On June 15, 2026, the United States and Iran signed a 14-point memorandum of understanding. The active war — which began when the United States and Israel conducted extensive airstrikes against Iran’s nuclear and military infrastructure — officially ended. The Strait of Hormuz, through which roughly one-fifth of the world’s traded oil passes, was reopened to commercial shipping. A 60-day negotiating window began.

What happens in those 60 days will determine whether the MOU becomes a meaningful nuclear agreement or an expensive ceasefire.

The Joint Comprehensive Plan of Action was finalized on July 14, 2015, after formal negotiations that had begun with an interim agreement — the Joint Plan of Action — in November 2013. Twenty months of structured talks. The negotiating parties were the P5+1: the five permanent members of the UN Security Council (the United States, the United Kingdom, France, Germany, Russia, and China) plus the European Union. Eight parties on one side. Iran on the other.

The final document ran to 159 pages and five technical annexes, among the most technically detailed multinational agreements in recent history. What those pages required:

• Iran’s uranium enrichment capped at 3.67% — sufficient for civilian power generation, well below the 90% required for a weapon
• Iran’s total uranium stockpile reduced by 97%, from 10,000 kg to 300 kg
• Operating centrifuges cut from approximately 19,000 to 5,060, with enrichment restricted to a single facility
• The Arak heavy water reactor, capable of producing weapons-grade plutonium, redesigned
• The International Atomic Energy Agency granted extensive inspection and monitoring access
• In exchange: nuclear-related sanctions from the United States, the European Union, and the United Nations lifted
• Duration: 15 years, with staggered sunset clauses — the arms embargo expired in 2020, centrifuge restrictions in 2026, enrichment caps in 2031

Trump’s objections to the JCPOA were consistent across his first term. He argued the deal’s sunset clauses gave Iran a legal pathway to nuclear weapons after expiration. He said it failed to address Iran’s ballistic missile program. He wanted Iran’s regional proxy activity — Hamas, Hezbollah, the Houthis — included in any new agreement. He called for tighter inspections and no enrichment at all. In May 2018, he formally withdrew the United States from the JCPOA and launched the “maximum pressure” campaign: sweeping sanctions targeting Iran’s oil exports, banking system, and shipping sector.

The maximum pressure campaign severely damaged Iran’s economy. It did not slow Iran’s nuclear program. The opposite occurred.

Starting in mid-2019, Iran began methodically exceeding the JCPOA’s core limits. Enrichment levels climbed. Stockpiles grew. IAEA access was progressively restricted until, by February 2021, Iran had largely cut off the agency’s monitoring.

By the time U.S. and Israeli airstrikes began in June 2025, Iran held approximately 440 to 460 kg of uranium enriched to 60%. The distance from 60% to weapons-grade (90%) is technically very short: 99% of the separative work required to reach weapons grade has already been performed on 60%-enriched material. Trump’s own special envoy Steve Witkoff stated that Iran’s stockpile could be converted to weapons-grade material within one to two weeks. At that quantity and purity, it would be sufficient to fuel nine nuclear weapons.

The IAEA estimated that Iran’s breakout time, the period required to produce enough fissile material for a single weapon, had gone from more than a year under the JCPOA to approximately one week by late 2024.

The 14-point memorandum signed June 15 is not a nuclear agreement. It is a framework that commits both parties to negotiate one over the next 60 days. What the document contains:

• Immediate and permanent end to military operations on all fronts, including Lebanon
• The Strait of Hormuz reopened to commercial shipping, toll-free, for 60 days only; demining within 30 days
• Iran’s near-bomb-grade uranium stockpile to be “down-blended” using a “minimum methodology” under IAEA supervision — no specific target enrichment level, no quantity, no timeline
• Iran reiterates its pledge not to acquire nuclear weapons — the same pledge it made in the JCPOA
• The United States will work with regional partners to develop a $300 billion reconstruction and development fund for Iran; mechanism and sourcing to be decided in the 60-day window
• The U.S. commits to provide sanctions waivers and licenses as needed

What the document does not specify: an enrichment cap, centrifuge limits, a stockpile reduction target, IAEA inspection protocols, ballistic missile restrictions, a duration, or any enforcement mechanism.

Iran’s enrichment level when the JCPOA was signed: capped at 3.67%. Iran’s enrichment level at the signing of the 2026 MOU: 60%.

The JCPOA offered Iran sanctions relief — the lifting of restrictions on its own money and trade. The 2026 MOU commits the United States to work with regional partners to develop a $300 billion reconstruction and development fund for Iran.

Trump disputed the characterization. “There is no $300 billion payment to Iran by the U.S.,” he said. Vice President JD Vance said the funds would come from Gulf partners, not American taxpayers. Senior administration officials said the language provides for sanctions waivers that would allow third countries and private investors to participate in reconstruction projects inside Iran, not a direct American payment.

Critics from both parties found that framing insufficient. Sen. Roger Wicker (R-MS) said the fund would make the JCPOA’s sanctions relief “look like a pittance by comparison.” Sen. Lindsey Graham (R-SC) called it “tone deaf.” Senate Minority Leader Chuck Schumer said Democrats “will not be helping Trump send $300 billion to Iran.” The sourcing, conditions, and mechanism for the fund remain entirely unresolved. All of it deferred to the 60-day window.

For the 2026 MOU to become anything comparable to the JCPOA, the next 60 days would need to produce: an enrichment cap, centrifuge limits, a specific plan for the existing 60%-enriched stockpile, IAEA inspection protocols, a resolution on ballistic missiles, a mechanism for the $300 billion fund, a defined duration, and an enforcement architecture.

The JCPOA required 20 months and 8 negotiating parties to produce answers to those same questions.

The 60-day window closes in mid-August.