# Approval and Promulgation of Air Quality Implementation Plans; Maryland; Update to Materials Incorporated by Reference
> **Rule** · Final rule; administrative change. · Published 2011-08-22 · Effective 2011-08-22 · 76 FR 52278
## Document
- **Document number:** 2011-21260
- **Category:** air-emissions
- **Federal Register citation:** 76 FR 52278
- **CFR reference:** 40 CFR 52
- **Publication date:** 2011-08-22
- **Effective date:** 2011-08-22
- **State:** MD
- **EPA docket:** MD203-3119
## Abstract

EPA is updating the materials submitted by Maryland that are incorporated by reference (IBR) into the Maryland State Implementation Plan (SIP). The regulations affected by this update have been previously submitted by the Maryland Department of the Environment (MDE) and approved by EPA. This update affects the SIP materials that are available for public inspection at the National Archives and Records Administration (NARA), the Air and Radiation Docket and Information Center located at EPA Headquarters in Washington, DC, and the EPA Regional Office.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2011/08/22/2011-21260/approval-and-promulgation-of-air-quality-implementation-plans-maryland-update-to-materials)
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