# Approval and Promulgation of Implementation Plans; State of Missouri; General Conformity
> **Rule** · Direct final rule. · Published 2007-12-04 · Effective 2008-02-04 · 72 FR 68072
## Document
- **Document number:** E7-23484
- **Category:** air-emissions
- **Federal Register citation:** 72 FR 68072
- **CFR reference:** 40 CFR 52
- **Publication date:** 2007-12-04
- **Effective date:** 2008-02-04
- **State:** MO
- **EPA docket:** EPA-R07-OAR-2007-1055
## Abstract

EPA is taking direct final action to approve a revision to the Missouri State Implementation Plan (SIP) to amend the General Conformity Rule to include de minimis emission levels for Particulate Matter 2.5 (PM<INF>2.5</INF>). This update ensures consistency with the Federal General Conformity Rule.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2007/12/04/E7-23484/approval-and-promulgation-of-implementation-plans-state-of-missouri-general-conformity)
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