This is true, but with a couple huge caveats. NIH-funded papers published before April 7, 2008 are not applicable to the public access requirements. Research

This is true, but with a couple huge caveats. NIH-funded papers published before April 7, 2008 are not applicable to the public access requirements. Research published using NSF grant proposals submitted before Jan 25, 2016 is also exempt. This encompasses the vast majority of all existing NIH and NSF-funded work, and includes many yet-to-be-published NSF papers. In addition, NSF-funded research does not need to be made public access until a full 12 months after initial journal publication.