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DOT/FMCSA RIN: 2126-AC94 Publication ID: Spring 2025 
Title: ●Parts and Accessories Necessary for Safe Operation; Auxiliary Fuel Tanks 
Abstract:

FMCSA proposes to add an exception to the prohibition on gravity and syphon feeds for auxiliary pumps with a fuel tank capacity of less than 5 gallons mounted on the trailer chassis frame or trailer bed, for purposes other than operation of the motor vehicle, that are operational only when the motor vehicle is not in motion. This proposal is in response to a petition for rulemaking from the Truck Trailer Manufacturers Association. The proposed change would provide relief from a regulatory requirement without impacting safety.

 
Agency: Department of Transportation(DOT)  Priority: Substantive, Nonsignificant 
RIN Status: First time published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
EO 14192 Designation: Deregulatory 
CFR Citation: 49 CFR 393   
Legal Authority: Not Yet Determined   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  05/30/2025  90 FR 22934   
NPRM Comment Period End  07/29/2025 
Final Rule  12/00/2025 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Wendy Liberante
Department of Transportation
Federal Motor Carrier Safety Administration
1200 New Jersey Avenue SE,
Washington, DC 20590
Phone:202 366-2551
Email: wendy.liberante@dot.gov