; and (C) a rolling stock vehicle that has been certified by the Secretary remains certified until the manufacturer makes a material change to the vehicle, or adjusts the price of the vehicle, that reduces, by more than half, the percentage of domestic content above 70 percent. (2) Certification of percentage The Secretary may, at the request of a component or subcomponent manufacturer, certify the percentage of domestic content and final assembly for a component or subcomponent. (3) Freedom of information act In carrying out this subsection, the Secretary shall consistently apply the provisions of section 552 of title 5, including subsection (b)(4) of such section. (4) Noncompliance The Secretary shall prohibit recipients from procuring rolling stock, components, or subcomponents from a supplier that intentionally provides false information to comply with this subsection. (n) Scope The requirements of this section apply to all contracts for a public transportation project carried out within the scope of the applicable finding, determination, or decision under the National Environmental Policy Act of 1969 ( 42 U.S.C. 4321 et seq.), regardless of the funding source of such contracts, if at least one contract for the public transportation project is funded with amounts made available to carry out this chapter. (o) Buy America conformity The Secretary shall ensure that all Federal funds for commuter rail projects shall comply with this section and shall not be subject to section 22905(a). (p) Audits and reporting of waste, fraud, and abuse (1) In general The Inspector General of the Department of Transportation shall conduct an annual audit on certifications under subsection (m). (2) Report fraud, waste, and abuse The Secretary shall display a Report Fraud, Waste, and Abuse button and link to Department of Transportation’s Office of Inspector General Hotline on the Federal Transit Administration’s Buy America landing page. (3) Contract requirement The Secretary shall require all recipients who enter into contracts