Hormuz Becomes Test of Freedom of Navigation in US-Iran War
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- Trump proposed a 20% fee on cargo vessels transiting the Strait of Hormuz under US protection on July 13, then walked the proposal back within a day — a position at odds with the freedom of navigation principle the US is trying to defend.
- Iran is seeking to permanently alter the Strait of Hormuz's navigation regime through a proposed Persian Gulf Strait Authority, new shipping routes, and tolls for safe passage, continuing attacks on commercial shipping despite the June MOU.
- Iran attacked three commercial ships on July 6-7, including a Qatari LNG tanker near the Omani coast allegedly using an alternative route to bypass Iran's authorized passage, showing economic incentives have not curbed Tehran's use of Hormuz as leverage.
- The June 17 MOU (Point 5) committed Iran to use "best efforts for safe passage of commercial vessels with no charge for 60 days" but left "future administration and maritime services" ambiguous — and tolls are not consistent with international maritime law.
- US strategy has cycled from naval blockade of Iranian ports to economic incentives to military strikes, with none restoring safe passage; the April 8 ceasefire required Iran to reopen the strait, which never happened yet the US maintained the ceasefire anyway.
- UNCLOS 1982 protects transit passage through "straits used for international navigation" — a principle now under simultaneous pressure from Houthi Red Sea attacks and China's South China Sea actions, meaning the Hormuz outcome sets precedent for other contested waterways.
- Allies have been unwilling to send naval assets to help protect Hormuz navigation, unlike during the 1980s Tanker War when international partners contributed forces, leaving the US defending a principle it cannot enforce alone.
Why it matters: Roughly 80% of global trade by volume moves by sea, and the US's inability to rebuild international support for Hormuz navigation — unlike during the 1980s Tanker War — means the conflict's outcome will set the precedent for every other contested waterway, from the Red Sea to the South China Sea. Asian economies dependent on Hormuz transit now face an open-ended contest over the rules of passage, not just energy prices.
