Iran and six external powers agree limits on Iran's nuclear programme in exchange for sanctions relief, endorsed by the Security Council in Resolution 2231.
Why it mattersEverything in the module's nuclear file is downstream of this instrument, including the snapback mechanism that returned United Nations sanctions in 2025 and the verification arrangements whose collapse is now the central unknown.
Confidence: HighSources: UN Security Council and Panel of Experts reporting↗ · Established historical recordMethodologyCorrections
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