Home › CFR › Title 49 › Part 66549 CFR Part 665 — Bus TestingSubpart A — General§ 665.1— Purpose.§ 665.3— Scope.§ 665.5— Definitions.§ 665.7— Certification of compliance.Subpart B — Bus Testing Procedures§ 665.11— Testing requirements.§ 665.13— Test report and manufacturer certification.Subpart C — Operations§ 665.21— Scheduling.§ 665.23— Fees.§ 665.25— Transportation of vehicle.§ 665.27— Procedures during testing.