Iran plans to declare a restricted zone outside the Strait of Hormuz and sanction any vessel that enters without authorization, tightening its grip on a route that carries roughly 20% of the world's oil and liquefied natural gas. The move follows Iran rejecting alternative shipping corridors proposed by Oman and the International Maritime Organization, and comes as the US denies Iran's claim that it struck an unmanned American vessel in the strait. Oil prices have risen as shipping traffic through the waterway falls below pre-conflict levels.
Iran is moving to formalize its grip on the Strait of Hormuz, one of the world's most consequential oil chokepoints. The country plans to declare a restricted zone outside the strait and impose sanctions on any vessel that enters without authorization. The strait is a passage through which roughly 20% of the world's oil and liquefied natural gas travels.
Iran expands its enforcement zone
Tehran has established a new body, the Persian Gulf Strait Authority, working alongside the Islamic Revolutionary Guard Corps Navy to enforce stricter transit rules. The supervisory zone has expanded to cover an area described as ten times wider than before, stretching from Kuh-e Mobarak in Iran to southern Fujairah in the UAE. Only routes Iranian authorities designate are now permitted, and ships must maintain active contact with Iranian naval forces while in transit. Iran has already issued turn-back orders and reported incidents involving tankers that used unapproved routes in June 2026.
Both Oman and the International Maritime Organization proposed alternative shipping corridors to ease the pressure on commercial traffic, but Iran rejected them. Talks with Oman have still produced agreements for temporary shipping corridors under joint management, though full access depends on broader concessions, including US acceptance of Iran's oversight terms.
US denies vessel strike amid fragile ceasefire
Separately, the United States denied Iran's claim that it struck an unmanned American vessel in the strait, calling the assertion, according to Crypto Briefing: "total lie". The denial follows a fragile ceasefire between the US and Iran after hostilities between the United States and Israel began on February 28, 2026.
Oil markets absorb the impact
Shipping traffic through the strait has fallen below pre-conflict levels, and oil prices have risen in response to the tightening of access.
Insurance premiums for vessels transiting the region have climbed as underwriters price in the elevated risk of enforcement incidents. LNG shipments from Qatar also cross the strait, and European buyers who pivoted to Qatari LNG after Russian supply disruptions are now exposed to a second chokepoint risk.
Sources: Crypto Briefing, Crypto Briefing
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