The move is the latest of several recent announcements by Iran to the International Atomic Energy Agency (IAEA) that it plans to further breach the deal, which it started violating in 2019 in retaliation for Washington’s withdrawal from the agreement and the reimposition of US sanctions against Tehran.

Iran has breached the deal’s 3.67% limit on the purity to which it can enrich uranium, but it has only gone up to 4.5% so far, well short of the 20% it achieved before the deal and the 90% that is weapons-grade.

Iran’s letter to the Agency did not say when this enrichment activity would take place, the IAEA statement said. Following the assassination of top nuclear scientist Mohsen Fakhrizadeh in December, Iran’s parliament passed controversial legislation that ordered an immediate ramping up of the country’s uranium-enrichment program to 20 percent and an end to IAEA inspections.