# Approval and Promulgation of Implementation Plans; State of Missouri
> **Rule** · Direct final rule. · Published 2003-03-18 · Effective 2003-05-19 · 68 FR 12827
## Document
- **Document number:** 03-6309
- **Category:** other
- **Federal Register citation:** 68 FR 12827
- **CFR reference:** 40 CFR 52
- **Publication date:** 2003-03-18
- **Effective date:** 2003-05-19
- **State:** MO
- **EPA docket:** MO 171-1171a
## Abstract

EPA is announcing it is approving a revision to the Missouri State Implementation Plan (SIP) which pertains to the rescission of two outdated opacity rules for the Kansas City and St. Louis areas and the revision of the state-wide opacity rule. Approval of this revision will simplify the SIP, ensure consistency between the state and federally- approved rules, and ensure Federal enforceability of the revised state rule.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2003/03/18/03-6309/approval-and-promulgation-of-implementation-plans-state-of-missouri)
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