# Approval and Promulgation of Implementation Plans: NC: Approval of Revisions to the Control of Visible Emissions Rule
> **Rule** · Final rule · Published 2005-10-25 · Effective 2005-11-25 · 70 FR 61556
## Document
- **Document number:** 05-21261
- **Category:** other
- **Federal Register citation:** 70 FR 61556
- **CFR reference:** 40 CFR 52
- **Publication date:** 2005-10-25
- **Effective date:** 2005-11-25
- **EPA docket:** R04-OAR-2005-NC-0001-200503, FRL-7988-2
## Abstract

EPA is taking final action to approve the Control of Visible Emissions portion of a State Implementation Plan (SIP) revision submitted to EPA, by the State of North Carolina, on December 14, 2004. EPA is approving changes to the opacity standards for sources required to install, operate and maintain continuous opacity monitoring systems (COMs). These changes do not increase the number of exceptions or the number of minutes per day for exceptions, but allow the aggregation of the daily exceptions. At this time, we are not taking final action on the remaining portions of the SIP revision submitted by the State on December 14, 2004.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/10/25/05-21261/approval-and-promulgation-of-implementation-plans-nc-approval-of-revisions-to-the-control-of-visible)
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