# Approval and Promulgation of State Implementation Plans; CaliforniaSouth Coast
> **Rule** · Final rule. · Published 1999-07-23 · Effective 1999-08-23 · 64 FR 39923
## Document
- **Document number:** 99-18719
- **Category:** air-emissions
- **Federal Register citation:** 64 FR 39923
- **CFR reference:** 40 CFR 52
- **Publication date:** 1999-07-23
- **Effective date:** 1999-08-23
- **State:** CA
- **EPA docket:** CA-227-151
## Abstract

EPA is concluding the Public Consultative Process (PCP) on mobile source emission reductions needed for attainment of the 1-hour ozone national ambient air quality standard (NAAQS) in the Los Angeles- South Coast Air Basin Area (South Coast). EPA is also approving the State's update to the state implementation plan (SIP) for ozone in the South Coast to reflect the outcome of this process and the implementation status of some of the control measures. Finally, EPA is approving the State's joint commitment with EPA to issue regulations to eliminate the remaining SIP shortfall as determined appropriate for each agency. EPA is taking these actions under provisions of the Clean Air Act (CAA) regarding EPA action on SIP submittals, SIPs for NAAQS, and plan requirements for nonattainment areas.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/07/23/99-18719/approval-and-promulgation-of-state-implementation-plans-californiasouth-coast)
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