40 CFR 86.129-80 : Protection Of Environment (§ 1.1 To Parts 1851-1899) — (§ 82.1 To Appendix Xii To Part 86) — Environmental Protection Agency (Continued) (§ 82.1 To Appendix Xii To Part 86) — Air Programs (Continued) (§ 82.1 To Appendix Xii To Part 86) — Control Of Emissions From New And In-Use Highway Vehicles And Engines (§ 86.1 To Appendix Xii To Part 86) — Emission Regulations For 1977 And Later Model Year New Light-Duty Vehicles And New Light-Duty Trucks And New Otto-Cycle Complete Heavy-Duty Vehicles; Test Procedures (§ 86.101 To § 86.166-12) — Road load power, test weight, and inertia weight class determination.