Resources Resources such as documents, research, data, and other tools related to the activities of the California Air Resources Board are available from this page. Use the following general categories or the search tool below. Resource DirectoriesExecutive OrdersPermits, Certifications, Verifications, and RegistrationsFormsDatabase ApplicationsResearchA-Z indexVapor Recovery Keywords Airborne ToxicsAir PollutionAir Quality PlansBiking & WalkingBusiness AssistanceBusiness AssistanceCars & TrucksCars, Trucks, & MotorcyclesClean CarsClimate ChangeCommunitiesConstruction & Earthmoving EquipmentConsumer ProductsDiesel VehiclesElectricityEnforcementEnvironmental JusticeEnvironmental JusticeFreight & Goods MovementHealthHeavy-Duty EquipmentIndoor Air Quality & Exposure(-)Lawn, Garden & Landscape EquipmentMeasuring Air QualityOceangoing Vessels & Harbor CraftOn-Road Heavy-Duty VehiclesResearchSimple Solutions to Improve Air QualitySustainable CommunitiesTrains & RailyardsTransitTruck & BusVW Diesel Vehicles(-)In-Use Off-Road Diesel-Fueled Fleets RegulationLarge Spark-Ignition (LSI) Engine Fleet Requirements RegulationSmall Off-Road Engines (SORE)Zero-Emission Landscaping EquipmentInformationLink 8 results found for LinkLabel Vendors for Off-Road Diesel Vehicles and Large Spark-Ignited (LSI) Equipment InformationMunicipal Fleets in Low-Population Counties LinkRulemaking Documents LinkOff-Road Diesel Reporting Forms and Enforcement Advisories LinkVerified Retrofits for In-Use Off-Road Diesel Vehicles LinkEmails Sent to DOORS Fleets LinkOff-Road Fleet Average Calculators LinkIn-Use Off-Road Diesel-Fueled Fleets Regulation Language FeaturedTruckStop Diesel Truck InformationDriveClean Buying guide for clean and efficient vehiclesBreathe Well Air quality in your neighborhood