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Public Notice: Final Approval of California Air Plan Revision; Mobile Source Regulations

Publish Date: 05/18/2018


EPA is taking final action to approve a submittal by the State of California (“State”) to revise its State Implementation Plan (SIP). The submittal consists of State regulations establishing standards and other requirements relating to the control of emissions from certain new and in-use on-road and off-road vehicles and engines. EPA is approving the SIP revision because the regulations meet the applicable requirements of the Clean Air Act. Approval of these regulations as part of the California SIP makes them federally enforceable.


This rule is effective on June 18, 2018.


EPA has established a docket for this action under Docket ID No. EPA-R09-OAR-2017-0620. All documents in the docket are listed on the website. Although listed in the index, some information is not publicly available, e.g., Confidential Business Information (CBI) or other information whose disclosure is restricted by statute. Certain other material, such as copyrighted material, is not placed on the internet and will be publicly available only in hard copy form. Publicly available docket materials are available through, or please contact the person identified in the FOR FURTHER INFORMATION CONTACT section for additional availability information.

For Further Information Contact

John Ungvarsky (, EPA Region IX, (415) 972-3963

Applicant or Respondent

State of California

Docket Number: 

Federal Register Citation: