The document discusses the evolution and implementation of open access (OA) publishing, emphasizing that the focus has shifted from whether OA is beneficial to how it is implemented across various stakeholders, including national governments and research institutions. It outlines different types of OA, the policies influencing their adoption at various levels (national, funder, institutional), and highlights specific case studies such as the U.S. NIH's policies on OA. The conclusion presents two potential future scenarios regarding the role of publishers and the research community in shaping the OA environment.