# Cause of Airline Delay and Cancellation Categories Under Section 511(b) of the FAA Reauthorization Act of 2024; Delay of Effective Date

**Action Urgency Score:** 70/100

| Field | Value |
|---|---|
| Agency | Transportation Department; Office of the Secretary |
| Type | Final rule |
| Action | Final rule; delay of effective date. |
| Published | 2026-10-15 |
| Effective | 2027-02-01 |
| Significant | Yes (EO 12866) |
| CFR parts | 14 CFR 234 |
| Summary | The U.S. Department of Transportation (Department or DOT) is delaying the effective date of its September 3, 2026 final rule, titled "Cause of Airline Delay and Cancellation Categories under Section 511(b) of the FAA Reauthorization Act of 2024," until February 1, 2027. |
| Document number | 2026-21058 |

## Why this score
- Upcoming deadline.
- Significant rule under EO 12866.
- Final rule.

Source: Federal Register API (Office of the Federal Register) (https://www.federalregister.gov/documents/2026/10/15/2026-21058/cause-of-airline-delay-and-cancellation-categories-under-section-511b-of-the-faa-reauthorization-act). Last refreshed: 2026-11-04T21:40:49.974Z.
Data from the Federal Register API; the published Federal Register document is authoritative. Informational only, not legal advice.