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

**Action Urgency Score:** 55/100

| Field | Value |
|---|---|
| Agency | Transportation Department; Office of the Secretary |
| Type | Final rule |
| Action | Final rule. |
| Published | 2026-09-03 |
| Effective | 2026-10-19 |
| Significant | Yes (EO 12866) |
| CFR parts | 14 CFR 234 |
| Summary | The U.S. Department of Transportation (Department or DOT) is amending its regulations governing how air carriers report the causes of flight cancellations and delays. This action implements Section 511(b) of the FAA Reauthorization Act of 2024, which mandates that ten specific types of events be excluded from the "Air Carrier" causal reporting code. That code is reserved for circumstances that are within the carrier's control. This final rule creates a new reporting category to capture these ten specific events, ensuring that the data reported to the Department and shared with the traveling pu |
| Document number | 2026-18040 |

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

Source: Federal Register API (Office of the Federal Register) (https://www.federalregister.gov/documents/2026/09/03/2026-18040/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.