# Air Plan Approval; California; South Coast Air Quality Management District
> **Rule** · Final rule. · Published 2021-01-15 · Effective 2021-02-16 · 86 FR 3820
## Document
- **Document number:** 2020-28020
- **Category:** air-emissions
- **Federal Register citation:** 86 FR 3820
- **CFR reference:** 40 CFR 52
- **Publication date:** 2021-01-15
- **Effective date:** 2021-02-16
- **State:** CA
- **EPA docket:** EPA-R09-OAR-2019-0176
## Abstract

The Environmental Protection Agency (EPA) is taking final action to approve a revision to the South Coast Air Quality Management District (SCAQMD) portion of the California State Implementation Plan (SIP). This revision concerns emissions of oxides of nitrogen (NO<INF>X</INF>) from on-road heavy-duty vehicles. We are approving a local measure to reduce emissions from these sources under the Clean Air Act (CAA or the Act).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/01/15/2020-28020/air-plan-approval-california-south-coast-air-quality-management-district)
---
*AI Analytics · CC0 1.0*