This fourth version of the Principles represents a collective effort between the four organizations to align the principles with today’s scholarly publishing landscape. The last update was in 2018, and the scholarly publishing landscape has changed. Guidance is provided on the information that should be made available on websites, peer review, access, author fees and publication ethics. The principles also cover ownership and management, copyright and licensing, and editorial policies.
For further information see https://oaspa.org/revised-principles-of-transparency-and-best-practice-released/