An increasing number of research funders require researchers to comply with their requirements for formal management and sharing of research data. These policy requirements vary by the funder, but in general, project proposals are expected to include a data paragraph. After the project is granted, many funders require you to provide a full data management plan (DMP) as an early deliverable (this is compulsory for all funded projects within programs of the NWO and the EU Horizon 2020).
Links to the grant conditions specified by various research funders: