# Clarifying the Scope of “Applicable Requirements” Under State Operating Permit Programs and the Federal Operating Permit Program

**Action Urgency Score:** 30/100

| Field | Value |
|---|---|
| Agency | Environmental Protection Agency |
| Type | Final rule |
| Action | Final rule. |
| Published | 2026-09-25 |
| Effective | 2026-10-26 |
| Significant | No |
| CFR parts | 40 CFR 70, 40 CFR 71 |
| Summary | The U.S. Environmental Protection Agency (EPA) is updating the title V operating permit program regulations to codify the Agency's existing interpretations and policies concerning when and whether "applicable requirements" established in other Clean Air Act (CAA) programs may be reviewed, modified, and/or implemented through the title V operating permit program. Specifically, this final rule clarifies the limited situations in which requirements under the New Source Review (NSR) preconstruction permitting program would be reviewed using the EPA's title V oversight authorities. Additionally, th |
| Document number | 2026-19671 |

## Why this score
- Final rule.

Source: Federal Register API (Office of the Federal Register) (https://www.federalregister.gov/documents/2026/09/25/2026-19671/clarifying-the-scope-of-applicable-requirements-under-state-operating-permit-programs-and-the). Last refreshed: 2026-11-04T09:17:43.641Z.
Data from the Federal Register API; the published Federal Register document is authoritative. Informational only, not legal advice.