to ensure safe passage through the Strait of Hormuz. Vessels are also charged security and navigation fees, which vary depending on the type of cargo. Two senior Iranian officials confirmed this information, adding that "these fees do not apply to all countries."

To avoid US sanctions, the Iranians require either cash or wire transfers through shell companies. Sources reported that the logistics of the process are leading to lengthy delays, with some captains waiting 15 to 30 days at sea to confirm clearance and safe passage.