49 CFR § 663.9 - Audit limitations.
---
identifier: "/us/cfr/t49/s663.9"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 663.9 - Audit limitations."
title_number: 49
title_name: "Transportation"
section_number: "663.9"
section_name: "Audit limitations."
chapter_name: "FEDERAL TRANSIT ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
part_number: "663"
part_name: "PRE-AWARD AND POST-DELIVERY AUDITS OF ROLLING STOCK PURCHASES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 1608(j); 23 U.S.C. 103(e)(f); Pub. L. 96-184, 93 Stat. 1320; Pub. L. 101-551, 104 Stat. 2733; sec. 3023(m), Pub. L. 109-59; 49 CFR 1.51."
regulatory_source: "56 FR 48395, Sept. 24, 1991, unless otherwise noted."
cfr_part: "663"
---
# 663.9 Audit limitations.
(a) An audit under this part is limited to verifying compliance with
(1) Applicable Buy America requirements [section 165 of the Surface Transportation Assistance Act of 1982, as amended,]; and
(2) Solicitation specification requirements of the recipient.
(b) An audit under this part includes, where appropriate, a copy of a manufacturer's self certification information that the vehicle complies with Federal Motor Vehicle Safety Standards or a certification that such standards are inapplicable.
(c) An audit conducted under this part is separate from the single annual audit requirement established by Office of Management and Budget Circular A-128, “Audits of State and Local Governments,” dated May 16, 1985.