The Strait of Hormuz: A Legal Tightrope Amidst Rising Tensions
The Strait of Hormuz, a narrow waterway bordering Iran and Oman, remains a critical chokepoint for global energy supplies. Approximately 20 percent of the world’s crude oil and a significant volume of liquefied natural gas transit this vital passage daily. Recent escalations in tensions between Iran, Israel, and the United States have reignited a crucial legal question: can Iran lawfully close the Strait of Hormuz?
International Law and the Right of Transit Passage
The answer, according to international law, is complex. The 1982 United Nations Convention on the Law of the Sea (UNCLOS) classifies the Strait of Hormuz as a strait used for international navigation. Articles 38 and 44 of UNCLOS establish the principle of transit passage, granting all ships and aircraft – including military vessels – the right to continuous and expeditious passage without requiring prior authorization from coastal states.
This right of transit passage is not subject to suspension, even during times of conflict or heightened tension. This principle extends to other strategically important straits, such as the Strait of Malacca and the Strait of Singapore. Coastal states like Malaysia and Indonesia (Strait of Malacca) and Malaysia, Indonesia, and Singapore (Strait of Singapore) do not have the unilateral authority to close these waterways to international navigation.
Iran’s Recent Actions and Statements
Despite international law, Iran has repeatedly threatened to close the Strait of Hormuz in response to perceived threats or sanctions. On March 12, 2026, Iran’s new supreme leader, Mojtaba Khamenei, stated that the closure of the Strait should continue as a “tool to pressure the enemy,” and called for the closure of U.S. Military bases in the Middle East. This follows joint military strikes by the United States and Israel on Iran on February 28, 2026, which resulted in the death of Iran’s former supreme leader, Ali Khamenei, and subsequent Iranian retaliatory attacks.
These actions have already had a significant economic impact, contributing to a global surge in oil and gas prices. More than 1,000 cargo ships, primarily oil and gas tankers, have been blocked from transiting the strait. Reports indicate Iran has damaged at least 11 merchant ships, with six abandoned, and at least 10 seafarers have been killed or are missing. One port worker was killed and two wounded in Bahrain.
The Reality of Enforcement and Potential Conflicts
While international law is clear, enforcing it in the face of a determined Iran presents significant challenges. The United States has previously indicated its willingness to ensure freedom of navigation through the Strait, but proposed naval escorts have not materialized despite continued Iranian strikes and reports of mining the waterway.
The Strait of Hormuz is at its narrowest just 21 nautical miles wide, constrained by the Iranian coast on one side and the Musandam peninsula in Oman on the other. This narrowness makes it particularly vulnerable to disruption. The potential for miscalculation or escalation remains high, with the risk of a broader conflict in the region.
Future Trends and Geopolitical Implications
The situation in the Strait of Hormuz highlights a growing trend of states challenging international norms and leveraging strategic chokepoints for political gain. The ongoing crisis underscores the vulnerability of global supply chains and the interconnectedness of energy markets.
Several potential future trends could further complicate the situation:
- Increased Iranian Military Capabilities: Continued investment in asymmetric warfare capabilities, including naval mines and anti-ship missiles, could enhance Iran’s ability to disrupt shipping.
- Great Power Competition: Increased competition between the United States, China, and Russia for influence in the Middle East could lead to further instability.
- Cyber Warfare: Cyberattacks targeting critical infrastructure related to oil and gas production and transportation could exacerbate disruptions.
FAQ
Q: Can Iran legally close the Strait of Hormuz?
A: No. International law, specifically UNCLOS, guarantees the right of transit passage through the Strait, which Iran cannot legally suspend.
Q: What is the impact of the closure on oil prices?
A: The disruption of oil shipments through the Strait has already caused a significant surge in global oil and gas prices, and further closure could lead to even higher prices.
Q: What is the United States doing to address the situation?
A: The United States has stated its commitment to ensuring freedom of navigation, but proposed naval escorts have not been fully implemented.
Did you know? The Strait of Hormuz has been a focal point of geopolitical tension for decades, including during the Iran-Iraq “tanker war” in the 1980s.
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