---
kind: "unit"
title: "49"
title_heading: "Transportation"
key: "subtA/part71"
level: "part"
label: "Part 71"
heading: "Standard Time Zone Boundaries"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/49/subtA-part71"
sections_count: 14
---

# Part 71 — Standard Time Zone Boundaries

Title 49 C.F.R. — Transportation › Subtitle A — Office of the Secretary of Transportation

## Sections

- [§71.1. Limits defined; exceptions authorized for certain rail operating purposes only.](/cfr/49/71.1.md)
- [§71.2. Annual advancement of standard time.](/cfr/49/71.2.md)
- [§71.3. Atlantic zone.](/cfr/49/71.3.md)
- [§71.4. Eastern zone.](/cfr/49/71.4.md)
- [§71.5. Boundary line between eastern and central zones.](/cfr/49/71.5.md)
- [§71.6. Central zone.](/cfr/49/71.6.md)
- [§71.7. Boundary line between central and mountain zones.](/cfr/49/71.7.md)
- [§71.8. Mountain zone.](/cfr/49/71.8.md)
- [§71.9. Boundary line between mountain and Pacific zones.](/cfr/49/71.9.md)
- [§71.10. Pacific zone.](/cfr/49/71.10.md)
- [§71.11. Alaska zone.](/cfr/49/71.11.md)
- [§71.12. Hawaii-Aleutian zone.](/cfr/49/71.12.md)
- [§71.13. Samoa zone.](/cfr/49/71.13.md)
- [§71.14. Chamorro Zone.](/cfr/49/71.14.md)