49 CFR § 238.423 - Fuel tanks.

---
identifier: "/us/cfr/t49/s238.423"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 238.423 - Fuel tanks."
title_number: 49
title_name: "Transportation"
section_number: "238.423"
section_name: "Fuel tanks."
chapter_name: "FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
part_number: "238"
part_name: "PASSENGER EQUIPMENT SAFETY STANDARDS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 20103, 20107, 20133, 20141, 20302-20303, 20306, 20701-20702, 21301-21302, 21304; 28 U.S.C. 2461 note; and 49 CFR 1.89."
regulatory_source: "64 FR 25660, May 12, 1999, unless otherwise noted."
cfr_part: "238"
---


# 238.423 Fuel tanks.

(a) *External fuel tanks.* Each type of external fuel tank must be approved by FRA's Associate Administrator for Safety upon a showing that the fuel tank provides a level of safety at least equivalent to a fuel tank that complies with the external fuel tank requirements in § 238.223(a).

(b) *Internal fuel tanks.* Internal fuel tanks shall comply with the requirements specified in § 238.223(b).