42 U.S.C. § 295o

The Secretary may require that an entity that applies for a grant or contract under this subchapter provide non-Federal matching funds, as appropriate, to ensure the institutional commitment of the entity to the projects funded under the grant. As determined by the Secretary, such non-Federal matching funds may be provided directly or through donations from public or private entities and may be in cash or in-kind, fairly evaluated, including plant, equipment, or services.