Most regulation content online is written for fleet compliance officers who already live in this world. This page is written for a different reader: someone who just bought — or is seriously shopping for — a commercial truck and needs to understand what operating it legally will actually require.
The rules vary by truck weight, how you'll use it, and where you'll operate. The sections below map out what applies to each situation. Browse available trucks on TruckRadar if you haven't bought yet.
What applies to you depends on three things
GVWR is on the door jamb placard. Most Class 6–8 trucks are over 26,001 lbs.
Even occasional interstate trips trigger federal FMCSA requirements.
For-hire carriers need an MC number on top of a USDOT number.
Federal Motor Carrier Safety Administration
A USDOT number is a unique identifier assigned by FMCSA to every company that operates a commercial motor vehicle above certain thresholds. It's how the federal government tracks safety records, inspection history, and compliance status.
You need a USDOT number if you operate in interstate commerce with a vehicle (or combination) with a GVWR over 10,001 lbs. Some states also require one for intrastate operations — check your state DOT's requirements. Hazmat carriers need one regardless of weight or operating area.
Registration is through FMCSA's Unified Registration System. The process takes 10–20 minutes online and the number is active immediately. You must display it on both sides of your vehicle in 2-inch contrasting lettering, and complete a safety audit within the first 18 months of operation.
What you need to do
Register via FMCSA's Unified Registration System before your first interstate trip. Keep your company information current — outdated records can result in enforcement action at the roadside.
Commercial Driver's License
CDL class is determined by the weight and type of vehicle you're operating — not what you're hauling. Three classes cover the commercial vehicle spectrum:
Any combination with a GVWR over 26,001 lbs where the towed vehicle weighs more than 10,001 lbs. Required for most semi trucks pulling loaded trailers.
A single vehicle with GVWR over 26,001 lbs, or towing something under 10,001 lbs. Straight trucks, dump trucks, large box trucks, and most buses.
Vehicles under 26,001 lbs that transport 16+ passengers, or any vehicle designed to carry hazardous materials in quantities requiring placards.
Endorsements are required additions for specific cargo types: H (hazmat — requires TSA background check), N (tank vehicles), T (doubles/triples), P (passengers), S (school bus). Each requires a separate knowledge test; H and P also require a skills test.
What you need to do
Determine which class applies based on your truck's GVWR and any trailer you'll pull. Apply at your state DMV — process includes a knowledge test, vision screening, and skills test. CDL testing is standardized federally but administered by individual states.
For-Hire Carrier Registration
An MC number (Motor Carrier operating authority) is separate from your USDOT number and is specifically required for for-hire carriers — companies that get paid to transport someone else's freight or passengers in interstate commerce.
If you're running a private fleet and hauling your own goods, you need a USDOT number but generally don't need an MC number. If you're an owner-operator taking loads from brokers or load boards, you're a for-hire carrier and need both. Brokers and freight forwarders have their own authority types (MB and FF numbers respectively).
After applying, FMCSA publishes a 10-day protest period. You must also have the required insurance on file (MCS-90 endorsement) before authority becomes active. New entrant carriers operate under provisional authority and are subject to a safety audit within 18 months.
What you need to do
Apply through FMCSA's Unified Registration System. Filing fee is $300 per authority type. Allow 10 business days for the protest period plus insurance processing. Do not dispatch loads until authority is active.
International Registration Plan
IRP (International Registration Plan) is the agreement between US states and Canadian provinces that lets interstate operators register once and legally operate in all member jurisdictions. Instead of buying a separate plate for every state you drive through, you pay a single apportioned fee based on the percentage of miles you operate in each jurisdiction.
IRP applies to commercial vehicles with a GVWR over 26,000 lbs (or combined weight over 26,000 lbs) that operate in two or more IRP member jurisdictions. If your operation is strictly intrastate, you use regular state plates and IRP doesn't apply.
Cost: First-year apportioned registration typically runs $900–$1,700 depending on your base state, fleet size, and mileage distribution. You'll receive cab cards that serve as proof of registration in all member jurisdictions. Annual renewal requires reporting actual miles traveled in each state from the prior year.
What you need to do
Register with your base state's IRP office (the state where you maintain your principal place of business). Bring your title, USDOT number, and mileage estimates by state. Keep your IRP cab card in the truck — enforcement officers check for it at weigh stations.
International Fuel Tax Agreement
IFTA simplifies fuel tax reporting for carriers operating in multiple states. Without it, you'd file separate fuel tax returns in every state you drove through. With IFTA, you file one quarterly report with your base state, which then distributes credits and payments to other jurisdictions based on where you drove and fueled.
Who files: Qualified motor vehicles operating in two or more IFTA jurisdictions. A “qualified motor vehicle” is: (1) a vehicle with two axles and GVWR over 26,000 lbs, (2) a vehicle with three or more axles regardless of weight, or (3) a combination exceeding 26,000 lbs.
Reporting: File quarterly (due Jan 31, Apr 30, Jul 31, Oct 31). Report total miles driven and fuel purchased in each jurisdiction. Your base state calculates the net balance — you either owe additional fuel taxes or receive a credit. Keep fuel receipts for every fill-up; audits go back four years.
Note: Oregon, Kentucky, New Mexico, New York, and Arkansas all have weight-distance taxes that operate separately from IFTA. Operating in any of these states triggers additional filing obligations beyond your IFTA return. See the State Landmines section below.
What you need to do
Register with your base state's IFTA office. You'll receive IFTA decals (two, one per side) and a license to carry in the cab. Set up mileage tracking from day one — ELD data, manual trip logs, or fleet management software all work. Missing quarterly filings result in penalties and can trigger audits.
FMCSA Required Coverage
FMCSA sets minimum liability insurance requirements for interstate for-hire carriers. These are absolute floors — most brokers, shippers, and lenders require significantly more:
| Cargo Type | FMCSA Minimum | Common Broker Requirement |
|---|---|---|
| General freight (non-hazmat) | $750,000 | $1,000,000+ |
| Household goods movers | $750,000 | $1,000,000+ |
| Hazmat (non-bulk oil) | $1,000,000 | $2,000,000+ |
| Hazmat (bulk oil / explosives) | $5,000,000 | Market rate |
| Passengers (16+ seats) | $5,000,000 | Market rate |
What you need to do
Secure a commercial trucking liability policy before your first load. Your insurer files the MCS-90 endorsement directly with FMCSA — you don't submit it separately. Check load board and broker requirements before shopping for coverage — most require $1,000,000 minimum regardless of the federal floor.
Electronic Logging Device Mandate
ELDs replace paper logs for recording hours of service. The mandate applies to most drivers of CMVs subject to HOS regulations — but the exemptions are frequently misunderstood.
ELD exemptions (no device required):
2026 ELD Decertification — April 14 Deadline
FMCSA decertified 9 ELD devices in February 2026. Carriers using any of these devices had until April 14, 2026 to replace them. If you're buying a truck with an existing ELD installed, verify the device model is on FMCSA's current registered devices list. A decertified device is treated the same as having no ELD.
What you need to do
Before purchasing a truck with an existing ELD, look up the device model on FMCSA's registered devices list. If buying a truck that requires an ELD and has none, budget $200–$800 for a certified device plus installation. Subscription fees run $25–$60/month depending on platform.
HOS Rules for Property-Carrying Drivers
HOS rules govern how many hours a commercial driver can be on duty and behind the wheel per duty period. The core rules for property-carrying drivers:
The 60/70-hour rule caps total on-duty time at 60 hours in 7 consecutive days (or 70 hours in 8 days for carriers that operate every day of the week). The clock resets after 34 consecutive hours off duty.
Short-haul exemption: CDL drivers operating within a 100 air-mile radius of their normal work reporting location, who return to that location within 12 hours, can use 11/14-hour rules without an ELD and without keeping a paper log — just record on-duty and off-duty times on time records.
What you need to do
Determine which HOS rules apply based on your operation. If you qualify for short-haul, document your operating radius carefully — enforcement measures air miles from your home terminal, not driving miles. OTR operators: your ELD tracks HOS automatically.
Regulations aren't just a compliance obligation — they're a pre-purchase due diligence tool. These checks can catch problems that aren't visible in photos or odometer readings.
Check the truck's state title history
If the truck was ever titled or registered in California, verify CARB Truck and Bus Regulation compliance. Applies to diesel trucks over 14,000 lbs GVWR. Non-compliant trucks cannot legally operate in CA — which limits where you can run loads and destroys resale value.
Verify any installed ELD is on FMCSA's certified list
FMCSA maintains a current list of registered ELD devices. Nine devices were decertified in February 2026. Don't assume a mounted ELD is a legal ELD — look up the device model before relying on it for HOS compliance.
Confirm the title is free of liens before transfer
Run a lien search in the title state. A truck sold with an undisclosed lien can be repossessed after you buy it. Dealers are required to clear liens at closing; private sales require you to verify independently.
Check FMCSA's SAFER system for VIN inspection history
FMCSA's SAFER system logs roadside inspection results, out-of-service orders, and safety events tied to a vehicle's VIN. A truck with a history of brake violations or repeated out-of-service orders tells you something the seller won't.
Verify engine model year against ELD exemption rules
A pre-2000 engine is fully exempt from the ELD mandate. Confirm the engine model year — not just the truck model year. Some trucks have been re-powered with newer engines. The engine date code is stamped on the block.
Confirm bill of sale fields for your state's title transfer
If buying from an out-of-state dealer, your state may require specific fields on the bill of sale — purchase price, odometer disclosure, dealer license number. A bill of sale that doesn't meet your state's requirements can delay or block title transfer.
When browsing TruckRadar listings, filter by state to identify trucks with California registration history — it's the most common compliance landmine in used commercial truck purchases.
Federal rules are consistent. State rules aren't. These are the jurisdictions with requirements that trip up buyers and new operators who don't know to look for them.
California's Truck and Bus Regulation phases out older diesel engines based on model year. Diesel trucks over 14,000 lbs GVWR operating in CA — including out-of-state trucks making deliveries — must meet the phase-in schedule. Non-compliant trucks face fines and cannot legally operate in the state. If you ever run a CA route, verify compliance before buying.
New York enforces stricter weight limits on certain state routes compared to federal standards. The NY Thruway requires commercial vehicle permits for overweight moves. New York also has its own Highway Use Tax (HUT) — a weight-distance tax for vehicles over 18,000 lbs — separate from IFTA, requiring its own registration and quarterly filing.
Oregon replaces IFTA fuel tax with a Weight-Distance Tax for vehicles over 26,000 lbs. Instead of paying fuel tax at the pump and filing IFTA, OR carriers pay a per-mile charge based on vehicle weight. You must register for an Oregon Weight-Distance Tax account before your first trip into the state. There is no opt-out.
Kentucky assesses a Highway Use License Tax based on weight and mileage traveled within the state, on top of IFTA. Carriers operating vehicles over 59,999 lbs through Kentucky must register and file quarterly returns with the Kentucky Transportation Cabinet. Failure to file results in back taxes plus significant penalties.
New Mexico has a Weight Distance Tax on commercial vehicles over 26,000 lbs operating within the state. Carriers must obtain a New Mexico Weight Distance Tax ID before entering and file quarterly returns. NM enforces this at ports of entry on the I-25 and I-40 corridors.
Arkansas assesses a ton-mileage tax on heavy vehicles operating in the state. Carriers operating loads over 73,280 lbs through Arkansas — primarily on I-40 and I-30 — should verify their filing obligations. It's a smaller-scale weight-distance obligation compared to OR/NM/KY/NY, but it catches many operators by surprise.
Cross-border operations require additional authority. For Canada: a FAST card speeds border crossings; PAPS (Pre-Arrival Processing System) handles US-bound Canadian shipments. For Mexico: PARS for northbound loads, separate Mexican authority for operating south of the border. Both countries have CVSA inspection programs that can mirror US out-of-service consequences.
The regulatory calendar moves continuously. These are the changes that directly affect buyers and new operators in 2026.
ELD Device Decertifications
FMCSA removed 9 ELD devices from the certified list. Carriers operating any of these devices had until April 14, 2026 to replace them. Post-deadline, a decertified device is equivalent to operating with no ELD.
Non-Domiciled CDL Restrictions
FMCSA finalized new rules for non-domiciled CDL applications. H-2A, H-2B, and E-2 visa holders may still apply for CDLs. Employment Authorization Documents (EADs) are no longer accepted for non-domiciled CDL applications.
Oral Fluid Drug Testing
FMCSA authorized oral fluid (saliva) as a DOT drug testing specimen type. Implementation is pending final certification of collection and laboratory procedures. Once active, carriers can choose oral fluid as an alternative to urine testing.
Fentanyl Added to DOT Drug Test Panel
FMCSA published a proposed rule adding fentanyl and norfentanyl to the standard DOT five-panel drug test. The rule is not yet final or in effect as of April 2026.
Autonomous Truck Regulatory Framework
FMCSA has a proposed rulemaking target of May 2026 for an autonomous truck regulatory framework covering ADS-equipped CMVs without a human driver. Commercial impact is still years out, but the framework will define how ADS trucks are treated under existing HOS, insurance, and operating authority rules.
Last updated: April 2026. This section is maintained by the TruckRadar team.
No — you can purchase a commercial truck without a CDL. But to operate it legally on public roads above certain weight thresholds, you will need the appropriate CDL class. A single vehicle with a GVWR over 26,001 lbs requires at minimum a Class B CDL. If you're pulling a trailer that pushes the combination over 26,001 lbs and the towed vehicle is over 10,001 lbs, you need a Class A.
A USDOT number identifies your company in FMCSA's safety database and is required once you operate a commercial motor vehicle above the GVW threshold. An MC number (operating authority) is specifically for for-hire carriers — companies that haul freight or passengers in exchange for compensation. If you're running a private fleet and hauling your own goods, you need a USDOT number but typically not an MC number. If you're getting paid to haul someone else's freight, you need both.
No. Apportioned (IRP) plates are for vehicles operating in multiple states or Canadian provinces. If your operation is genuinely limited to one state, you register normally with that state. However, even occasional out-of-state trips can trigger the IRP requirement — some states interpret 'interstate operation' broadly. Check with your state DOT if you're unsure.
A lapsed USDOT number on the previous owner's record doesn't directly affect the truck's title or your ability to purchase it. Each operator registers their own USDOT number tied to their company, not the vehicle. If you need a USDOT number for your operation, you'll register your own through FMCSA. The concern with a lapsed DOT is what it may reveal about the previous owner's operation — check FMCSA's SAFER system for any safety flags on the vehicle's inspection history by VIN.
Possibly. Trucks with engines manufactured before model year 2000 are fully ELD-exempt — the engine ECM predates the communication standard required for ELD connectivity. Short-haul CDL drivers (operating within a 100 air-mile radius and returning to their starting location within 12 hours) can use time records instead of a full ELD. Drivers using paper logs for 8 or fewer days in any 30-day period are also exempt. The vehicle's engine model year is the clearest bright-line test.
California's Air Resources Board (CARB) Truck and Bus Regulation applies to diesel trucks with a GVWR over 14,000 lbs that operate in California — including out-of-state trucks making deliveries. If you ever drive your truck into California, CARB applies to you. The regulation phases in requirements by engine/truck model year, generally requiring newer engines or particulate filters. Trucks with older engines that don't meet the phase-in schedule are effectively prohibited from operating in CA. If you're buying a used truck with California title history, verify its CARB status before assuming it can operate there.
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