Iran’s Threat to Close the Strait of Hormuz: Context and Significance

In 2024, the Islamic Republic of Iran declared its intent to completely close the Strait of Hormuz, a narrow maritime chokepoint between the Persian Gulf and the Gulf of Oman. The Strait, only 39 km wide at its narrowest point (CIA World Factbook, 2023), is a critical artery for global energy flows. Approximately 21 million barrels per day (bpd) of crude oil, representing nearly 21% of global petroleum liquids consumption, transit this route (U.S. Energy Information Administration, 2023). Iran’s unilateral threat underscores its strategic leverage over this vital passage, raising concerns about disruptions to international energy markets and maritime navigation governed by international law.

Legal Framework Governing the Strait of Hormuz

The Strait of Hormuz falls under the purview of the United Nations Convention on the Law of the Sea (UNCLOS) 1982, specifically Part III (Territorial Sea and Contiguous Zone) and Part V (Exclusive Economic Zone). Article 38 of UNCLOS mandates the right of transit passage through straits used for international navigation, prohibiting coastal states from impeding passage of ships and aircraft.

• The International Maritime Organization (IMO) regulates navigation safety and enforces standards for straits used for international navigation.
• UN Security Council Resolutions have periodically addressed maritime security in the Persian Gulf, emphasizing freedom of navigation and conflict de-escalation.
• India’s Article 253 empowers Parliament to implement international treaties, including those related to maritime security, reflecting India’s legal basis to engage in protecting navigation rights.

However, UNCLOS lacks explicit enforcement mechanisms to prevent unilateral closures by littoral states, creating a legal gap exploited by Iran’s threat.

Economic Stakes: Global and Indian Energy Security

The Strait of Hormuz is a linchpin in global energy supply chains. According to the U.S. Energy Information Administration (2023), 21 million bpd of crude oil pass through this chokepoint, accounting for 21% of global petroleum liquids consumption. The Persian Gulf region also supplies nearly 30% of global LNG exports (International Gas Union, 2023).

• India imports approximately 80% of its crude oil via this route, with annual oil imports valued over USD 120 billion (Ministry of Petroleum and Natural Gas, India, 2023).
• Closure of the Strait could spike global crude oil prices by 30-50% within weeks, aggravating inflationary pressures and widening trade deficits worldwide (World Bank Commodity Markets Outlook, 2022).
• Price volatility historically increased by 45% during previous closures or threats, impacting energy-importing economies disproportionately.

Geopolitical and Security Dimensions

Iran’s control over the Strait is reinforced by its naval capabilities, particularly the Islamic Revolutionary Guard Corps Navy (IRGCN), which conducts frequent naval exercises in the area (IISS Military Balance, 2023). This unilateral dominance contrasts with other global chokepoints like the Strait of Malacca, where multiple littoral states and multilateral security frameworks reduce risks.

• The United Nations Security Council (UNSC) remains a key forum for addressing maritime security tensions but has limited capacity to enforce freedom of navigation in contested straits.
• The International Atomic Energy Agency (IAEA) monitors Iran’s nuclear activities, which exacerbate geopolitical tensions influencing Iran’s maritime posture.
• The Indian Navy actively patrols the Indian Ocean Region to safeguard sea lines of communication, including the Strait of Hormuz, underscoring India’s strategic interest.

Comparative Analysis: Strait of Hormuz vs. Strait of Malacca

Critical Legal and Policy Gaps

UNCLOS provides for transit passage but does not contain robust enforcement provisions against unilateral closures by coastal states. This gap allows Iran to leverage its geographic control in a coercive manner without immediate legal repercussion. The International Maritime Organization focuses on navigation safety but lacks enforcement powers to counter geopolitical blockades.

• UN Security Council resolutions depend on political consensus, often hindered by veto powers and geopolitical alignments.
• India’s constitutional mandate (Article 253) enables treaty implementation but India lacks a dedicated multilateral framework to enforce freedom of navigation in the Persian Gulf.
• There is no permanent international naval coalition specifically tasked with securing the Strait of Hormuz akin to multinational patrols in the Strait of Malacca.

Way Forward: Strategic and Policy Imperatives

• Strengthen multilateral maritime security frameworks involving littoral states, global powers, and energy-importing countries to deter unilateral closures.
• Enhance India’s naval presence and diplomatic engagement in the Persian Gulf to safeguard its energy lifeline.
• Push for UNCLOS reforms or supplementary protocols that include enforcement mechanisms against coercive blockades of international straits.
• Leverage international forums like the IMO and UNSC to build consensus on maritime security and freedom of navigation.
• Promote diversification of energy import routes and sources to reduce vulnerability to chokepoint disruptions.