# New Source Performance Standards; Delegation of Authority to Oklahoma
> **Rule** · Final rule; notification of delegation. · Published 2025-12-18 · Effective 2026-01-20 · 90 FR 59057
## Document
- **Document number:** 2025-23275
- **Category:** enforcement
- **Federal Register citation:** 90 FR 59057
- **CFR reference:** 40 CFR 60
- **Publication date:** 2025-12-18
- **Effective date:** 2026-01-20
- **State:** OK
- **EPA docket:** EPA-R06-OAR-2010-0580
## Abstract

The Environmental Protection Agency (EPA) is approving updates to the Code of Federal Regulations that reflect Oklahoma's current New Source Performance Standards (NSPS) delegation status and the mailing address for the Oklahoma Department of Environmental Quality (ODEQ). The ODEQ submitted updated regulations for receiving delegation of EPA authority for implementation and enforcement of certain NSPS. The updated State regulations incorporate by reference certain NSPS promulgated by EPA, as they existed through June 30, 2023. The delegation of authority for implementation and enforcement applies to sources subject to the delegated NSPS, including those located in certain areas of Indian country as discussed herein.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2025/12/18/2025-23275/new-source-performance-standards-delegation-of-authority-to-oklahoma)
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