# Approval and Promulgation of Implementation Plans; Illinois; Revised Motor Vehicle Emissions Inventories and Motor Vehicle Emissions Budgets Using MOBILE6
> **Rule** · Direct final rule. · Published 2003-09-15 · Effective 2003-11-14 · 68 FR 53887
## Document
- **Document number:** 03-23268
- **Category:** air-emissions
- **Federal Register citation:** 68 FR 53887
- **CFR reference:** 40 CFR 52
- **Publication date:** 2003-09-15
- **Effective date:** 2003-11-14
- **State:** IL
- **EPA docket:** IL 200-3a
## Abstract

EPA is approving a revision dated April 11, 2003, to the Illinois State Implementation Plan (SIP) for the attainment of the 1- hour national ambient air quality standard (NAAQS) for ozone. Specifically, EPA is approving Illinois' revised 2005 and 2007 motor vehicle emission inventories and 2005 and 2007 Motor Vehicle Emissions Budgets (MVEB) recalculated using MOBILE6 for the Chicago severe 1-hour ozone nonattainment area.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2003/09/15/03-23268/approval-and-promulgation-of-implementation-plans-illinois-revised-motor-vehicle-emissions)
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