# Federal Register 2026-18040 — effective 2026-10-19 — Cause of Airline Delay and Cancellation Categories Under Section 511(b) of the FAA Reauthorization Act of 2024 — Office of the Secretary

For Federal Register 2026-18040, effective date is 2026-10-19; agency is Office of the Secretary; published is 2026-09-03; cfr parts amended is 14 CFR 234; dates, as printed is This final rule becomes effective on October 19, 2026, recorded from its source on 2026-09-07; source re-checked 2026-09-16.

- **FR document number:** 2026-18040 _(verified: appears in the quote below)_
- **Rule:** Cause of Airline Delay and Cancellation Categories Under Section 511(b) of the FAA Reauthorization Act of 2024 _(verified: appears in the quote below)_
- **Agency:** Office of the Secretary _(verified: appears in the quote below)_
- **Effective date:** 2026-10-19 _(verified: appears in the quote below)_
- **DATES, as printed:** This final rule becomes effective on October 19, 2026. _(verified: appears in the quote below)_
- **CFR parts amended:** 14 CFR 234 _(our reading, not quoted from the source)_
- **Published:** 2026-09-03 _(verified: appears in the quote below)_

## What the source says

> {"document_number":"2026-18040","title":"Cause of Airline Delay and Cancellation Categories Under Section 511(b) of the FAA Reauthorization Act of 2024","agency_names":["Transportation Department","Office of the Secretary"],"effective_on":"2026-10-19","dates":"This final rule becomes effective on October 19, 2026.","cfr_references":[{"chapter":null,"citation_url":null,"part":"234","title":14}],"publication_date":"2026-09-03","html_url":"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"}

## Source

- https://www.federalregister.gov/api/v1/documents.json?per_page=1000&order=oldest&conditions%5Btype%5D%5B%5D=RULE&conditions%5Beffective_date%5D%5Bgte%5D=2026-08-31&conditions%5Beffective_date%5D%5Blte%5D=2026-12-31&fields%5B%5D=document_number&fields%5B%5D=title&fields%5B%5D=agency_names&fields%5B%5D=effective_on&fields%5B%5D=dates&fields%5B%5D=cfr_references&fields%5B%5D=publication_date&fields%5B%5D=html_url

Last verified: 2026-09-16. Review by: 2026-09-29.
Part of [Federal rules taking effect: every US final rule in the Federal Register, by effective date](https://referencesource.org/federal-rules-taking-effect/).