CDL licenses are governed by federal minimum standards, but each state sets its own rules on testing, medical certification, and renewal

A Commercial Driver's License (CDL) is required to operate vehicles over a certain weight or carrying specific cargo — but the law that governs it is split between federal requirements and state administration. The federal government sets the floor through the Commercial Motor Vehicle Safety Act and regulations in 49 CFR Part 383, but your state's Department of Motor Vehicles (or equivalent) decides how to test you, what medical standards you must meet, how often you renew, and what disqualifications explore. This means two drivers in different states can face different renewal timelines, different medical exam requirements, and different penalties for the same violation.

Understanding which rules are federal (the same everywhere) and which are state-specific (different where you live) is the first step to staying compliant. Federal rules cover what classes of CDL exist, what endorsements are available, what disqualifications are permanent, and what medical conditions require a waiver. State rules cover the written and skills tests, the medical examiner network, the fee structure, and how violations are recorded and enforced.

Key Takeaways

  • Federal law requires all CDL holders to pass a written test on vehicle operation and safety, a pre-trip inspection test, and a road skills test, but your state designs and administers these tests.
  • Medical certification through a Federal Motor Carrier Safety Administration (FMCSA) certified medical examiner is required before you can drive, and the certificate must be renewed every 24 months (or less if your state or a waiver requires it).
  • Certain criminal convictions, traffic violations, and medical conditions result in permanent or temporary disqualification from holding a CDL, and these rules are federal — your state cannot override them.
  • Each state sets its own CDL renewal period (typically 4 or 8 years), its own fees, and its own rules for how violations in one state are reported to your home state.
  • If you hold a CDL in one state and move to another, you must obtain a CDL from your new state of residence within a set timeframe, usually 30 to 60 days.

Federal Requirements That explore Everywhere

The federal government requires every CDL holder to pass three tests before operating a commercial vehicle: a written knowledge test, a pre-trip vehicle inspection test, and a behind-the-wheel road skills test. The written test covers vehicle operation, cargo securement, hazardous materials (if you hold a hazmat endorsement), and safety procedures. The pre-trip test requires you to walk around and inspect a vehicle, identifying working and broken components. The road skills test is conducted by an examiner in an actual commercial vehicle on public roads or a closed course.

Federal law also mandates that you obtain a medical certificate from an FMCSA-certified medical examiner before you can legally drive. This certificate confirms you meet vision, hearing, blood pressure, and other health standards set by the FMCSA. The certificate is valid for 24 months from the date of the exam, though some states or individual waivers may require renewal sooner. You must carry this certificate in your vehicle or have it on file with your state DMV.

Certain convictions and violations trigger federal disqualification. A conviction for driving under the influence, fleeing police, using a vehicle to commit a felony, or causing a fatality while driving results in permanent disqualification. Other violations — such as reckless driving, improper lane changes, or speeding 15 mph or more over the limit — result in disqualification for one year (or three years if the violation occurred in a commercial vehicle). These rules explore in every state; your state cannot issue you a CDL if you fall under a federal disqualification.

What Each State Controls

Your state designs the written and skills tests, sets the passing score, and determines how often you must renew your CDL. Some states renew every 4 years, others every 8 years. Some charge $50 for a renewal, others charge $200 or more. Some states allow you to renew by mail or online if you have no violations; others require you to appear in person and retake the written test at each renewal. These differences mean your renewal experience in one state may be completely different from another.

States also maintain their own medical examiner networks and set their own rules for which examiners are certified. The FMCSA provides the national standards, but your state's transportation department approves which doctors and clinics can perform the exams. If you move states, you may need to find a new medical examiner in your new state, and the exam itself may cost different amounts depending on where you live.

Each state also decides how to record and report violations. If you receive a traffic ticket in one state while holding a CDL from another, the ticketing state reports it to your home state's DMV. However, the severity of the violation and the penalty may differ between states. A violation that results in a one-year disqualification in one state might result in a three-year disqualification in another, depending on how that state classifies the offense.

Medical Certification and the FMCSA Certificate

The FMCSA medical certificate is not optional — you cannot legally operate a commercial vehicle without one. You must schedule an exam with a certified medical examiner (usually a doctor, nurse practitioner, or physician assistant) who is listed on the FMCSA's National Registry of Certified Medical Examiners. The exam covers your vision (at least 20/40 in each eye, corrected or uncorrected), hearing, blood pressure, diabetes status, and use of certain medications. If you have a condition that does not meet the standard — such as high blood pressure or insulin-dependent diabetes — you may still obtain a certificate if you receive a waiver from the FMCSA.

The certificate is valid for 24 months from the date of the exam. Your state DMV will record the date the certificate expires, and you cannot renew your CDL after that date without a new medical certificate. Some states require you to renew the medical certificate before renewing the CDL; others allow you to renew the CDL and then submit the new medical certificate within a grace period. Check your state's rules before your certificate expires.

If you fail the medical exam or are denied a certificate, you have the right to request a reconsideration or appeal. The process varies by state, but typically involves submitting additional medical documentation or requesting a second opinion from another certified examiner. During this time, you cannot legally drive a commercial vehicle.

Disqualifications and How Long They Last

Federal law lists specific violations that result in disqualification. Permanent disqualifications include conviction for driving under the influence, leaving the scene of an accident, using a vehicle to commit a felony, causing a fatality while driving, or refusing a drug or alcohol test. Once you are permanently disqualified, you cannot hold a CDL in any state, and the disqualification cannot be waived or reduced.

Temporary disqualifications last one year or three years depending on the violation and whether it occurred in a commercial vehicle. Violations that trigger a one-year disqualification include reckless driving, improper lane changes, following too closely, and speeding 10 to 15 mph over the limit. Violations that trigger a three-year disqualification include speeding 15 mph or more over the limit, driving without a valid CDL, and driving a commercial vehicle without the required endorsement. A second violation within a 10-year period extends the disqualification to three years.

Your state may impose additional disqualifications beyond the federal minimum. Some states disqualify you for violations like driving with a suspended license or accumulating too many points on your driving record. If you are disqualified in one state, that disqualification is reported to the Commercial Driver's License Information System (CDLIS), a national database that all states can access. You cannot straightforward move to another state and obtain a new CDL to avoid a disqualification.

Renewal, Transfer, and Changing States

If you move to a new state, you must obtain a CDL from that state within a set timeframe — typically 30 to 60 days after establishing residency. You cannot hold a valid CDL from two states at the same time. To obtain a CDL in your new state, you must pass that state's written and skills tests, obtain a new medical certificate (or transfer your existing one if it is still valid), and pay the new state's fees. Your previous CDL becomes invalid once you receive the new one.

When you renew your CDL in your home state, you must do so before the expiration date printed on your license. Some states allow online or mail renewal if you have no violations; others require you to appear in person. You will need to renew your medical certificate before or at the same time as your CDL renewal, depending on your state's rules. If your medical certificate expires before your CDL, you cannot legally drive until you obtain a new certificate.

If you are disqualified or suspended, you cannot renew your CDL until the disqualification period ends. Some states allow you to explore for reinstatement after the disqualification period expires; others require you to retake the written and skills tests. Check your state's specific rules on reinstatement procedures.

Violations, Points, and Out-of-State Tickets

Traffic violations committed while driving a commercial vehicle are reported to the CDLIS and to your home state's DMV. A violation in one state is recorded in your home state's system, and your home state may impose additional penalties or points on your record. Some states use a point system where accumulating a certain number of points results in suspension or revocation of your CDL. Other states use a violation-based system where specific violations trigger automatic suspension.

If you receive a ticket while driving a commercial vehicle in a state other than your home state, you are responsible for reporting it to your home state's DMV within a set timeframe (often 30 days). Failure to report can result in additional penalties. The ticketing state will also report the violation to CDLIS, so your home state will eventually learn about it even if you do not report it yourself.

Certain violations are considered "serious" under federal law and count toward disqualification. Serious violations include speeding 15 mph or more over the limit, reckless driving, improper lane changes, following too closely, and driving without a valid CDL or required endorsement. Two serious violations within a 3-year period result in a 60-day disqualification; three serious violations within a 3-year period result in a 120-day disqualification.

Endorsements and Hazmat Certification

CDL endorsements allow you to operate specialized vehicles or transport specific cargo. Common endorsements include Hazmat (hazardous materials), Passenger (buses), Tank (tanker vehicles), and Doubles/Triples (multiple trailers). Each endorsement requires passing an additional written test and, in some cases, a skills test. Hazmat endorsement also requires a federal background check and security clearance.

Hazmat endorsement is subject to additional federal security requirements. You must pass a Transportation Security Administration (TSA) background check, which includes fingerprinting and a review of your criminal history, immigration status, and mental health records. The TSA can deny or revoke Hazmat endorsement on security grounds, separate from any CDL disqualification. Hazmat endorsement is valid for the same period as your CDL but can be renewed independently if your CDL is still valid.

If you lose your CDL due to disqualification, any endorsements you hold are also suspended or revoked. When you are reinstated, you must reapply for endorsements and pass the required tests again.

Frequently Asked Questions

What happens if my medical certificate expires before my CDL?

You cannot legally operate a commercial vehicle once your medical certificate expires, even if your CDL is still valid. You must obtain a new medical certificate from a certified examiner before you can drive. Some states allow you to renew the certificate and submit it to the DMV within a grace period; others require the new certificate before you can renew your CDL. Check your state's rules to avoid a gap in your certification.

Can I hold a CDL in two states at the same time?

No. Federal law prohibits holding a valid CDL from more than one state. If you move to a new state, you must obtain a CDL from that state within 30 to 60 days and surrender your previous CDL. Holding multiple CDLs is a federal violation and can result in permanent disqualification.

Do I have to retake the written and skills tests when I renew my CDL?

It depends on your state. Some states require you to retake both tests at each renewal; others waive the tests if you have no violations. A few states allow online or mail renewal without testing. Check your state's DMV website or contact them directly to learn your state's renewal requirements.

What if I am disqualified in one state — can I get a CDL in another state?

No. Disqualifications are reported to the CDLIS, a national database that all states access. If you are disqualified in one state, you cannot obtain a CDL in any other state until the disqualification period ends. Attempting to do so is a federal violation.

How long does a Hazmat endorsement last?

Hazmat endorsement is valid for the same period as your CDL — typically 4 or 8 years depending on your state. You must renew it at the same time you renew your CDL by passing the Hazmat written test and passing the TSA background check again. If your Hazmat endorsement expires before your CDL, you can renew it independently without renewing your entire CDL.