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 (-)EnforcementCargo Tank Vapor RecoveryEnforcement Policy & ReportsIndoor Air QualityNew Source Review Permitting Programs(-)Portable Equipment Registration Program (PERP)Protect California Air Act of 2003 - Senate Bill 288Supplemental Environmental Projects (SEPs)Fact SheetForm(-)InformationNoticeResearch 2 results found for Information Portable Equipment Registration Program Five-Day Notification Information Non-road Diesel Engine Certification Tier Chart FeaturedTruckStop Diesel Truck InformationDriveClean Buying guide for clean and efficient vehiclesBreathe Well Air quality in your neighborhood