# Air Plan Approval; ID, Incorporations by Reference Updates and Rule Revisions
> **Rule** · Final rule. · Published 2018-08-20 · Effective 2018-09-19 · 83 FR 42033
## Document
- **Document number:** 2018-17825
- **Category:** other
- **Federal Register citation:** 83 FR 42033
- **CFR reference:** 40 CFR 52
- **Publication date:** 2018-08-20
- **Effective date:** 2018-09-19
- **EPA docket:** EPA-R10-OAR-2018-0214, FRL-9982-59-Region 10
## Abstract

EPA is taking final action to approve revisions to Idaho's State Implementation Plan (SIP) submitted by the Idaho Department of Environmental Quality (IDEQ) on March 20, 2018 and April 12, 2018. The submitted revisions update incorporation by reference of Federal regulations in the Idaho's rules. The revisions also remove an interim regulation that expired in 2003.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/08/20/2018-17825/air-plan-approval-id-incorporations-by-reference-updates-and-rule-revisions)
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