# Approval and Promulgation of Implementation Plans; Infrastructure and Interstate Transport State Implementation Plan for the 2010 Sulfur Dioxide National Ambient Air Quality Standards
> **Rule** · Final rule. · Published 2016-01-11 · Effective 2016-02-10 · 81 FR 1127
## Document
- **Document number:** 2015-33180
- **Category:** air-emissions
- **Federal Register citation:** 81 FR 1127
- **CFR reference:** 40 CFR 52
- **Publication date:** 2016-01-11
- **Effective date:** 2016-02-10
- **EPA docket:** EPA-R06-OAR-2013-0388
## Abstract

The Environmental Protection Agency (EPA) is approving elements of a State Implementation Plan (SIP) submission from the State of Texas for the Sulfur Dioxide (SO<INF>2</INF>) National Ambient Air Quality Standards (NAAQS). The submittal addresses how the existing SIP provides for implementation, maintenance, and enforcement of the 2010 SO<INF>2</INF> NAAQS (infrastructure SIP or i-SIP). This i-SIP ensures that the State's SIP is adequate to meet the state's responsibilities under the Federal Clean Air Act (CAA).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2016/01/11/2015-33180/approval-and-promulgation-of-implementation-plans-infrastructure-and-interstate-transport-state)
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