Federal agencies with more than $100 million in annual research and development funding are required to facilitate public access to funded research, per a directive from the White House in February 2013. Many agencies have released their plans and adjusted the requirements for grant applicants and awardees. If you are looking for more information about a granting agency’s requirements for sharing research, we recommend the SPARC website: Article and Data Sharing Policies.
Foundations that award grants are also calling for open access to the outputs from research they sponsor. For example, the Bill & Melinda Gates Foundation adopted an Open Access Policy on January 1, 2015 that requires all publications and their underlying data to be discoverable, accessible, and open immediately.
For assistance complying with funding mandates to make your research outputs accessible, there are resources available from: