# Approval of Implementation Plans of South Carolina: Clean Air Interstate Rule
> **Rule** · Direct final rule. · Published 2007-10-09 · Effective 2007-12-10 · 72 FR 57209
## Document
- **Document number:** E7-19646
- **Category:** air-emissions
- **Federal Register citation:** 72 FR 57209
- **CFR reference:** 40 CFR 52
- **Publication date:** 2007-10-09
- **Effective date:** 2007-12-10
- **State:** SC
- **EPA docket:** EPA-R04-OAR-2007-0424-200746(a)
## Abstract

EPA is approving revisions to the South Carolina State Implementation Plan (SIP) submitted on August 14, 2007. These revisions incorporate provisions related to the implementation of EPA's Clean Air Interstate Rule (CAIR), promulgated on May 12, 2005 and subsequently revised on April 28, 2006 and December 13, 2006, and the CAIR Federal Implementation Plans (FIPs) concerning sulfur dioxide (SO<INF>2</INF>), nitrogen oxides (NO<INF>X</INF>) annual, and NO<INF>X</INF> ozone season emissions for the State of South Carolina, promulgated on April 28, 2006 and subsequently revised December 13, 2006. EPA is not making any changes to the CAIR FIPs, but is amending the appropriate appendices in the CAIR FIP trading rules simply to note this approval. On September 19, 2007, South Carolina requested that EPA only act on a portion of the August 14, 2007, submittal as an abbreviated SIP. Consequently, EPA is approving the abbreviated SIP revisions that address the methodology to be used to allocate annual and ozone season NO<INF>X</INF> allowances under the CAIR FIPs as well as opt-in provisions for the SO<INF>2</INF>, NO<INF>X</INF> annual, and NO<INF>X</INF> ozone season trading programs. South Carolina also requested that EPA approve compliance supplement pool (CSP) provisions for the NO<INF>X</INF> annual trading program.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2007/10/09/E7-19646/approval-of-implementation-plans-of-south-carolina-clean-air-interstate-rule)
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