54 U.S.C. § 308303 — Preservation and interpretation of Underground Railroad history, historic sites, and structures

(a) Authority To Make Grants. The Secretary may give grants under this section to preserve and restore historic buildings or structures connected to the Underground Railroad, and to fund related research and documentation for sites, programs, or facilities that are part of the national network. (b) Grant Conditions. Every grant must include conditions that (1) no change or alteration can be made to the property the grant is used for, unless both the property owner and the Secretary agree; (2) the Secretary has the right to visit the public parts of the property at reasonable times, for interpretive and other purposes; and (3) if the property is converted, used, or gotten rid of for purposes that go against this chapter, as the Secretary decides, the United States has the right to be paid back the full amount of federal money it gave the grantee under this chapter. (c) Matching Requirement. The Secretary can only commit grant funds if the grantee agrees to match the grant with an equal or greater amount of money from non-federal sources. The Secretary may waive this matching requirement if there's an extreme emergency, or if waiving it serves the public interest by helping to preserve historically significant resources.