Donald Trump says Iran war deal close as Strait of Hormuz tensions linger

The US administration indicated that a broad peace and ceasefire memorandum of understanding (MoU) with Iran was "largely negotiated," including provisions f...

What Happened

The US administration indicated that a broad peace and ceasefire memorandum of understanding (MoU) with Iran was "largely negotiated," including provisions for the reopening of the Strait of Hormuz and a framework for curbing Iran's nuclear programme.
Iranian state media and officials disputed the US characterisation of the deal's terms, stating that Iran had made no commitments on its nuclear programme or on ceding control of the Strait of Hormuz in the current draft MoU.
Iran's official position, including as reported by state news agency IRNA, maintained that nuclear enrichment is a sovereign right under Article IV of the Nuclear Non-Proliferation Treaty (NPT), and that Iran's red lines on enrichment would not be compromised.
A proposed 60-day ceasefire extension framework would, per the US account, allow the Strait to reopen and permit Iran to freely sell oil, with negotiations on the nuclear programme to follow.
The Strait of Hormuz, closed by Iran since 28 February 2026 following the US-Israel military campaign against Iran, remained a point of active tension with continuing attacks on commercial shipping even during ongoing diplomatic engagement.

Static Topic Bridges

Iran Nuclear Programme and the JCPOA Framework

The Joint Comprehensive Plan of Action (JCPOA), concluded in Vienna on 14 July 2015 between Iran and the P5+1 (the five permanent members of the UN Security Council — US, UK, France, Russia, China — plus Germany), was designed to constrain Iran's nuclear programme in exchange for sanctions relief. Under the JCPOA, Iran agreed to limit uranium enrichment to 3.67%, cap its enriched uranium stockpile, reduce centrifuge numbers, redesign the Arak heavy-water reactor, and accept enhanced IAEA inspections.

JCPOA signed: 14 July 2015; implementation began January 2016.
US withdrew from the JCPOA under the Trump administration on 8 May 2018; Iran responded by progressively violating enrichment limits from May 2019.
As of 2026, Iran's uranium enrichment has reached 60% — well above the JCPOA limit of 3.67% and approaching the 90% weapons-grade threshold.
Iran's enriched uranium stockpile is approximately 30 times the level permitted under the JCPOA.
The JCPOA also involved the UN Security Council endorsing the deal through UNSCR 2231 (2015), which incorporated the "snapback" mechanism for reimposing UN sanctions.
Renewed US-Iran nuclear talks took place in 2021–22 but failed to produce a revised agreement; the 2025 "Twelve-Day War" (US-Israel strikes on Iranian nuclear infrastructure) further altered the landscape.

Connection to this news: The 2026 negotiations represent a post-conflict attempt to construct a new framework — distinct from the JCPOA — after military escalation has already changed facts on the ground. Iran's insistence on enrichment rights under the NPT frames its red lines in the current talks.

Non-Proliferation Treaty (NPT) and the Right to Enrichment

The Treaty on the Non-Proliferation of Nuclear Weapons (NPT), opened for signature on 1 July 1968 and entered into force on 5 March 1970, is the foundational global nuclear non-proliferation framework. It rests on three pillars: non-proliferation (non-nuclear states not acquiring weapons), disarmament (nuclear states reducing stockpiles), and peaceful use (all parties' right to peaceful nuclear energy). Article IV explicitly recognises the "inalienable right" of all parties to develop research, production, and use of nuclear energy for peaceful purposes.

NPT parties: 191 states (as of 2026); non-parties include India, Pakistan, Israel, and South Sudan.
Iran ratified the NPT in 1970 and has long cited Article IV as the basis for its enrichment programme.
The IAEA, established in 1957 (headquartered in Vienna), is the UN's nuclear watchdog; it administers safeguards agreements with NPT signatories to verify peaceful use.
The "Additional Protocol" (1997) provides for more intrusive IAEA inspections; Iran suspended its Additional Protocol cooperation after US withdrawal from the JCPOA.
Iran's position: enrichment is a sovereign right under the NPT; zero-enrichment demands are unacceptable.
India's NPT status: India is not a signatory to the NPT. India obtained a special exemption through the India-US Civil Nuclear Agreement (2008), which was operationalised through the IAEA-India safeguards agreement and NSG waiver.

Connection to this news: Iran's stated "red lines" in the 2026 negotiations centre on its NPT Article IV right to enrich uranium, the same argument it has used since the JCPOA negotiations and which remains the core sticking point in any deal.

Strait of Hormuz — Strategic and Legal Significance

The Strait of Hormuz is the world's most critical maritime energy chokepoint. It connects the Persian Gulf to the Gulf of Oman and the Arabian Sea, and through it flows approximately 25% of the world's seaborne oil trade and around 20% of global LNG before the 2026 crisis. Under UNCLOS (Articles 37–44), the Strait qualifies as an "international strait" subject to the right of transit passage — continuous and unobstructed navigation — which coastal states (Iran and Oman are the two littoral states) cannot suspend.

Width at narrowest point: 21 nautical miles.
Littoral states: Iran (north) and Oman (south).
Iran closed the Strait on 28 February 2026 following US-Israel military operations; this was Iran's first actual — as opposed to threatened — closure of the waterway.
The US is not a formal signatory to UNCLOS but treats transit passage as customary international law and conducts Freedom of Navigation Operations (FONOPs).
The UN Security Council passed a resolution calling for immediate restoration of freedom of navigation through the Strait.
The current draft MoU proposes a 60-day ceasefire during which the Strait would reopen, but Iran disputes whether it has agreed to this formulation.

Connection to this news: The reopening of the Strait is the central economic and humanitarian demand from the international community; its status in the negotiations is the primary flashpoint between the US and Iranian accounts of what has been agreed.

Memorandum of Understanding (MoU) vs. Binding Treaty in International Law

In international diplomacy, agreements range on a spectrum from non-binding political statements to fully binding treaties. A Memorandum of Understanding (MoU) is typically a non-binding instrument that records intent and framework — it does not create enforceable legal obligations under international law. A formal Treaty, by contrast, is binding under the Vienna Convention on the Law of Treaties (VCLT, 1969). A ceasefire agreement may be a hybrid — operationally binding in military terms but not necessarily legally enforceable before international tribunals.

Vienna Convention on the Law of Treaties (VCLT): adopted 23 May 1969; in force 27 January 1980.
The US constitution requires Senate ratification (two-thirds majority) for treaties; executive agreements (including MoUs) bypass this requirement and are used more frequently.
Iran's Supreme National Security Council, which reports to the Supreme Leader, has authority over all major national security agreements.
Historical precedent: the original JCPOA was structured as a political commitment rather than a legally binding treaty, which enabled unilateral US withdrawal without violating international law.
The current MoU framework would similarly risk being non-binding, replicating the structural fragility of the JCPOA.

Connection to this news: The disputed characterisations of the current draft MoU's content — with the US and Iran providing contradictory accounts of what has been agreed on enrichment and Hormuz — reflect the inherent ambiguity of non-binding diplomatic instruments and foreshadow implementation challenges.

Key Facts & Data

JCPOA signed: 14 July 2015 (Vienna); P5+1 parties: US, UK, France, Russia, China, Germany
US withdrawal from JCPOA: 8 May 2018
Iran's current uranium enrichment level (2026): ~60% (weapons-grade threshold: ~90%)
Iran's enriched uranium stockpile (2026): approximately 30 times the JCPOA permitted level
NPT opened for signature: 1 July 1968; in force: 5 March 1970; parties: 191 states
NPT Article IV: inalienable right to peaceful nuclear energy use
UN Security Council Resolution endorsing JCPOA: UNSCR 2231 (2015)
Strait of Hormuz width (narrowest): 21 nautical miles
Pre-crisis share of global seaborne oil through Hormuz: ~25%
Pre-crisis share of global LNG through Hormuz: ~20%
Strait closure date: 28 February 2026
UNCLOS transit passage provisions: Articles 37–44 (Part III)
VCLT adopted: 23 May 1969; in force: 27 January 1980
India-US Civil Nuclear Agreement (123 Agreement): signed 2008; NSG waiver: September 2008