The unfortunate asterisk is that enriching from 60% to 90% takes comparatively little time and equipment. We're not absolutely certain there isn't another small, yet-undiscovered, secret enrichment plant.
> "Let's say Iran decides to rush a bomb. Iran can install ~1.5 cascades a week. In six weeks, it could have 9 cascades of IR-6 machines. It would take those machines about 60 days to enrich all 400 kg to WGU. Altogether that's about five months although IMMV."
Here's highly-cited nuclear weapons expert Jeffrey Lewis:
> "Let's say Iran decides to rush a bomb. Iran can install ~1.5 cascades a week. In six weeks, it could have 9 cascades of IR-6 machines. It would take those machines about 60 days to enrich all 400 kg to WGU. Altogether that's about five months although IMMV."
https://bsky.app/profile/armscontrolwonk.bsky.social/post/3l...