What Happened
- The United States announced a naval blockade of the Strait of Hormuz as part of its military operations against Iran following US-Israeli air strikes in late February 2026 that killed Iran's Supreme Leader Ali Khamenei.
- Iran had largely blocked shipping through the Strait since February 28, 2026, and imposed a $2 million transit toll on passing vessels — a move widely condemned as violating international law.
- In April 2026, Trump formalised a US naval blockade, declaring that the US Navy would intercept any ship paying tolls to Iran.
- Roughly 20% of the world's oil and natural gas transits the Strait of Hormuz — its closure triggered a 10-13% jump in Brent crude prices with warnings of $100/barrel-plus scenarios.
- Lebanese and Israeli envoys meeting in Washington under US mediation underscored the interlinked nature of the Iran-Hezbollah-Lebanon conflict theatre with the broader Hormuz crisis.
- Legal analysts debated whether Iran's closure was defensible under UNCLOS — particularly the right of transit passage versus innocent passage.
Static Topic Bridges
UNCLOS and the Right of Transit Passage
The United Nations Convention on the Law of the Sea (UNCLOS), adopted in 1982 and entered into force in 1994, is often described as the "constitution of the oceans." It establishes a comprehensive legal framework for all uses of the sea. For international straits — passages used for international navigation connecting two parts of the high seas or EEZs — UNCLOS Part III (Articles 34-45) establishes the right of transit passage. Unlike innocent passage (which coastal states can suspend), transit passage is un-suspendable and applies to all ships and aircraft in continuous and expeditious transit.
- Innocent Passage (Article 17-26): Right to pass through territorial sea without harming peace, good order, or security; can be suspended by coastal state in specified areas.
- Transit Passage (Article 37-44): Applies to international straits; cannot be suspended even in times of armed conflict; applies to submarines and aircraft (unlike innocent passage).
- The Strait of Hormuz qualifies as a "strait used for international navigation" under Article 37.
- Neither the US nor Iran has ratified UNCLOS — but the transit passage regime is considered customary international law binding on all states.
- Iran's $2 million per-vessel transit fee violates Article 26 (charges on account of passage alone are prohibited) and the non-discrimination principle.
Connection to this news: Iran's attempt to impose tolls and restrict passage through the Strait, and the US counter-blockade, both raise foundational questions of UNCLOS applicability — particularly whether transit passage rights can be overridden in wartime, which most legal scholars say they cannot.
Strategic Importance of the Strait of Hormuz
The Strait of Hormuz, approximately 55 km wide at its narrowest point, lies between Iran to the north and the UAE and Oman to the south. It connects the Persian Gulf to the Gulf of Oman and the Arabian Sea. The strait is the world's most critical maritime chokepoint: approximately 21 million barrels of crude oil pass through it daily, representing ~20-21% of global oil consumption. Tankers typically use the Omani waters for inbound passage and Iranian territorial waters for outbound passage — a traffic separation scheme established under IMO.
- Key oil-exporting countries whose exports flow through the Strait: Saudi Arabia, UAE, Kuwait, Iraq, Qatar, Iran.
- Qatar exports ~90% of its LNG through the Strait of Hormuz — making LNG markets especially vulnerable.
- The only partial alternative is Saudi Arabia's East-West Pipeline (Petroline) to Yanbu on the Red Sea: capacity ~5 million bpd, far below total Strait traffic.
- UAE has the Abu Dhabi Crude Oil Pipeline (ADCOP) with a capacity of 1.5 million bpd, bypassing the Strait via Fujairah port.
- India imports ~4.5 million bpd of crude, with a significant share from GCC countries routed through the Strait.
Connection to this news: The US blockade and Iran's disruption of the Strait directly threatens India's energy security, as India is heavily dependent on Hormuz-routed crude imports from the GCC, making this a critical vulnerability in India's current account.
Freedom of Navigation and India's Position
India has consistently upheld freedom of navigation and overflight as a cornerstone of its maritime doctrine, particularly in the Indo-Pacific. India's UNCLOS ratification (1995) and maritime policy have emphasised SAGAR (Security and Growth for All in the Region) framework — a term coined by PM Modi in 2015. India has participated in US-led Combined Maritime Forces exercises but has avoided direct military confrontation in the Hormuz theatre, opting for diplomatic engagement.
- SAGAR doctrine: collective regional maritime security, freedom of navigation, and rules-based order in the Indian Ocean.
- Indian Navy's maritime theatre commands (including Information Fusion Centre - IFC-IOR at Gurugram) monitor threats to maritime trade routes.
- India's Exclusive Economic Zone (EEZ): 2.02 million sq km; Extended Continental Shelf claim: additional 1.5 million sq km.
- India opposed China's "nine-dash line" claims as inconsistent with UNCLOS in the South China Sea — the same legal principle applies to Iran's Strait restrictions.
Connection to this news: India's energy import dependence through the Strait of Hormuz gives it a direct stake in the legal and operational resolution of the blockade, making this simultaneously a foreign policy and economic security issue.
Key Facts & Data
- Strait of Hormuz width at narrowest: ~55 km (navigable channel: ~3.2 km wide)
- Daily oil transit: ~21 million barrels (~20% of global consumption)
- LNG transit: Qatar's ~90% of LNG exports pass through
- Brent crude price jump on disruption: 10-13% in early trading
- Iran's transit toll: $2 million per vessel (declared illegal under UNCLOS)
- Neither US nor Iran has ratified UNCLOS (but transit passage = customary international law)
- US naval blockade declared in April 2026 as counter to Iran's closure
- Alternative bypass capacity: Saudi Petroline (~5 mn bpd) + UAE ADCOP (~1.5 mn bpd)