# Approval and Promulgation of Maintenance Plan Revisions; Michigan
> **Rule** · Direct final rule. · Published 2005-01-28 · Effective 2005-03-29 · 70 FR 4019
## Document
- **Document number:** 05-1633
- **Category:** air-emissions
- **Federal Register citation:** 70 FR 4019
- **CFR reference:** 40 CFR 52
- **Publication date:** 2005-01-28
- **Effective date:** 2005-03-29
- **State:** MI
- **EPA docket:** R05-OAR-2004-MI-0003
## Abstract

The Environmental Protection Agency (EPA) is approving a December 19, 2003 request from Michigan for a State Implementation Plan (SIP) revision of the Southeast Michigan carbon monoxide (CO) maintenance plan. The CO maintenance plan revision establishes a new on-road emissions inventory for the years 1996 and 2010. The revision also establishes a new transportation conformity motor vehicle emissions budget (MVEB) for the year 2010. The emission inventory and MVEB updates are designed to maintain the National Ambient Air Quality Standards (NAAQS) for CO as required by the Clean Air Act (CAA).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/01/28/05-1633/approval-and-promulgation-of-maintenance-plan-revisions-michigan)
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