# Air Plan Approval; WA; Update to Materials Incorporated by Reference
> **Rule** · Final rule; administrative change. · Published 2021-08-03 · Effective 2021-08-03 · 86 FR 41716
## Document
- **Document number:** 2021-15878
- **Category:** other
- **Federal Register citation:** 86 FR 41716
- **CFR reference:** 40 CFR 52
- **Publication date:** 2021-08-03
- **Effective date:** 2021-08-03
- **EPA docket:** EPA-R10-OAR-2021-0319
## Abstract

The Environmental Protection Agency (EPA) is updating the regulatory materials incorporated by reference into the Washington State Implementation Plan (SIP). The regulations addressed in this action were previously submitted by the Washington Department of Ecology and approved by the EPA in prior rulemakings. This action is an administrative change that updates the SIP materials available for public inspection at the National Archives and Records Administration and the EPA Regional Office.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/08/03/2021-15878/air-plan-approval-wa-update-to-materials-incorporated-by-reference)
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