# Approval and Promulgation of Implementation Plans; State of Missouri
> **Rule** · Direct final rule. · Published 2011-03-01 · Effective 2011-05-02 · 76 FR 11083
## Document
- **Document number:** 2011-4368
- **Category:** air-emissions
- **Federal Register citation:** 76 FR 11083
- **CFR reference:** 40 CFR 52
- **Publication date:** 2011-03-01
- **Effective date:** 2011-05-02
- **State:** MO
- **EPA docket:** EPA-R07-OAR-2010-0168
## Abstract

EPA is taking direct final action to approve revisions to the Missouri State Implementation Plan (SIP) submitted April 10, 2009. The revision includes two new rules which implement restrictions on the idling of heavy duty diesel vehicles in the Kansas City Metropolitan Area and in the St. Louis Ozone Nonattainment Area. EPA is approving this revision because the standards and requirements set by the rules will strengthen the Missouri SIP. EPA's approval of this SIP revision is being done in accordance with the requirements of the Clean Air Act (CAA).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2011/03/01/2011-4368/approval-and-promulgation-of-implementation-plans-state-of-missouri)
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