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Final ruleTook effect March 23, 2026

Parts and Accessories Necessary for Safe Operation; Auxiliary Fuel Tanks

Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register Feb. 19, 2026. Document 2026-03257. Updated Nov. 14, 2026.

What it does

FMCSA amends its fuel tank requirements to add an exception to the prohibition on gravity and syphon feeds for auxiliary pumps with a nominal fuel tank capacity of not more than five gallons mounted on the trailer chassis frame or trailer bed, for purposes other than operation of the motor vehicle, that are operated only when the motor vehicle is not in motion. This revision responds to a petition for rulemaking from the Truck Trailer Manufacturers Association (TTMA). The revision provides relief from a regulatory requirement without impacting safety.

The Federal Motor Carrier Safety Administration's summary, as published in the Federal Register.

What changed in the regulation

1 part of Title 49 of the Code of Federal Regulations:

49 CFR 393

Wording on eCFR: the day before it took effect and from the day it took effect (first part listed).

Compared with

The Federal Motor Carrier Safety Administration has published 21 final rules in 2026 so far, compared with 6 in all of 2025.

Counted by the Tribune from Federal Register records since Jan. 1, 2025.

Before this

1 earlier Federal Register document under regulation identifier 2126-AC94 since Jan. 1, 2025.

What happens next and when

Effective March 23, 2026.

The agency's dates, word for word.

Document number2026-03257
ActionFinal rule.
AgenciesTransportation Department; Federal Motor Carrier Safety Administration
PublishedFeb. 19, 2026
Effective dateMarch 23, 2026
Regulation identifier (RIN)2126-AC94
DocketFMCSA-2025-0120

Source: the Federal Register (public domain). The document in the Federal Register