# Approval and Promulgation of Air Quality Implementation Plans; Maryland; Revisions to Visible Emissions and Sulfur Dioxide Testing Regulations
> **Rule** · Direct final rule. · Published 2003-08-06 · Effective 2003-10-06 · 68 FR 46487
## Document
- **Document number:** 03-19922
- **Category:** air-emissions
- **Federal Register citation:** 68 FR 46487
- **CFR reference:** 40 CFR 52
- **Publication date:** 2003-08-06
- **Effective date:** 2003-10-06
- **State:** MD
- **EPA docket:** MD140-3094a
## Abstract

EPA is taking direct final action to approve revisions to the Maryland State Implementation Plan (SIP). The revision consists of amendments to Maryland's general air quality emission standards, prohibitions and restrictions affecting visible emissions, particulate matter and sulfur compounds from sources other than fuel burning equipment. EPA is approving these revisions in accordance with the requirements of the Clean Air Act.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2003/08/06/03-19922/approval-and-promulgation-of-air-quality-implementation-plans-maryland-revisions-to-visible)
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