CFR › Title 49 › Part 663Part 663 — Pre-Award and Post-Delivery Audits of Rolling Stock PurchasesSubpart A — General§ 663.1— Purpose.§ 663.3— Scope.§ 663.5— Definitions.§ 663.7— Certification of compliance to FTA.§ 663.9— Audit limitations.§ 663.11— Audit financing.§ 663.13— Buy America requirements.§ 663.15— Compliance.Subpart B — Pre-Award Audits§ 663.21— Pre-award audit requirements.§ 663.23— Description of pre-award audit.§ 663.25— Pre-award Buy America certification.§ 663.27— Pre-award purchaser's requirements certification.Subpart C — Post-Delivery Audits§ 663.31— Post-delivery audit requirements.§ 663.33— Description of post-delivery audit.§ 663.35— Post-delivery Buy America certification.§ 663.37— Post-delivery purchaser's requirements certification.§ 663.39— Post-delivery audit review.Subpart D — Certification of Compliance With or Inapplicability of Federal Motor Vehicle Safety Standards§ 663.41— Certification of compliance with Federal motor vehicle safety standards.§ 663.43— Certification that Federal motor vehicle standards do not apply.