As of January 18, 2011, all researchers submitting proposals for National Science Foundation grants are required to submit data management plans (no more than 2 pages) with their proposals.
The NSF Data Management Plan (DMP) requirements specify the following:
Alternatively, a data management plan may consist of a statement that no plan is needed for the project, but the applicant must justify clearly why no plan will be forthcoming.
Several directorates and divisions with NSF offer more specific guidelines:
Credit for this information: Penn State University Libraries