US sets new demands for Iran deal: What are they?

What new nuclear restriction is the United States asking Iran to accept in a possible deal?

The proposed restriction targets Iran’s ability to enrich uranium to high levels. Vice President JD Vance said Iran should show it does not seek nuclear weapons by changing its enrichment program. This matters because enrichment capacity can shorten the time needed to produce weapons-grade material.

Vance specifically questioned why Iran needs fuel enriched to 60 percent if it does not want a bomb. Weapons-grade uranium is generally associated with about 90 percent enrichment. The United States therefore appears to be demanding a lower capacity or lower enrichment level, though officials have not publicly defined the exact limit.

The request may signal flexibility compared with an absolute demand that Iran abandon enrichment. However, Secretary of State Marco Rubio still says Iran cannot have a nuclear weapon. Sanctions, military pressure, and disagreements over regional fighting remain major barriers to an agreement.

What is uranium enrichment, and why can it be used both for nuclear power and for nuclear weapons?

Uranium enrichment is the process of increasing the share of uranium-235 in uranium. Natural uranium contains only a small amount of this isotope. Enrichment makes the material more useful for nuclear reactors, which need controlled nuclear fission to produce energy. The same basic process can continue to higher concentrations.

The difference is the enrichment level and how the material is used. Reactor fuel usually has lower enrichment, while uranium enriched to roughly 90 percent is generally considered weapons-grade. Iran’s reported 60 percent material is below that level, but it is much closer than ordinary reactor fuel. That makes it a central concern in negotiations.

Enrichment itself does not prove that a country is building a bomb. The article says the International Atomic Energy Agency found no credible evidence of a structured nuclear weapons program in its May 2025 assessment. Still, advanced enrichment can create concern because it reduces the time needed to reach weapons-grade material.

How much has Iran enriched uranium, and how does that compare with the roughly 90 percent level generally considered weapons-grade?

The International Atomic Energy Agency reported that Iran had enriched uranium to 60 percent. That figure describes the concentration of uranium-235 in the material. Enrichment levels matter because higher concentrations can make the material more suitable for different nuclear purposes, including, at the highest levels, weapons production.

The commonly cited weapons-grade benchmark is about 90 percent. Iran’s 60 percent material is therefore 30 percentage points below that benchmark. The gap does not mean the issue is insignificant. Moving from lower enrichment to 60 percent represents a substantial technical step, so critics say it could reduce the time needed to produce weapons-grade material.

The article also reports that the IAEA found no credible indications of a structured nuclear program in May 2025. Thus, the number creates concern but does not by itself establish that Iran is building a nuclear weapon. The dispute is over safeguards, intent, and acceptable limits.

What could happen to the war, regional security, and negotiations if Iran refuses to reduce its enrichment capacity?

If Iran refuses to reduce its enrichment capacity, the immediate effect could be a wider negotiating gap. Washington could maintain sanctions, military pressure, and its demand that Iran demonstrate it is not pursuing a nuclear weapon. Tehran could respond by rejecting talks or preserving its current nuclear position.

The article gives no guaranteed chain of events. President Trump says the war will end either “the nice way or the not-so-nice way,” while Rubio emphasizes pressure on Iran. Iran’s president says talks have repeatedly been followed by attacks. These statements show how a nuclear dispute can become tied to military escalation and mistrust.

Regional security could suffer if fighting continues across the region or if other governments fear Iran’s capabilities. Negotiations might still continue, since Foreign Minister Abbas Araghchi says fair talks could end the conflict. But refusal would likely make sanctions relief, frozen-asset releases, and an end to the blockade harder to secure.

Why does Iran say sanctions, the naval blockade, frozen assets, and fighting across the region matter more than enrichment restrictions?

Iran’s position is that negotiations cannot focus only on enrichment while the country faces sanctions, a naval blockade, frozen assets, and fighting across the region. These measures affect Iran’s economy, trade, access to money, and military security. Tehran therefore sees them as immediate costs rather than distant nuclear questions.

The article says Professor Simon Mabon considers Iran’s pursuit of a nuclear weapon remote. He identifies sanctions, frozen Iranian assets, the US naval blockade, and regional fighting as the main obstacles to a deal. Iran’s proposed settlement reportedly linked an end to fighting with lifting the blockade and oil sanctions and releasing frozen funds.

This explains why Tehran questions Washington’s intentions. President Masoud Pezeshkian says talks have been followed by attacks and broken promises. Foreign Minister Abbas Araghchi nevertheless leaves room for negotiations based on fairness. Iran appears to want security and economic relief alongside any nuclear compromise.

What was the 2015 Joint Comprehensive Plan of Action, and why is it relevant to the possibility of allowing Iran limited enrichment today?

The Joint Comprehensive Plan of Action, agreed in 2015, was a deal between Iran and major powers to limit Iran’s nuclear program. Iran accepted restrictions and international monitoring in return for relief from nuclear-related sanctions. The agreement aimed to keep Iran’s program civilian and lengthen the time needed to produce weapons material.

A central feature was that Iran did not have to eliminate all enrichment. It accepted limits on enrichment levels, centrifuges, stockpiles, and facilities. That history is relevant because Vance now calls for a “meaningful” reduction, rather than clearly demanding the complete end of enrichment. The earlier model suggests a possible compromise based on limits and verification.

The source article does not discuss the JCPOA directly. More broadly, its relevance is historical: the agreement demonstrates that limited enrichment and international monitoring can coexist in a negotiated framework. Any new deal would still face disputes over sanctions, trust, enforcement, and regional security.

How do sanctions and control of strategic waterways such as the Strait of Hormuz give countries leverage in international negotiations?

Sanctions create leverage by raising the economic price of a government’s policies. They can limit oil sales, banking, investment, and access to frozen money. A naval blockade can go further by restricting trade and supplies. These pressures may push a country toward negotiations, especially when its economy is already weak.

Strategic waterways add another mechanism. The Strait of Hormuz is a major route for energy shipments, so threats to its access can affect markets, shipping, and regional security. The article says Iran proposed reopening the strait as part of a wider settlement, while Washington’s proposal reportedly included lifting its naval blockade. Each side can therefore connect access with political concessions.

This leverage can produce talks, but it can also intensify mistrust. Iran says pressure and broken promises make negotiations futile. The United States says sanctions pressure is necessary. A durable agreement would need credible steps on trade, waterways, assets, and security, not only enrichment.

Key Facts:

📌 Vance wants Iran to make a “meaningful” reduction in enrichment capacity.

📌 Iran has enriched uranium to 60 percent.

📌 Rubio says Iran cannot have a nuclear weapon.

📌 Enrichment increases the concentration of uranium-235.

📌 Lower enrichment can support civilian nuclear reactors.

📌 Roughly 90 percent enrichment is generally considered weapons-grade.

📌 Iran has enriched uranium to 60 percent.