42 U.S. Code § 9916 - Fiscal controls, audits, and withholding
Subject to subparagraph (B), each audit required by subsection (a)(1)(C) of this section shall be conducted by an entity independent of any agency administering activities or services carried out under this chapter and shall be conducted in accordance with generally accepted accounting principles.
Audits shall be conducted under this paragraph in the manner and to the extent provided in chapter 75 of title 31 (commonly known as the “Single Audit Act Amendments of 1996”).
The Secretary shall, after providing adequate notice and an opportunity for a hearing conducted within the affected State, withhold funds from any State that does not utilize the grant or allotment under section 9905 or 9906 of this title in accordance with the provisions of this chapter, including the assurances such State provided under section 9908 of this title.
The Secretary shall respond in an expeditious and speedy manner to complaints of a substantial or serious nature that a State has failed to use funds in accordance with the provisions of this chapter, including the assurances provided by the State under section 9908 of this title. For purposes of this paragraph, a complaint of a failure to meet any one of the assurances provided under section 9908 of this title that constitutes disregarding that assurance shall be considered to be a complaint of a serious nature.
Whenever the Secretary determines that there is a pattern of complaints of failures described in paragraph (2) from any State in any fiscal year, the Secretary shall conduct an investigation of the use of funds received under this chapter by such State in order to ensure compliance with the provisions of this chapter.