# Federal Register 2026-20847 — effective 2026-12-24 — Amendment of United States Area Navigation (RNAV) Route T-437; Eastern United States — Federal Aviation Administration

For Federal Register 2026-20847, effective date is 2026-12-24; agency is Federal Aviation Administration; published is 2026-10-13; cfr parts amended is 14 CFR 71, recorded from its source on 2026-10-12; source re-checked 2026-11-03.

- **FR document number:** 2026-20847 _(verified: appears in the quote below)_
- **Rule:** Amendment of United States Area Navigation (RNAV) Route T-437; Eastern United States _(verified: appears in the quote below)_
- **Agency:** Federal Aviation Administration _(verified: appears in the quote below)_
- **Effective date:** 2026-12-24 _(verified: appears in the quote below)_
- **DATES, as printed:** Effective date 0901 UTC, December 24, 2026. The Director of the Federal Register approves this incorporation by reference action under 1 CFR part 51, subject to the annual revision of FAA Order JO 7400.11 and publication of conforming amendments. _(verified: appears in the quote below)_
- **CFR parts amended:** 14 CFR 71 _(our reading, not quoted from the source)_
- **Published:** 2026-10-13 _(verified: appears in the quote below)_

## What the source says

> {"document_number":"2026-20847","title":"Amendment of United States Area Navigation (RNAV) Route T-437; Eastern United States","agency_names":["Transportation Department","Federal Aviation Administration"],"effective_on":"2026-12-24","dates":"Effective date 0901 UTC, December 24, 2026. The Director of the Federal Register approves this incorporation by reference action under 1 CFR part 51, subject to the annual revision of FAA Order JO 7400.11 and publication of conforming amendments.","cfr_references":[{"chapter":null,"citation_url":null,"part":"71","title":14}],"publication_date":"2026-10-13","html_url":"https://www.federalregister.gov/documents/2026/10/13/2026-20847/amendment-of-united-states-area-navigation-rnav-route-t-437-eastern-united-states"}

## 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: 2026-11-03. Review by: 2026-11-16.
Part of [Federal rules taking effect: every US final rule in the Federal Register, by effective date](https://referencesource.org/federal-rules-taking-effect/).