California Air Resources Board

Implementation Guidance

• June 2023 Guidance to Vehicle Owners on Upcoming Requirements (Issued June 30, 2023)

2024 Periodic Testing

• Guidance to Vehicle Owners on 2024 Periodic Testing Requirements for Vehicles Subject to Semiannual Testing (Issued August 23, 2023)

• Guidance to Vehicle Owners on 2024 Periodic Testing Requirements for Vehicles Subject to Annual Testing: California Registered Motorhomes and Agricultural Vehicles (Issued August 23, 2023)

Database Reporting

• Database Reporting Requirements

Notice of Regulatory Effective Date

• Notice of Effective Dates for Sections 2196.1(f), 2196.8, 2197, and 2197.2(b), of the Heavy-Duty Inspection and Maintenance Program Regulation