Kudos to the Howard Hughes Medical Institute (#HHMI) for strengthening its 2022 #OpenAccess policy to require the immediate sharing of new research through #preprints under #CCBY licenses.
https://hhmicdn.blob.core.windows.net/policies/Immediate-Access-to-Research.pdf
This kind of policy is often called #Plan_U, though HHMI doesn't use that term. The policy takes effect January 1, 2026.
For background, here are the items tagged with "oa.plan_u" in the Open Access Tracking Project (#OATP, @oatp).
https://tagteam.harvard.edu/hubs/oatp/item_search?q=oa.plan_u