In August 2026, Iran and Oman finalized the framework of a bilateral maritime accord that will reshape navigation through the Strait of Hormuz, the narrow waterway that carries roughly one-quarter of the world's seaborne oil trade. The agreement, now in its final drafting phase, establishes new transit corridors that place incoming tankers under Iranian territorial waters and outbound vessels along a route coordinated with Oman—a shift with profound implications for energy security, global shipping costs, and geopolitical leverage in the Persian Gulf.
Why This Matters
• Shipping routes redefined: Vessels entering the Gulf will transit Iranian waters; those departing will follow an Omani-managed corridor, reversing six decades of internationally administered passage.
• Toll-free period ending: After a 60-day transitional window, Iran is expected to impose mandatory transit fees on all commercial and energy tankers.
• Escalating U.S.-Iran standoff: President Donald Trump stated in a televised interview that the United States would bomb Oman "without mercy" if the sultanate obstructs American objectives in the strait, injecting volatility into an already fragile diplomatic landscape.
A New Model for a Critical Chokepoint
Esmail Baghaei, spokesman for Iran's Ministry of Foreign Affairs, confirmed that the two nations have reached consensus on the "map of the transit route" and are now finalizing a joint declaration. While neither government has disclosed the full text, leaked details indicate that the arrangement divides navigational responsibility between the two littoral states, with inbound ships routed through waters under Tehran's jurisdiction and outbound traffic managed in coordination with Muscat.
The accord represents what Iranian officials describe as a "new management model" for the strait, which for the past 60 years has functioned under the framework of international maritime law—specifically, the United Nations Convention on the Law of the Sea (UNCLOS). That convention guarantees the right of transit passage through straits used for international navigation, a principle that neither charges fees nor subjects vessels to inspections absent a security threat.
Yet neither Iran nor the United States has ratified UNCLOS, creating a legal gray zone that both capitals have exploited. Tehran argues that as a coastal state it has sovereign authority to regulate traffic in its territorial waters, while Washington insists on unfettered passage as a matter of customary international law and strategic necessity.
Impact on Global Energy Markets
The Strait of Hormuz is among the world's most strategically sensitive maritime passages. Approximately 25% of global seaborne crude oil and 20% of liquefied natural gas (LNG) trade pass through the 33-kilometer-wide channel separating Iran from the Arabian Peninsula. The economies of China, India, Japan, and South Korea depend heavily on this artery, and any disruption—or increase in transit costs—reverberates through global energy prices and supply chains.
Under the new arrangement, a 30-day mine-clearance operation is planned for the central lane of the strait, which will then serve as a permanent two-way corridor. During the initial 60-day ceasefire period, no tolls or taxes will be levied. After that window closes, however, Iran intends to introduce a "service fee" to cover cargo security, personnel protection, and marine environmental safeguards, with the possibility of escalating to full-fledged transit tariffs, according to officials' statements.
Maritime insurers, oil traders, and naval strategists are watching closely. Any unilateral imposition of fees by Iran—or by the United States, which has maintained a naval blockade and sanctions regime—would test the limits of international maritime law and could trigger legal challenges, increased premiums, or rerouting of shipments around the Cape of Good Hope, adding weeks and substantial costs to voyages.
Oman's Delicate Balancing Act
Oman has long cultivated a reputation as the Gulf Cooperation Council's most neutral member, eschewing the sectarian and ideological rivalries that define much of the region. The sultanate played a pivotal behind-the-scenes role in brokering secret U.S.-Iran talks that led to the 2015 nuclear agreement, and it facilitated the Saudi-Iranian rapprochement in 2023.
This time, however, Muscat's diplomacy has drawn the ire of Washington. President Trump warned that the United States would bomb Oman if it "gets in the way" of American policy objectives in the strait—a stark departure from the traditionally close defense partnership between the two countries.
Despite suffering Iranian drone strikes in March 2026, Oman has pressed ahead with its mediation efforts. The sultanate expressed "deep regret" over the U.S.-Israeli military campaign against Iran launched in February 2026, describing it as a violation of international law, while simultaneously condemning Iranian attacks on GCC states as "unacceptable." Oman's foreign ministry has called for "transparent and neutral cooperation" with all parties to restore freedom of navigation in full compliance with the Law of the Sea.
Tehran had initially proposed a 50-50 joint supervision arrangement with Oman, but that offer was rejected. Instead, the current accord grants Muscat control over a narrower segment of the exit route, while Iran retains authority over the larger share of the navigable corridor.
What This Means for European Businesses and Supply Chains
For companies across Europe with business interests in the Gulf—whether in energy, logistics, shipping insurance, or manufacturing supply chains—the accord introduces a new layer of unpredictability. Italian energy importers, including major operators such as those relying on Gulf crude oil, as well as Mediterranean refineries and logistics hubs, may face particular pressure given the region's critical role in European energy security.
Companies operating in these sectors may experience:
• Higher shipping insurance premiums as underwriters reassess risk in a contested waterway.
• Potential delays or inspections if Iran exercises its claimed authority to screen vessels in its territorial waters.
• Increased freight costs once transit fees are implemented, which could be passed through to consumers in the form of higher fuel prices and increased operating costs for energy-dependent industries.
• Supply chain disruptions if geopolitical tensions escalate into another round of blockades, drone strikes, or naval confrontations.
European energy importers and freight forwarders should monitor developments closely and consider contingency planning, including alternative sourcing routes or hedging strategies to mitigate price volatility.
Legal and Diplomatic Uncertainties
International law experts caution that the Iran-Oman accord, while pragmatic from a bilateral standpoint, sits uncomfortably with the established doctrine of transit passage. Under UNCLOS, coastal states may not suspend, obstruct, or charge tolls for transit through international straits in peacetime. The imposition of fees or selective access—Tehran has already granted preferential passage to vessels from China, Russia, India, Iraq, Pakistan, Malaysia, Thailand, and the Philippines—could be challenged as inconsistent with customary international law.
Yet enforcement mechanisms are weak. The International Tribunal for the Law of the Sea has limited jurisdiction over non-parties, and in a region where military force often substitutes for legal process, the accord's durability will depend less on its conformity with UNCLOS and more on the willingness of major powers to accept or contest it.
The United States has not issued an official response, a silence that reflects both the complexity of the situation and the constraints on Washington's ability to project power in the Gulf without triggering a broader conflict. The breakdown of nuclear negotiations—originally set for a 60-day window—has left both sides preparing for escalation rather than compromise. Iran has ramped up production of missiles and drones, while the U.S. Navy maintains a blockade posture that Tehran describes as illegal.
A Fragile Framework
The Iran-Oman agreement is best understood as a temporary truce rather than a durable solution. Iranian officials have made clear that full security and normal commercial traffic cannot resume until U.S. sanctions, military threats, and naval blockades are lifted, along with compensation for what Tehran calls violations of American commitments. Oman, meanwhile, is seeking to minimize disruptions in the short term while keeping channels open for a longer-term diplomatic resolution.
For now, the accord provides a narrow path through one of the world's most dangerous flashpoints. But with Trump threatening military action, Iran tightening its grip on the waterway, and Oman caught in the middle, the risk of miscalculation—or deliberate provocation—remains high. Global markets, regional governments, and European businesses with exposure to Gulf energy flows would be wise to prepare for further turbulence in the months ahead.
