Chapter 3.6 - Periodic Smoke Inspections of Heavy-Duty Diesel-Powered VehiclesBrowse as ListSearch WithinSection 2190 - Vehicles Subject to the Periodic Smoke Inspection RequirementsSection 2191 - DefinitionsSection 2192 - Vehicle Inspection ResponsibilitiesSection 2193 - Smoke Opacity Standards, Inspection Intervals, and Test ProceduresSection 2194 - Record Keeping Requirements