Iran proposed requiring prior authorization for all vessels crossing the Strait of Hormuz and imposing fees on ships from hostile nations on April 18, 2026 [1].
This move targets a critical global maritime chokepoint, potentially disrupting international trade and escalating military tensions between Iran, Israel, and the U.S.
The proposal includes specific restrictions for ships linked to Israel. A spokesperson for the Revolutionary Guard, cited by Tasnim, said, "From now on, all vessels must request prior authorization to cross the Strait of Hormuz" [1].
These measures contrast with previous diplomatic assurances. On April 17, 2026, Iranian Foreign Minister Abbas Araghchi said the Strait of Hormuz remained completely open for the duration of a ceasefire [2]. However, reports indicate that Iran returned to imposing navigation restrictions on April 18 [1].
The U.S. has reacted sharply to the shift in policy. Donald Trump said, "Iran is blackmailing us by closing the Strait" [3].
Iranian authorities aim to strengthen control over the strategic route and increase geopolitical influence in the region [1, 3]. By leveraging its geography, Tehran can exert direct pressure on countries it considers adversaries, specifically targeting the flow of goods and energy to Israel [1].
The Strait of Hormuz serves as the primary artery between the Persian Gulf and the Arabian Sea. Any restriction on this passage affects global oil prices and shipping insurance costs due to the high volume of tankers passing through the narrow waterway [2].
“"From now on, all vessels must request prior authorization to cross the Strait of Hormuz."”
The proposal signals a shift from diplomatic ceasefire rhetoric to active maritime leverage. By transitioning from a policy of 'open waters' to a permit-based system, Iran transforms a legal international transit corridor into a political tool, allowing it to selectively throttle trade and increase the cost of operations for its geopolitical rivals.
