VERSAILLES – US President Donald Trump and Iranian President Masoud Pezeshkian have electronically signed a memorandum of understanding to extend a ceasefire in the US-Iran war, establishing a narrow 60-day window to prevent a total regional collapse.
The “Islamabad MoU,” brokered by Pakistan, went into effect Wednesday, pausing a conflict that began on February 28 when the United States and Israel launched coordinated strikes against Iranian territory. The agreement follows a period of intense volatility, including a temporary ceasefire on April 8 that had only partially suspended the most severe hostilities.
The interim deal is designed to stabilize global energy markets and provide a diplomatic runway for negotiations on the most contentious issues of the bilateral relationship: Iran’s nuclear ambitions, the restoration of frozen Iranian assets, and the lifting of sweeping US economic sanctions.
Central to the memorandum is Iran’s reaffirmation of its commitment to not develop a nuclear weapon and the immediate reopening of the Strait of Hormuz. As the world’s most critical oil transit chokepoint, the Strait’s closure has threatened a global energy crisis, making its reopening a primary objective for international stakeholders.
The Versailles Signing and Domestic Friction
The agreement was finalized in a high-profile setting, with President Trump physically signing the interim deal at the Palace of Versailles near Paris. During the ceremony, Trump paused before signing the first page, acknowledging the diplomatic strain of the process.
“This was not easy,” Trump told the assembled audience, holding out his hands. “I can tell you that.”
US officials say the text of the Islamabad MoU draws in part on verification and safeguards language used in earlier nuclear agreements, including the 2015 Joint Comprehensive Plan of Action and the underlying inspection regime of the Treaty on the Non‑Proliferation of Nuclear Weapons, but stops short of a full return to those frameworks.
Despite the optics of a diplomatic breakthrough, the deal has ignited a political firestorm within the US Republican Party. Critics among Trump’s own ranks argue the framework is too lenient, claiming it fails to sufficiently restrict Tehran’s nuclear capabilities and wastes billions in taxpayer funds. They have also questioned whether a 60-day window is sufficient to lock in durable constraints before another election cycle further polarizes Congress.
However, some Republicans have defended the move as a strategic victory. Senator Roger Marshall praised the memorandum on X, describing it as a “winning deal” and asserting that it surpasses the parameters of the 2015 Joint Comprehensive Plan of Action (JCPOA), the Obama-era agreement from which Trump withdrew in 2018. Supporters argue the MoU gives Washington leverage by tying phased sanctions relief to verified steps on nuclear transparency and regional de-escalation.
Tehran’s Red Lines and Maritime Control
In Tehran, the reaction has been one of cautious, conditional cooperation. Ministry of Foreign Affairs spokesperson Esmaeil Baghaei warned that Iran would monitor Washington’s compliance “without any leniency,” stating that Iran will not “fulfil” its commitments if the US “evades its obligations.”
While Tehran has agreed to discuss the nuclear program and sanctions during the 60-day window, it has established rigid boundaries:
- Iran’s ballistic missile program remains strictly off the negotiating table.
- Tehran will not ship its stockpile of highly enriched uranium abroad.
- The US is expected to compel Israel to respect its commitments to Iran.
Iranian officials have also signaled that any future, legally binding accord would need to be approved through existing state institutions, including the Majles and the Supreme National Security Council, to avoid the perception that the MoU is an informal side deal with limited domestic legitimacy.
Furthermore, Iran announced it will finalize a new management regime for the Strait of Hormuz in partnership with Oman. Under this proposed system, Iran and Oman would “charge fees for services” for ships navigating the waterway, a move that signals Tehran’s intent to assert sovereign economic control over the corridor. Western diplomats say any new fee structure will be closely scrutinized against obligations under the UN Convention on the Law of the Sea, particularly the principle of unimpeded transit passage for commercial shipping.
Regional Security and the Lebanon Front
The agreement has created immediate ripples across the Middle East, particularly in Israel and Lebanon. Prime Minister Benjamin Netanyahu avoided a direct endorsement of the MoU, instead emphasizing the necessity of the US-Israel alliance.
“The struggle is not yet over, and further challenges lie ahead,” Netanyahu said during a function on Thursday. “They require calm judgement, steadfast defence of Israel’s security interests, and at the same time the preservation of our vital relationship with our American friends, who stood shoulder to shoulder with us in this fight – a partnership we deeply appreciate.”
Israeli security officials have framed the 60-day period as a “test phase” for Iran’s regional proxies, warning that any renewed rocket or drone attacks from Lebanese or Syrian territory could quickly unravel the ceasefire and trigger pressure on Washington to walk away from the MoU.
In Lebanon, Hezbollah chief Naim Qassem characterized the ceasefire as a “big victory,” suggesting that the deal provides leverage for Hezbollah’s own standing with Israel.
“We congratulate the Iranian people, leadership and those who support freedom on this big victory, and we thank the Islamic Republic for linking the Lebanon front – the resistance, which has sacrificed a lot – and forcing Israel to stop its aggression,” Qassem said in a televised address.
Qassem insisted that any future negotiations between Lebanon and Israel must focus solely on “mutual security,” explicitly stating that “any proposal under the banner of disarmament will not pass, as this is an Israeli recipe for taking everything and wrecking the country.”
Diplomats in Beirut note that the Islamabad MoU does not directly reference Hezbollah by name but effectively ties calm along the Lebanon-Israel frontier to the broader implementation of the ceasefire, adding a new layer to already complex UNIFIL and Lebanese Armed Forces coordination on the ground.
Global Mediation and Implementation
The diplomatic architecture of the deal relies on a coalition of mediators. Pakistani Prime Minister Shehbaz Sharif, who endorsed the MoU, described the agreement as an “enduring foundation for greater understanding, mutual respect and shared prosperity for the complete region.” For Islamabad, the accord is also a bid to reassert Pakistan’s relevance as a security interlocutor between Washington, Tehran and the Gulf monarchies after years of being sidelined by other regional initiatives.
Qatar’s Ministry of Foreign Affairs echoed this sentiment, calling the MoU a “solid foundation” for the next phase of talks and praising Pakistan’s role in de-escalating the crisis.
The technical implementation of the deal will now shift to Switzerland and the United Nations. Switzerland’s foreign ministry confirmed that representatives from the US, Iran, Pakistan, and Qatar will meet in Burgenstock this Friday for initial implementation talks, where working groups are expected to map out sequencing on oil exports, financial channels, and limits on military activity along contested maritime and land borders.
Simultaneously, the International Atomic Energy Agency (IAEA) is preparing to resume its oversight of Iranian facilities. Director-General Rafael Grossi noted that while the memorandum is a positive step, the primary challenge remains the technical details.
“It is good that the memorandum is there. Now the technical work starts,” Grossi told Reuters. “It is time for the IAEA to sit down with US and Iranian officials to begin formulating concrete steps on handling Tehran’s nuclear programme.”
IAEA officials say they anticipate a phased return of inspectors and monitoring equipment to sites that have been partially or fully offline since the most recent escalation, with reporting lines feeding not only into the agency’s Board of Governors but also into a joint implementation commission created under the MoU.
International Responses
The global community has largely welcomed the de-escalation, citing the potential for lower energy prices and reduced systemic risk. Financial markets reacted cautiously but positively, with traders pointing to the reopening of the Strait of Hormuz as a key factor in easing supply concerns if the ceasefire holds.
French President Emmanuel Macron, who hosted the signing at Versailles, noted that the agreement “paves the way for lasting peace and allows the reopening of the Strait of Hormuz,” adding that it would “enable a decrease in energy prices.” French officials described the ceremony as a deliberate echo of earlier peace conferences held on European soil, aimed at signaling that US-Iran confrontation can be addressed through structured diplomacy rather than open-ended conflict.
In Russia, President Vladimir Putin, speaking at the Russia-ASEAN summit in Kazan, described the deal as a model for future peace agreements, stating that stabilization in the Middle East would be beneficial for global energy markets. Russia’s foreign ministry added that it is “imperative” that all parties strictly adhere to the understandings, including those pertaining to Lebanon.
China’s foreign ministry, via spokesperson Lin Jian, urged both Washington and Tehran to approach upcoming negotiations “rationally and pragmatically.” In Japan, Prime Minister Sanae Takaichi emphasized that “free and safe navigation” in the Strait of Hormuz must be promptly restored through steady implementation, underscoring how heavily Asian importers depend on the waterway.
The US and Iranian delegations are scheduled to convene in Burgenstock on Friday to begin drafting the technical framework for the 60-day ceasefire. Officials on both sides stress that the Islamabad MoU is not, in itself, a final peace treaty but a test of whether long-contested issues – nuclear safeguards, sanctions relief, and regional proxy activity – can be translated into enforceable, verifiable commitments before the window closes.
