What Happened
- Despite the US-Iran two-week ceasefire (April 7–8, 2026), Iran's IRGC maintained operational control of the Strait of Hormuz, with shipping traffic remaining more than 90% below normal levels.
- Shipping companies and oil traders sought legal and operational clarity before resuming normal transits; bulk carriers began tentatively transiting while oil tankers and LNG carriers awaited confirmation.
- Iran announced safe passage would be available "via coordination with Iran's Armed Forces" — effectively requiring vessels to seek IRGC permission, a significant departure from the strait's prior status as an internationally recognised transit passage route.
- Reports indicated Iran and Oman were expected to charge transit fees on vessels — an unprecedented development for the Strait.
- Hundreds of ships were reported waiting in the Gulf of Oman for the situation to normalise.
Static Topic Bridges
Freedom of Navigation and International Maritime Law
Freedom of navigation is a foundational principle of the international maritime order, enshrined in the UN Convention on the Law of the Sea (UNCLOS, 1982). Key provisions relevant to the Strait of Hormuz: - Article 38: Ships and aircraft have the right of "transit passage" through international straits used for international navigation. This right is non-suspendable, unlike innocent passage in territorial seas. - Article 44: States bordering straits must not hamper transit passage and must give notice of any danger to navigation.
- UNCLOS adopted: December 10, 1982 (Montego Bay, Jamaica); entered into force: November 16, 1994
- Transit passage (Article 38): continuous and expeditious transit; cannot be suspended
- Iran is NOT a party to UNCLOS (signed but not ratified)
- US is also NOT a party to UNCLOS (Senate never ratified)
- Oman and UAE (both bordering the strait on the southern side) are parties to UNCLOS
- The Strait of Hormuz is generally accepted as subject to transit passage rights regardless of Iran's non-ratification
Connection to this news: Iran's requirement for IRGC "coordination" before transit effectively transforms the legally non-suspendable transit passage right into a permission-based regime — a fundamental challenge to the international maritime order.
Choke Points in Global Trade and Energy Security
Maritime chokepoints are narrow straits or canals through which a disproportionate share of global trade passes. Major global chokepoints include: Strait of Hormuz (oil), Strait of Malacca (oil, manufactured goods), Suez Canal (container trade), Bab-el-Mandeb (oil, LNG), and Panama Canal (manufactured goods, grain).
- Strait of Hormuz: ~20 million b/d oil (~20% of global petroleum); ~19% global LNG
- Strait of Malacca: ~18–20 million b/d oil; critical for China, Japan, South Korea
- Bab-el-Mandeb (Red Sea): ~5–7 million b/d oil; Houthi attacks since late 2023 already disrupted Red Sea shipping
- Suez Canal: ~12–15% of global trade by volume
- Panama Canal: ~3–5% of global trade; affected by drought in 2023–24
Connection to this news: The Strait of Hormuz closure compounded the Red Sea disruption (Houthi attacks since 2023), creating a dual chokepoint crisis — with both the Persian Gulf exit and the Red Sea corridor severely constrained simultaneously, forcing shipping to take longer Cape routes.
Impact on Global Shipping and Freight Rates
The Hormuz closure and West Asia conflict dramatically raised global shipping costs. Oil tanker freight rates spiked sharply from late February 2026. Insurance premiums (war risk premiums) for vessels transiting the Gulf soared. The introduction of IRGC coordination requirements and potential transit fees adds a new layer of cost and uncertainty for global shippers.
- War risk insurance premium: can increase tanker voyage costs significantly when high-risk areas are declared
- Very Large Crude Carriers (VLCCs): primary vessels for Gulf oil exports; constrained by Hormuz
- Baltic Exchange: London-based maritime market; publishes key freight indices (Baltic Dry Index, Tanker Indices)
- 300–500 ships were reportedly waiting in Gulf of Oman for clearance
Connection to this news: The shipping industry's demand for "clarity" before resuming normal transits reflects the extraordinary commercial and legal uncertainty created by Iran's continued strategic management of the world's most critical energy chokepoint.
Key Facts & Data
- Shipping through Hormuz post-ceasefire: >90% below normal (April 2026)
- Ships waiting in Gulf of Oman: ~300–500
- UNCLOS adopted: December 10, 1982; in force: November 16, 1994
- UNCLOS Article 38: transit passage through international straits (non-suspendable)
- Iran: not a party to UNCLOS
- Strait of Hormuz oil flow: ~20 million barrels/day
- Strait of Malacca oil flow: ~18–20 million barrels/day
- IRGC requirement: vessel coordination before transit
- Transit fees: Iran and Oman reportedly planning to introduce