The NIH Public Access Policy ensures that the public has access to the published results of NIH-funded research. It requires scientists to submit the final peer-reviewed journal manuscripts that arise from NIH funds to the digital archive PubMed Central upon acceptance for publication. To help advance science and improve human health, the policy requires that these papers are accessible to the public on PubMed Central no later than 12 months after publication (Source).
"Principal Investigators and their institutions are responsible for ensuring all terms and conditions of awards are met. This includes the submission of final peer-reviewed manuscripts that arise directly from their awards, even if they are not an author or co-author of the paper. Principal Investigators and their institutions should ensure that authors are aware of and comply with the NIH Public Access Policy." -NIH
Policy:
There are 5 steps that need to be addressed to comply with Public Access Policy:
PubMed
PMC (PubMed Central)