# Approval and Promulgation of Implementation Plans; State of Missouri
> **Rule** · Direct final rule. · Published 2006-11-06 · Effective 2007-01-05 · 71 FR 64888
## Document
- **Document number:** E6-18567
- **Category:** air-emissions
- **Federal Register citation:** 71 FR 64888
- **CFR reference:** 40 CFR 52
- **Publication date:** 2006-11-06
- **Effective date:** 2007-01-05
- **State:** MO
- **EPA docket:** EPA-R07-OAR-2006-0837
## Abstract

EPA is taking direct final action to approve a revision to the State Implementation Plan (SIP) revision submitted by the State of Missouri to add a test method for compliance testing to the rule that will reduce emissions of nitrogen oxides (NO<INF>X</INF>) of major sources in the St. Louis ozone nonattainment area.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/11/06/E6-18567/approval-and-promulgation-of-implementation-plans-state-of-missouri)
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