The Nelson Memo, August 2022, "Ensuring Free, Immediate, and Equitable Access to Federally Funded Research" expands upon the 2013 Holdren Memo. This updated policy applies all federally funded research, regardless of the size of the grant or sponsoring agency, including the National Endowment for the Arts and the National Endowment for the Humanities.
For more information see The Scholarly Kitchen's September 6, 2022 post: The Outlook for Data Sharing in Light of the Nelson Memo by Dylan Ruediger
The 2013 memo "Expanding Public Access to the Results of Federally Funded Research," issued by the White House Office of Science and Technology Policy, requires that federally-funded research be made available to the public. Many federal agencies require that researchers submit a Data Management Plan with their grant application, specifying how they plan to organize, preserve, and disseminate the data generated by their research.
Below is a list of links to the funding requirements to selected grant providers.
A full list of Research Funders' Open Access Policies is available on the Sherpa Juliet web site.