# Approval and Promulgation of Air Quality Implementation Plans; Maryland; Clarification of Visible Emissions Exception Provisions
> **Rule** · Direct final rule. · Published 2005-04-26 · Effective 2005-06-27 · 70 FR 21337
## Document
- **Document number:** 05-8317
- **Category:** air-emissions
- **Federal Register citation:** 70 FR 21337
- **CFR reference:** 40 CFR 52
- **Publication date:** 2005-04-26
- **Effective date:** 2005-06-27
- **State:** MD
- **EPA docket:** RME-OAR-2005-MD-0002
## Abstract

EPA is taking direct final action to approve revisions to the Maryland State Implementation Plan (SIP). The revision consists of clarifications to the exception provisions of the Maryland visible emissions regulations. EPA is approving these revisions to the Maryland regulations in accordance with the requirements of the Clean Air Act.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/04/26/05-8317/approval-and-promulgation-of-air-quality-implementation-plans-maryland-clarification-of-visible)
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