New Definition of Tank Vehicle Will Affect CDL Endorsement Requirement - Heavy Duty Trucking
FMCSA has revised the definition of a tank vehicle for CDL endorsement purposes, potentially expanding the types of vehicles requiring a tank endorsement.
Aforeworn detected this change in the Trucking / FMCSA Compliance space on July 13, 2026 and published this briefing so affected operators are forewarned rather than caught off guard. It is rated High urgency. Drivers and carriers operating vehicles that transport liquids or gases in bulk, including those previously not classified as tank vehicles. should confirm how it applies to their specific situation before acting. There is a time constraint attached: Effective 60 days from publication in Federal Register; enforcement begins on that date.. Acting after that point can mean penalties, a lapsed licence, or lost eligibility — exactly the kind of surprise Aforeworn exists to prevent. Aforeworn monitors Trucking / FMCSA Compliance continuously and turns every detected change into a plain-English briefing like this one, so you always know first. Forewarned is forearmed.
What changed
The definition of 'tank vehicle' now includes vehicles with a permanently mounted tank of 1,000 gallons or more, or that transport liquids or gases in bulk in portable tanks exceeding 119 gallons, even if not permanently attached.
Who it affects
Drivers and carriers operating vehicles that transport liquids or gases in bulk, including those previously not classified as tank vehicles.
What you must do
Review current fleet vehicles and driver endorsements to ensure compliance with the new definition; obtain tank vehicle endorsements where needed.
Deadline
Effective 60 days from publication in Federal Register; enforcement begins on that date.
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