# Approval and Promulgation of Air Quality Implementation Plans; Virginia; Revision to Clean Air Interstate Rule Sulfur Dioxide Trading Program
> **Rule** · Final rule. · Published 2010-03-12 · Effective 2010-04-12 · 75 FR 11738
## Document
- **Document number:** 2010-5105
- **Category:** air-emissions
- **Federal Register citation:** 75 FR 11738
- **CFR reference:** 40 CFR 52
- **Publication date:** 2010-03-12
- **Effective date:** 2010-04-12
- **State:** VA
- **EPA docket:** EPA-R03-OAR-2009-0599
## Abstract

EPA is approving a State Implementation Plan (SIP) revision submitted by the Commonwealth of Virginia. The revision pertains to the timing for the first phase of the sulfur dioxide (SO<INF>2</INF>) trading budget under the Commonwealth's approved regulations that implement the requirements of the Clean Air Interstate Rule (CAIR). EPA is approving this revision to change the start date of Virginia's CAIR SO<INF>2</INF> trading budget from the control period in 2009 to the control period in 2010 in accordance with the requirements of the Clean Air Act (CAA).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2010/03/12/2010-5105/approval-and-promulgation-of-air-quality-implementation-plans-virginia-revision-to-clean-air)
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