1.4 Medical Self-Certification Categories, Other CDL Rules, and the International Registration Plan
Key Takeaways
- Every CDL and CLP applicant must self-certify to one of four commerce categories — Non-Excepted Interstate (NI), Excepted Interstate (EI), Non-Excepted Intrastate (NA), or Excepted Intrastate (EA) — and only the non-excepted categories require a medical examiner's certificate on file with the state.
- Since June 23, 2025, certified medical examiners transmit CDL/CLP exam results electronically to the FMCSA National Registry by midnight of the next calendar day, and the National Registry forwards them to the State Driver Licensing Agency for posting to the CDLIS driver record.
- A driver who lets a required medical certification lapse becomes "not-certified" on the CDLIS record and the state downgrades or removes the CDL privilege.
- A CDL holder may hold only one driver license; violating the one-license rule can bring a fine of up to $5,000 or jail, as can driving a CMV without a CDL.
- Interstate CMVs must generally be registered under the International Registration Plan (IRP) and licensed under the International Fuel Tax Agreement (IFTA), which cover the 48 contiguous states and 10 Canadian provinces.
Medical Self-Certification, Other CDL Rules, and IRP/IFTA
Before a state driver licensing agency (SDLA) can issue a commercial learner's permit or a commercial driver's license, it has to know which medical standard applies to you. That answer depends entirely on the kind of commerce you drive in. The knowledge test treats this as a licensing-rules item, and candidates lose points on it constantly because they confuse interstate with long distance and excepted with exempt from everything.
1. Interstate vs. Intrastate Commerce
The first question is geographic and economic, not about mileage. You operate in interstate commerce when you drive a commercial motor vehicle:
- From one state into another state or a foreign country;
- Between two points inside one state, but part of the trip crosses into another state or a foreign country; or
- Between two points inside one state when the cargo or passengers are part of a trip that began in, or will end in, another state or a foreign country.
That third bullet is the trap. A drayage driver who never leaves the state line still operates in interstate commerce if the freight came off an ocean vessel bound for a warehouse three states away. Intrastate commerce is everything else — the vehicle, the cargo, and the passengers all stay inside one state for the entire commercial journey.
2. Excepted vs. Non-Excepted Status
Once you know whether you are interstate or intrastate, you must decide whether your driving is non-excepted (the ordinary case) or excepted. Excepted operations are a narrow list of activities that federal or state rules exempt from the physical-qualification requirements. Federal examples of excepted interstate work include school bus operation, federal/state/local government operation, firefighting and other emergency response, custom harvesting, transporting bees or migrant workers, certain farm-supply movements during planting and harvest, non-business private transportation of personal property, and transporting a human corpse or a sick or injured person.
Being excepted does not mean you are exempt from the CDL itself, from hours-of-service rules, or from the drug and alcohol regulations. It only means the medical certificate is not the licensing gate.
3. The Four Self-Certification Categories
On the CDL application you check exactly one box. The four categories, and what each one demands, are:
| Code | Category | Who selects it | Medical certificate required at the SDLA? |
|---|---|---|---|
| NI | Non-Excepted Interstate | The default for most commercial drivers hauling freight or passengers across state lines or in the interstate stream of commerce | Yes — must meet and maintain 49 CFR § 391.41 physical qualifications |
| EI | Excepted Interstate | Interstate drivers engaged only in the listed excepted activities | No federal medical certificate required for licensing |
| NA | Non-Excepted Intrastate | Drivers operating only within one state under that state's medical standards | Yes — the state's medical standard applies |
| EA | Excepted Intrastate | Intrastate drivers engaged only in activities the state excepts | No state medical certificate required for licensing |
If you drive in more than one category, self-certify to the most demanding one that applies — in practice, NI. Changing what you haul may require you to re-certify with the SDLA before the change takes effect.
4. What Happens When the Medical Certificate Lapses
If you are required to hold a certified medical status and you fail to keep the certificate current, your CDLIS driver record flips to "not-certified" and the state begins a downgrade: the commercial privilege is removed from your license, usually with advance written notice. Driving a CMV after a downgrade is driving without a CDL. Recovering the privilege means passing a new DOT physical and, depending on the state and how long the lapse ran, paying reinstatement fees or re-testing.
5. Electronic Medical Certification (Compliance Date June 23, 2025)
The Medical Examiner's Certification Integration rule changed how the certificate reaches your license record. Since the June 23, 2025 compliance date:
- The certified medical examiner uploads the results of your DOT physical — including restrictions and variances — to the FMCSA National Registry by midnight local time of the next calendar day.
- FMCSA transmits that record electronically to your SDLA, which posts it to your CDLIS driver record.
- CDL and CLP holders no longer submit the paper certificate to the SDLA themselves, and motor carriers no longer have to verify the examiner's National Registry credentials for those drivers.
- You may still receive a paper copy on request, but for CDL/CLP holders the electronic CDLIS record is the official proof of certification.
FMCSA has acknowledged that some states had not implemented the receiving system by the compliance date; drivers licensed in a non-compliant state continue to use paper certificates until that state comes online. Exam framing: the certificate itself is still valid for a maximum of 24 months, and shorter certifications remain common. What changed is the delivery path, not the medical standard.
6. Other Federal CDL Rules Every Driver Must Know
These rules apply no matter what class of vehicle you were driving at the time — including your personal car.
- One license only. You may not hold more than one driver license. A court may fine you up to $5,000 or jail you, keep your home-state license, and return the others.
- Notify your employer within 30 days of a conviction for any traffic violation except parking.
- Notify your licensing agency within 30 days if you are convicted of any traffic violation except parking in another jurisdiction.
- Notify your employer within 2 business days if your license is suspended, revoked, or canceled, or if you are disqualified from driving.
- Provide a 10-year employment history of all driving jobs when you apply for a commercial driving job.
- No one may drive a CMV without a CDL. A court may fine you up to $5,000 or jail you.
Notice the asymmetry the test likes to probe: convictions get 30 days, but losing your license gets 2 business days. The shorter clock attaches to the more urgent safety event.
7. The International Registration Plan and IFTA
If you operate a CDL-required vehicle in interstate commerce, the vehicle (not the driver) must, with few exceptions, be registered under the International Registration Plan (IRP) and licensed under the International Fuel Tax Agreement (IFTA). Both programs cover the 48 contiguous United States and 10 Canadian provinces, and both exist to distribute registration fees and fuel taxes fairly among the jurisdictions a truck actually travels through.
Under IRP, jurisdictions register apportioned vehicles — issuing an apportioned license plate and a cab card listing the jurisdictions and weights the vehicle is registered for — then calculate, collect, distribute, and audit the fees. The registrant's duties are to apply in the base jurisdiction, supply documentation, pay the apportioned fees, display the credentials properly, maintain accurate distance records, and make those records available for audit.
IFTA works the same way for fuel: the carrier licenses in one base jurisdiction, receives IFTA decals and a license, and files a single consolidated return reporting miles traveled and fuel purchased in each member jurisdiction. As the driver, your part is mechanical but non-negotiable — keep the cab card and IFTA license in the vehicle and record distance and fuel purchases accurately, because an audit of sloppy trip records lands on the carrier as assessed tax plus penalties.
A driver hauls containers only between the Port of Savannah and a warehouse 40 miles away, never leaving Georgia. The containers arrived by ship from overseas and continue to customers in three other states. Which self-certification category fits this work?
Under the electronic medical certification process that took effect on June 23, 2025, how do a CDL holder's DOT physical results reach the state driver licensing agency?
A CDL holder's license is suspended on a Monday following a conviction in another state. What are the two federal notification deadlines that apply?