# Approval and Promulgation of Implementation Plans; Mississippi: Prevention of Significant Deterioration; Nitrogen Oxides as a Precursor to Ozone; Correction
> **Rule** · Final rule; correction and clarification. · Published 2011-01-14 · Effective 2011-01-19 · 76 FR 2589
## Document
- **Document number:** 2011-377
- **Category:** air-emissions
- **Federal Register citation:** 76 FR 2589
- **CFR reference:** 40 CFR 52
- **Publication date:** 2011-01-14
- **Effective date:** 2011-01-19
- **State:** MS
- **EPA docket:** EPA-R04-OAR-2009-0041-201058(c)
## Abstract

EPA is publishing today's notice to correct the regulatory table in the Code of Federal Regulations for Mississippi's state implementation plan (SIP) to clarify that the version of Mississippi's Prevention of Significant Deterioration (PSD) regulations incorporated into Mississippi's SIP on and after the January 19, 2011, effective date of the SIP revision approved by EPA on December 20, 2010, will be the version promulgated by the State on October 28, 2010 (state- effective date December 1, 2010), and approved by EPA on December 29, 2010. This version of Mississippi's PSD regulations includes both a SIP revision approved by EPA on December 20, 2010, and a SIP revision approved by EPA on December 29, 2010. No new SIP revisions are approved by today's notice. Today's notice clarifies that the revision identified in EPA's December 20, 2010, final action (adding nitrogen oxides (NO<INF>X</INF>) as a precursor to ozone for PSD purposes) was included in the PSD rules that were incorporated into the SIP by EPA's December 29, 2010, final action regarding greenhouse gases (GHGs).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2011/01/14/2011-377/approval-and-promulgation-of-implementation-plans-mississippi-prevention-of-significant)
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