Two distinct requirements: the ongoing file, and the annual inspection
Federal rules under 49 CFR Part 396 require every commercial motor vehicle to be systematically inspected, repaired, and maintained, with specific records kept documenting that work.
Two distinct pieces sit at the center of this: an ongoing maintenance file for each vehicle (§396.3), and a periodic inspection performed at least once every 12 months (§396.17) — commonly called the "annual DOT inspection." Each serves a different purpose, and each has its own recordkeeping and retention requirements.
Whether the recordkeeping duty technically belongs to you or to a carrier you're leased to, having your own copies organized means you're never caught without proof at a roadside stop or during a DQF review.
A state sticker alone may not satisfy the federal requirement
One of the most common and costly misunderstandings in trucking: a state vehicle inspection sticker does not automatically satisfy the federal annual inspection requirement. It only counts if FMCSA has specifically determined that state's program meets the federal minimum standard found in Appendix G to Subchapter B of the FMCSRs. Assuming a state sticker covers you — especially when crossing state lines — is a real and avoidable risk.
It's also worth knowing that a clean roadside inspection doesn't substitute for the annual inspection either. FMCSA guidance is explicit that a violation-free roadside inspection cannot be used to satisfy the §396.17 periodic inspection requirement, even if the vehicle passed with zero issues.
If you're leased to a carrier, the recordkeeping duty technically belongs to that "motor carrier" — but since you own and operate your own equipment, carriers commonly expect you to keep and produce these records yourself, and you're the one standing at the scale house when an officer asks for them.
What the rules actually require
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Annual (periodic) inspection is required at least once every 12 months for every CMV — including each segment of a combination vehicle separately (tractor, trailer, and dolly each need their own inspection), meeting the standards in Appendix G to Subchapter B.
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A state inspection program only satisfies the federal requirement if FMCSA has specifically determined that program is "as effective as" §396.17 — don't assume a state sticker alone covers you, especially across state lines.
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A violation-free roadside inspection does not substitute for the annual inspection, per FMCSA's own published guidance.
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Annual inspection report retention: 14 months from the report date, kept on the vehicle or at the principal place of business.
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Ongoing maintenance records (§396.3) must include: vehicle identification (make, VIN, year, tire size), a schedule showing the nature and due date of upcoming maintenance, and a record of the date and nature of repairs actually performed.
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General maintenance record retention: 1 year while the vehicle is under the carrier's control, plus 6 months after it leaves that control.
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Driver Vehicle Inspection Reports (DVIRs) are only required when a defect is found. Property-carrying CMV drivers have never been required to file a "no-defect" report, though a carrier may still choose to require one as its own policy.
Go straight to the source
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