# Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NSR): Aggregation
> **Rule** · Delay of effective date. · Published 2010-05-18 · Effective 2009-01-15 · 75 FR 27643
## Document
- **Document number:** 2010-11299
- **Category:** other
- **Federal Register citation:** 75 FR 27643
- **CFR reference:** 40 CFR 51
- **Publication date:** 2010-05-18
- **Effective date:** 2009-01-15
- **EPA docket:** EPA-HQ-OAR-2003-0064
## Abstract

EPA is delaying the effective date of the final rule titled "Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NSR): Aggregation" under the authority of the Administrative Procedure Act (APA) section 705 until the proceeding for judicial review of this rule is completed or EPA completes the reconsideration of the rule. This final rule for "aggregation," which EPA published in the Federal Register on January 15, 2009, is subject to a petition for review and has not become effective.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2010/05/18/2010-11299/prevention-of-significant-deterioration-psd-and-nonattainment-new-source-review-nsr-aggregation)
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