# Test Methods and Performance Specifications for Air Emission Sources; Correction
> **Rule** · Correcting amendments. · Published 2021-03-23 · Effective 2021-03-23 · 86 FR 15421
## Document
- **Document number:** 2021-05761
- **Category:** other
- **Federal Register citation:** 86 FR 15421
- **CFR reference:** 40 CFR 60
- **Publication date:** 2021-03-23
- **Effective date:** 2021-03-23
- **EPA docket:** EPA-HQ-OAR-2018-0815
## Abstract

The Environmental Protection Agency (EPA) is correcting a final rule that was published in the Federal Register on October 7, 2020, and was effective on December 7, 2020. The final rule corrected and updated regulations for source testing of emissions. This correction does not change any final action taken by the EPA on October 7, 2020; this action corrects the amendatory instructions for Methods 4 and 5.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/03/23/2021-05761/test-methods-and-performance-specifications-for-air-emission-sources-correction)
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