It’s all foreign guest researchers by the end of September, high risk countries by the end of March. Your first quote doesn’t imply the NIST sources for this article don’t have firsthand knowledge that this is coming, it’s just that it appears the lab management is avoiding putting things in writing
> Researchers from lower risk countries have been told they could lose access beginning in either September or December if at that point they have been at the lab more than 2 years or, under a waiver, 3 years.
The word "could" seems to conflict with "It's all foreign guest researchers by end of September."
If you think that's what he meant, then it's clear that Bob has made things incredibly ambiguous since we disagree. Do you think he might have written the article, and especially the headline, in such a way as to make it more clickable?
I don’t know why the author of the article wrote “could”, but I personally work closely with some non-high-risk-country NIST foreign guest researchers. It’s been filtered down verbally through the management chain that the end of this September is the re-review deadline, and it’s not been stated as a hypothetical.