42 U.S. Code § 15003 - Records and audits
Each recipient of assistance under this subchapter shall keep such records as the Secretary shall prescribe, including—
(1) records that fully disclose—
(B) the total cost of the project or undertaking in connection with which such assistance is given or used; and
The Secretary and the Comptroller General of the United States, or any of their duly authorized representatives, shall have access for the purpose of audit and examination to any books, documents, papers, and records of the recipients of assistance under this subchapter that are pertinent to such assistance.