Air Plan Approval; California; Revised Format for Materials Incorporated by Reference

Environmental Protection Agency (EPA).

Final rule; administrative change.

The Environmental Protection Agency (EPA) is revising the format for materials submitted by the State of California that are incorporated by reference into the California State Implementation Plan (SIP). The regulations and other materials affected by this format change have all been previously submitted by the State of California and approved by the EPA. This format revision will primarily affect the “Identification of plan—in part” sections, as well as the format of the SIP materials that will be available for public inspection at the EPA Regional Office and the National Archives and Records Administration (NARA). This action, which only relates to local ordinances and certain local and regional California air district rules, is the second of a series of actions intended to change the format for the entire California SIP.

This rule is effective on June 4, 2025.

The EPA has established a docket for this action under Docket ID No. EPA-R09-OAR-2024-0527. SIP materials which are incorporated by reference into 40 CFR part 52 are available for inspection by appointment at Environmental Protection Agency, Region IX, 75 Hawthorne Street, San Francisco, CA 94105-3901. For information on the availability of this material at the EPA Regional Office, please contact the person in the FOR FURTHER INFORMATION CONTACT section of this document.