Europe's Demands and the Hidden Friction in the US-Iran Peace Deal

Second, and more crucially, the E4 statement emphasized that the "urgent reopening" of the Strait of Hormuz with "unconditional and unrestricted freedom of navigation is essential" . The leaders committed to playing their part in achieving this, "in accordance with international law" .

This position builds on months of escalating concern. In March 2026, the same four nations—alongside the Netherlands and Japan—issued a joint statement condemning Iranian attacks on unarmed commercial vessels and the "de facto closure" of the strait . They called for an immediate halt to threats, mining, and drone and missile strikes targeting shipping . By May, a broader coalition of 22 countries, including the E4, had affirmed a commitment to using diplomatic, economic, and military capabilities to restore freedom of navigation .

The Immediate Friction Point

The E4's demand for unconditional access creates an explicit tension with the MOU. According to the terms reported by Iran's state-affiliated Mehr News Agency, the document states that the Strait of Hormuz will reopen "under the arrangement facilitated by Iran" . This language grants Tehran a measure of control over the process—control that the European statement seems designed to preempt. Analysts note this sets up a direct conflict: the E4 is demanding unrestricted navigation while the MOU ties reopening to Iranian oversight .

Key Terms of the US-Iran Memorandum of Understanding

The final text of the 14-point MOU has not been officially released, but its core provisions have been reported by senior US officials and leaked by Iranian state media . The agreement is structured in two stages.

Stage 1: Immediate Terms (60-Day Framework)

• Permanent and immediate cessation of hostilities on all fronts, including Lebanon .
• The Strait of Hormuz reopens without tolls; this is an immediate requirement .
• The US naval blockade on Iranian ports is lifted .
• The United States commits to non-interference in Iran's internal affairs and respect for its sovereignty .
• US sanctions are to be lifted, and frozen Iranian assets abroad are to be released. Mehr News reports this includes the release of $24 billion in frozen assets during the 60-day talks .
• Iran's highly enriched uranium must be "destroyed on site and then taken out of the country" .
• US forces are to withdraw from positions around Iran .

A critical sequencing detail reported by US officials is that "the Iranians don't get anything upon the signing of the MOU or upon the negotiation itself." Economic rewards—sanctions relief and asset releases—are contingent on Iran complying with its obligations, such as turning over nuclear material .

Stage 2: To Be Negotiated Within 60 Days
The second stage mandates comprehensive negotiations on Iran's nuclear program. This includes limits on enrichment levels and stockpiles, verification mechanisms, and the framework for a permanent agreement .

The Mediator: Oman's Quiet Diplomacy

Oman was the primary, and essentially sole, mediator throughout the 2025–2026 negotiations that led to the MOU. Omani Foreign Minister Badr Albusaidi shuttled between US and Iranian delegations during indirect talks that began on April 12, 2025, at the sultan's palace in Muscat, and later alternated between Geneva and Rome .

In late February 2026, Albusaidi publicly described a "breakthrough" after a round in Geneva, stating that Iran had agreed to zero stockpiling of any uranium . He told CBS News that a "peace deal is within our reach" and that Iran had agreed it would "never, ever have nuclear material that will create a bomb" .

Oman was uniquely suited for this role. A Sunni Gulf Arab state, it has cultivated decades-long diplomatic ties with both Washington and Tehran, as well as with non-state actors like Yemen's Houthis, allowing it to serve as an indispensable backchannel . Throughout the talks, Albusaidi worked with US Special Envoy Steve Witkoff and Iranian Foreign Minister Abbas Araghchi, often holding separate meetings to relay proposals and counter-proposals .

The MOU is an interim framework, not a final peace treaty. The European commitment to sanctions relief is real but conditional, and the demand for unconditional navigation of the Strait of Hormuz—the chokepoint through which roughly 20% of the world's oil transits—reveals the next diplomatic battle has already begun .