It is acceptable for senior personnel to commit time and resources to a project without requesting salary. In this case, an aggregated description of the resources that will be provided, should the proposal be funded, should be included in the Facilities, Equipment and Other Resources section of the proposal. That description should be narrative in nature and must not include quantifiable financial information. This is considered voluntary uncommitted cost sharing, which is permissible on NSF proposals.
Note: Requires BioMed Approval.