# Approval and Promulgation of Air Quality Implementation Plans; Commonwealth of Pennsylvania; Enhanced Motor Vehicle Inspection and Maintenance Program
> **Rule** · Interim final rule. · Published 1997-01-28 · Effective 1997-02-27 · 62 FR 4004
## Document
- **Document number:** 97-1846
- **Category:** air-emissions
- **Federal Register citation:** 62 FR 4004
- **CFR reference:** 40 CFR 52
- **Publication date:** 1997-01-28
- **Effective date:** 1997-02-27
- **State:** PA
- **EPA docket:** PA 091-4050
## Abstract

EPA is granting conditional interim approval of a State Implementation Plan (SIP) revision submitted by Pennsylvania. This revision establishes and requires the implementation of an enhanced inspection and maintenance (I/M) program in twenty-five Pennsylvania counties. The intended effect of this action is to conditionally approve the Commonwealth's proposed enhanced I/M program for an interim period to last 18 months, based upon the Commonwealth's good faith estimate of the program's performance. This action is being taken under section 110 of the Clean Air Act and section 348 of the National Highway Systems Designation Act.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1997/01/28/97-1846/approval-and-promulgation-of-air-quality-implementation-plans-commonwealth-of-pennsylvania-enhanced)
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