Introduction 

On June 18, 2026, the United States and Iran signed a 14-point Memorandum of Understanding, dubbed the Islamabad MOU, committing to negotiate a roadmap to end hostilities that had commenced in late February 2026. Over the course of roughly four months, the conflict rippled across the region, exacting significant costs on neighboring states, severely disrupting traffic through the Strait of Hormuz, a critical maritime chokepoint, and weighing heavily on the global economy.  

The 14-point framework mandates an end to hostilities and opens a track for establishing a lasting settlement, essentially converting a difficult stalemate into a diplomatic process while deferring the most complex challenges to a 60-day negotiation window. The MOU also marks a significant development for various stakeholders, particularly for the GCC states, who absorbed the largest share of the conflict’s spillover, incurring substantial economic and security costs from Iranian strikes on their territory.  

While the deal is a positive development for the warring parties, the affected neighboring states, the wider region, and the international community at large, enforcing it will be difficult without effectively addressing several issues. Some of these issues were contentious throughout the war, such as the nuclear file, while others are new dynamics that will make the regional picture significantly more complicated. 

Addressing these challenges will be essential to restoring long-term stability in the region. Ultimately, Iran, the United States, and the range of state and non-state actors implicated in this settlement will have to demonstrate considerable political will to achieve a lasting peace. This process will likely face significant pressure from a number of bottlenecks, namely establishing a robust framework for Iran’s nuclear program and managing ongoing hostilities on the Lebanese front.

Strategic Constraints 

The Nuclear File  

Under Article 8 of the MOU, Iran commits to neither developing nor pursuing a nuclear weapon. However, the agreement at this stage does little to present a detailed framework for the accountability mechanisms needed to ensure Iranian compliance. It instead defers to reaffirming Tehran and Washington’s shared commitment to preventing the former from developing or possessing nuclear weapons. 

The agreement does, however, stipulate that Iran is to down blend its stockpile of enriched material, under IAEA supervision. This would dilute the most dangerous part of the inventory, the material enriched to around 60 percent, a short technical step from weapons grade, and reduces the immediate breakout risk.  

That said, tensions surrounding the implementation of this process are already emerging. While IAEA Director General Rafael Grossi affirmed that plans for the agency’s inspection visit were underway, Iran’s Deputy Foreign Minister Kazem Gharibabadi stated that there were no current plans to grant access to targeted nuclear facilities or enriched materials. This exposes the limits of treating the MOU as a sufficient step toward a durable resolution. 

Given the volatility of U.S.-Iran relations, maintaining the consistent engagement of third-party actors capable of managing future escalations or breakdowns will be crucial. This was demonstrated during the first round of negotiations, when talks appeared on the verge of collapse amid rising tensions between Tehran and Washington. This underscores the importance of the roles that Qatar, Pakistan, and the broader Gulf states will play in navigating what is likely to be a delicate and fraught sixty days. 

It is also worth noting that the previous landmark agreement with Iran, the Joint Comprehensive Plan of Action (JCPOA), incorporated the E3 (France, Germany, and the United Kingdom), which reinforces the importance of keeping this track multilateral rather than a bilateral process.  

Looking ahead, the sixty-day period will ultimately determine the fate of Iran’s nuclear capabilities, or lack thereof. In its current form, this arrangement falls considerably short of the 2015 JCPOA framework, under which Iran shipped over 97 percent of its enriched uranium out of the country. 

The current agreement, and ultimately its outcomes, also carries significant implications for global nonproliferation efforts. By treating Iran’s enrichment capacity as something to be negotiated, monitored, and managed rather than entirely eliminated, the deal establishes a precedent that other states in the region will study closely as they assess their own future nuclear ambitions. 

The Lebanese Front  

While the MOU affirms a commitment by Iran, the United States, and their respective allies to cease hostilities on all fronts, it only establishes Israeli compliance in theory; in practice, Israel has continued its strikes on Lebanon and has made clear that operations will persist as long as it deems national security threats to be present. 

It is worth noting that in early June, following two months of relative calm, an escalation on the Lebanese front led to a brief resumption of U.S.-Iran hostilities. This underscores the importance of securing Israeli compliance as a cornerstone not only of reaching a comprehensive agreement within the next sixty days, but of sustaining long-term regional stability. 

Within the next sixty days, this remains a difficult factor to manage, as Israel is not a party to the negotiations despite being instrumental in realizing the terms agreed upon. Israeli officials have also increasingly adopted an aggressive rhetoric toward Lebanon, with Israeli National Security Minister Ben Gvir calling to “burn all of Lebanon.” 

This is also tied to a broader structural challenge. Despite being formally distinct, the Iran-U.S. negotiating track and the Israel-Lebanon track are becoming increasingly difficult to treat as separate processes. Escalations on the Lebanese front have already demonstrated their capacity to derail progress on a broader U.S.-Iran agreement. A sustainable settlement may require some degree of convergence between both tracks or a level of coordination sufficient to ensure that developments on one front do not threaten to unravel progress on the other.  

In its current form, it is difficult to see how this fragile arrangement holds together when actors consequential to the deal’s durability remain outside it. These challenges may be compounded further by the  U.S.-Israel-Lebanon trilateral framework, which is already being met with fierce opposition, risking escalating tensions in Lebanon. The future of the U.S.-Iran agreement will therefore depend not only on American and Iranian compliance, but also on the willingness of their respective allies to adhere to its provisions against the backdrop of a multi-layered landscape. 

Conclusion 

While navigating the tensions surrounding these issues will define the trajectory of the next sixty days, and ultimately whether a deal is realized, the negotiating parties and mediators will also have to contend with questions surrounding reconstruction, non-aggression guarantees, and the restoration of freedom of navigation. The durability of the agreement, and of regional security more broadly, will depend on the willingness of both Iran and the United States to sustain meaningful engagement throughout the sixty-day implementation period.  

The coming two months will be critical in determining whether the deal evolves into a durable framework for regional stability and economic recovery. The MOU’s significance may ultimately lie in its potential to open a diplomatic channel that, if sustained, could form the basis of a more comprehensive settlement. Whether that opening is seized will depend on factors that currently remain largely beyond the agreement’s reach.  

Hana Elshehaby and Meissa Haouari contributed to this situation assessment.