# Disapproval of State Implementation Plan Revisions; Clark County, Nevada
> **Rule** · Final rule. · Published 2014-03-11 · Effective 2014-04-10 · 79 FR 13564
## Document
- **Document number:** 2014-05106
- **Category:** air-emissions
- **Federal Register citation:** 79 FR 13564
- **CFR reference:** 40 CFR 52
- **Publication date:** 2014-03-11
- **Effective date:** 2014-04-10
- **State:** NV
- **EPA docket:** EPA-R09-OAR-2013-0778
## Abstract

The Environmental Protection Agency (EPA) is finalizing disapproval of revisions to the Clark County portion of the Nevada State Implementation Plan (SIP). This action concerns affirmative defense provisions applicable to violations related to excess emissions from sources during equipment startup, shutdown and malfunction (SSM) events. Under authority of the Clean Air Act (CAA or the Act), this action identifies deficiencies with these provisions preventing EPA's approval of them as SIP revisions.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2014/03/11/2014-05106/disapproval-of-state-implementation-plan-revisions-clark-county-nevada)
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