# Air Quality Implementation Plan; California; Northern Sierra Air Quality Management District; Stationary Source Permits
> **Rule** · Final rule. · Published 2020-11-20 · Effective 2020-12-21 · 85 FR 74263
## Document
- **Document number:** 2020-24926
- **Category:** air-emissions
- **Federal Register citation:** 85 FR 74263
- **CFR reference:** 40 CFR 52
- **Publication date:** 2020-11-20
- **Effective date:** 2020-12-21
- **State:** CA
- **EPA docket:** EPA-R09-OAR-2020-0418
## Abstract

The Environmental Protection Agency (EPA) is finalizing a revision to the Northern Sierra Air Quality Management District (NSAQMD or "District") portion of the California State Implementation Plan (SIP). In this action, we are approving a rule submitted by the NSAQMD that governs the issuance of permits for stationary sources, which focuses on the preconstruction review and permitting of major sources and major modifications under part D of title I of the Clean Air Act (CAA or "the Act").

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/11/20/2020-24926/air-quality-implementation-plan-california-northern-sierra-air-quality-management-district)
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