# Test Methods and Performance Specifications for Air Emission Sources
> **Rule** · Final rule. · Published 2020-10-07 · Effective 2020-12-07 · 85 FR 63394
## Document
- **Document number:** 2020-18824
- **Category:** other
- **Federal Register citation:** 85 FR 63394
- **CFR reference:** 40 CFR 51
- **Publication date:** 2020-10-07
- **Effective date:** 2020-12-07
- **EPA docket:** EPA-HQ-OAR-2018-0815
## Abstract

This action corrects and updates regulations for source testing of emissions. These revisions include corrections to inaccurate testing provisions, updates to outdated procedures, and approved alternative procedures that will provide flexibility to testers. These revisions will improve the quality of data and will not impose any new substantive requirements on source owners or operators.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/10/07/2020-18824/test-methods-and-performance-specifications-for-air-emission-sources)
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