The revised implementation guidelines for Plan S were published last week by cOAlition S.
Noteworthy changes include
-> the postponement of Plan S' commencement date (January 2021)
-> increased compliance routes
-> cOAlition S members' commitment to review the alignment of their research assessment policies to the DORA declaration.

More information can be found here
https://www.coalition-s.org/principles-and-implementation/
https://www.coalition-s.org/rationale-for-the-revisions/