The short answer: if you haul freight for money and any part of the work crosses State lines, you are non-excepted interstate, category (i) of 49 CFR 383.71(b)(1), and you must hold a current medical examiner's certificate under 49 CFR 391.45. That covers the overwhelming majority of commercial drivers. The other three boxes exist for narrow, specifically listed operations, and ticking one of them because it looks like less paperwork is how drivers lose the CDL privilege.
The second thing to know is that the plumbing changed on June 23, 2025. Your medical examiner no longer hands a CDL holder a paper card to walk into the DMV. The exam result travels electronically from the examiner to FMCSA and from FMCSA to your State driver licensing agency, which posts it on your CDLIS driver record. The self-certification, however, still comes from you. Nobody files it on your behalf, and nothing about the electronic pipeline updates it when your work changes.
This is a breakdown of the rules as written, not employment advice and not medical advice. Every fact below is tied to the current text at eCFR or to FMCSA's own National Registry materials.
Self-certification is a statement you make to your State driver licensing agency about the type of driving you do or expect to do. It is not a test, not a medical opinion, and not something the DMV decides for you. You declare it, the State records it on your commercial driver record, and enforcement and employers read it from there.
It appears in three places in Part 383:
It comes back around at every life event of the license: on renewal under 383.71(d)(1), on an upgrade under 383.71(e)(1), and on a transfer to a new State of domicile under 383.71(c), which the rule requires you to complete within no more than 30 days after establishing the new domicile. A driver who moves from New York to New Jersey and lets it slide for two months has a problem that has nothing to do with medicine.
One clarification that saves a lot of confusion: self-certification is a CDL and CLP concept. A driver operating a commercial motor vehicle that does not require a CDL still has to be medically qualified under Part 391 if the operation is subject to it, but there is no self-certification box at the DMV for that driver, because the mechanism runs through the commercial license record.
Take the rule text apart word by word, because each word is doing work.
383.71(b)(1)(i) says a person must certify that he or she operates or expects to operate in interstate commerce, is both subject to and meets the qualification requirements under 49 CFR Part 391, and is required to obtain a medical examiner's certificate by 391.45.
If you own a trucking company, run under your own MC and USDOT numbers, and move general freight, this is your category and there is nothing to think about. The interesting questions all start when a driver believes an exception applies.
This is the table to read before you touch the form. The last column reflects the rules as they run in 2026, after the National Registry II compliance date, which the next section unpacks.
| Category | Who this actually is | Medical examiner's certificate required? | What reaches the State |
|---|---|---|---|
| Non-excepted interstate 383.71(b)(1)(i) |
Anyone operating or expecting to operate in interstate commerce who is subject to and meets Part 391. For-hire freight, owner-operators, company drivers, car haulers, reefer, flatbed, box trucks over the CDL threshold running across State lines. | Yes. Required by 391.45. Maximum 24 months, shorter for the cases in 391.45(c), (e) and (f). | Your self-certification, filed by you. The medical exam result arrives separately and electronically from FMCSA, and the State posts a status of certified on the CDLIS driver record under 383.71(h)(1)(ii) and 383.71(h)(3)(ii). |
| Excepted interstate 383.71(b)(1)(ii) |
Interstate commerce, but engaging exclusively in transportation excepted under 390.3(f), 391.2, 391.68 or 398.3. School bus operations, transportation performed by Federal, State or local government, transportation of human corpses or sick and injured persons, fire trucks and rescue vehicles in emergency operations, custom-harvesting and beekeeping operations, certain farm vehicle drivers, covered farm vehicles, pipeline welding trucks. | No, and the rule says so directly: therefore not required to obtain a medical examiner's certificate by 391.45. | Your self-certification only. Nothing medical is expected, so nothing medical arrives, and the record does not go to not-certified for want of a card. |
| Non-excepted intrastate 383.71(b)(1)(iii) |
A driver who operates only in intrastate commerce and is therefore subject to State driver qualification requirements. Local construction, in-State delivery, municipal and utility work that never touches interstate movement. | Whatever the State requires. The federal 391.45 duty does not attach through this box. Most States run their own medical rules for intrastate drivers, often mirroring the federal standard with State-level waiver programs. | Your self-certification, plus whatever medical documentation your own State demands under its intrastate rules. This varies State to State and is a question for your licensing agency, not for FMCSA. |
| Excepted intrastate 383.71(b)(1)(iv) |
Intrastate commerce, and engaging exclusively in operations excepted from all or parts of the State driver qualification requirements. The narrowest of the four, and entirely defined by State law. | Per State law. Federal Part 391 is not the source of the requirement here. | Your self-certification only, subject to what your State allows in this category. Some States handle it differently from others. |
This is the box that gets ticked by mistake most often, usually because the word excepted reads like exempt from the medical exam to a driver who does not want to take one. The rule does not work that way. Excepted interstate is defined by what the operation is, not by what the driver would prefer, and the qualifying operations are on closed lists you can read for yourself.
The four cited sources are these:
Read that list again and notice what is not on it. Hauling freight for a broker. Pulling a reefer for a produce shipper. Moving cars on an auto transporter. Running a box truck at 26,001 pounds between Brooklyn and Philadelphia. Relay runs for a large retailer's network. None of it is excepted, in any reading, ever.
One more line of the text that gets skipped: the exceptions in 391.2(a) through (c), custom harvesting, beekeeping and certain farm vehicle drivers, are each written as the rules in this part, except for 391.15(e) and (f), do not apply. The disqualification rules in those two paragraphs keep running even for an operation that is otherwise outside Part 391. And 391.2(c) does not cover a farm vehicle driver operating an articulated combination vehicle, which is where a lot of self-declared farm exceptions actually fail.
Every wrong self-certification we have had to unwind started as one of these four sentences.
The intrastate boxes hand the question over to your State. 383.71(b)(1)(iii) is not a statement that no medical rules apply; it is a statement that State driver qualification requirements apply instead of the federal ones. Three practical consequences follow.
For non-excepted interstate driving, yes, always. The intervals are in 391.45 and they are not all 24 months.
| Situation | Re-examination interval | Source |
|---|---|---|
| Never medically examined and certified | Before operating | 391.45(a) |
| Standard case | Not examined and certified during the preceding 24 months | 391.45(b) |
| Driver authorized only within an exempt intracity zone under 391.62 | 12 months | 391.45(c) |
| Diabetes mellitus treated with insulin, certified under 391.46 | 12 months | 391.45(e) |
| Alternative vision standard, certified under 391.44 | 12 months | 391.45(f) |
| Ability to perform normal duties impaired by physical or mental injury or disease | Re-examination required, no fixed interval | 391.45(g) |
| On or after June 23, 2025, found by a medical examiner not to be physically qualified under 391.43(g)(3) | Re-examination required before driving again | 391.45(h) |
That last row is newer than most drivers realize and it deserves a sentence of its own. Under 391.43(g)(3), on or after June 23, 2025, when a medical examiner finds a person not physically qualified, the examiner must tell the person so and tell them the result will be reported to FMCSA, and all medical examiner's certificates previously issued to that person are no longer valid. The old card in the glovebox with eight months left on it stops meaning anything the moment a later exam comes back unqualified. Shopping for a second opinion after a failed exam does not reset that: the failed result is already in the system.
There is also an in-between state that few drivers are told about. Under 391.43(g)(4), in force since December 22, 2015, the examiner may hold the determination when he needs more records or a further examination. He must then tell you that the additional information has to be provided, or the further examination completed, within 45 days, and that the pending status of the examination will be reported to FMCSA. Practically: if your cardiologist, endocrinologist or sleep clinic takes three weeks to release a letter, you are not burning vague time, you are burning 45 days on a clock that has already started. Bring the specialist paperwork to the exam rather than after it.
This is the part where old advice on forums is actively wrong, so here is the current sequence with dates.
The rule is the Medical Examiner's Certification Integration final rule, published in 2015 and known operationally as National Registry II, or NRII. It was published at 80 FR 22790 on April 23, 2015, its compliance date was pushed back more than once, most recently on June 22, 2021, and it landed on June 23, 2025. From that date the process runs like this:
Two things you no longer do: a CLP applicant or CDL holder no longer submits the paper certificate to the State, and a motor carrier no longer has to verify that the certificate was issued by an examiner listed on the National Registry for those drivers. The electronic record is the official proof.
| What it governs | The date or number | Where it comes from |
|---|---|---|
| National Registry II compliance date for electronic transmission to the States | June 23, 2025 | 383.71(h), 391.41(a)(2)(i)(B), 383.73(o) |
| Forms MCSA-5875 (examination report) and MCSA-5876 (certificate) required of examiners | Since June 22, 2015 | FMCSA, NRII Learning Center |
| Examiner's deadline to report an exam result to FMCSA on Form MCSA-5850 | Midnight local time of the next calendar day, since June 22, 2018 | 391.43(g)(5)(i)(B) |
| Deadline to provide additional information when the examiner delays the determination | 45 days | 391.43(g)(4) |
| Temporary FMCSA exemption letting a paper certificate serve as proof of certification | Up to 60 days after issuance, in effect April 11, 2026 through October 11, 2026 | FMCSA, Docket FMCSA-2026-0265 |
| States listed as not having implemented National Registry II | Alaska and Louisiana on September 2, 2026; the April 2026 exemption notice named five | FMCSA, NRII Learning Center |
| State posts a status of not-certified after the certificate or variance expires | Within 10 calendar days | 383.73(o)(2)(ii) |
| State posts medical variance information received from FMCSA | Within 1 business day | 383.73(o)(3)(ii) |
| Downgrade completed and recorded after status becomes not-certified | Within 60 days | 383.73(o)(4)(i)(B) |
| State retention of the electronic medical certificate record | 3 years beyond the date the certificate was issued | 383.73(o)(1)(ii)(D) |
| Minimum disqualification for falsifying a required certification | At least 60 consecutive days | 383.73(j) |
| Deadline to re-certify after moving to a new State of domicile | Within 30 days of establishing domicile | 383.71(c) |
The transition is not finished, and that is the honest 2026 picture. The 15-day paper allowance that everybody remembers expired on June 22, 2025 together with the old text of 391.41(a)(2)(i)(A), 391.41(a)(2)(ii) and 391.51(b)(6)(ii). What replaced it is a chain of temporary relief, and the exact chain matters because the current link has an end date:
Two conditions are written into the exemption and both are easy to fail. It does not apply to a driver who does not have on his person a copy of a current, valid certificate issued by a certified medical examiner within the prior 60 days, and it does not apply to a motor carrier that does not hold such a copy. A certificate that is 90 days old is outside the relief even while the exemption is live. FMCSA also wrote the sentence that decides how you should plan: the Agency does not anticipate granting additional, nationwide NRII waivers or exemptions after these six months. Read that as a date. From October 12, 2026, unless FMCSA says otherwise, the electronic record is the proof and the paper copy is only a troubleshooting tool.
It depends entirely on whether you hold a CDL or CLP.
And a rule worth memorizing because it settles arguments at roadside and in audits: under 391.41(a)(2)(iv), and again in 383.71(h)(4) and 383.73(o)(6), in the event of a conflict between the medical certification information provided electronically by FMCSA and a paper copy of the certificate, the electronic information controls. The paper in your hand loses to the record on the system.
Failure arrives from two directions at once, and they are independent of each other.
Direction one: you are not qualified for the work you are doing. A driver certified as excepted or intrastate who runs a non-excepted interstate load is operating without the medical qualification that operation requires under 391.41 and 391.45. That is a driver qualification finding, it lands on the carrier as well as the driver, and it sits inside the Driver Fitness area that an investigator reviews. The carrier cannot say it did not know, because the CDLIS driver record it is required to pull shows the self-certification and the medical status side by side.
Direction two: the certification itself was false. 49 CFR 383.73(j) is blunt. If a State determines, when checking an applicant's record before issuing a CLP or CDL or at any time after it is issued, that the applicant falsified information in any of the certifications required by 383.71(b) or (g), the State must at a minimum disqualify the CLP or CDL or the pending application, or disqualify the person from operating a commercial motor vehicle, for a period of at least 60 consecutive days. That is a floor written into the federal standard, not a maximum, and it is not a fine you settle. It is your license.
You file it again with your State driver licensing agency. There is no federal form for this, because the certification lives in State licensing systems. The practical sequence, in order:
| Life event | What you file | Deadline | Rule |
|---|---|---|---|
| Applying for a first CLP | The certification in 383.71(b)(1) | Before the permit is issued | 383.71(a)(9) |
| Applying for a first CDL | The same certification, one of the four boxes | Before the license is issued | 383.71(b)(1) |
| Already holding a CLP or CDL | The same certification, to the State | Standing duty, not a one-time act | 383.71(g) |
| Renewing the CDL | The certifications in 383.71(b)(1) and (b)(5) | At renewal | 383.71(d)(1) |
| Upgrading a class or adding an endorsement | The certifications in 383.71(b) | At upgrade | 383.71(e)(1) |
| Moving to a new State of domicile | The certification again, plus surrender of the old CDL and proof of domicile | Within 30 days of establishing domicile | 383.71(c) |
| Switching up to non-excepted interstate | DOT physical first, then the new certification | Before the first interstate load | 383.71(b)(1)(i), 391.45 |
| Keeping the status of certified | Be re-examined and certified before the current certificate expires | The duty sits on the driver, not the State | 383.71(h)(3)(ii) |
Timing detail worth knowing: 383.71(h)(3)(ii) puts the obligation to maintain the status of certified on the driver. Being certified once does not mean being certified. The clock is yours to watch, and the State is only obliged to mark you not-certified within 10 calendar days of expiry, not to warn you in advance of it.
Here is where the driver's category becomes the company's paperwork. 49 CFR 391.51(b)(6) sets it out:
And the duty that closes the loop on this article: under 49 CFR 391.23(m)(2)(i), since January 30, 2015, the carrier must use the CDLIS motor vehicle record from the current licensing State to verify and document in the driver qualification file the type of operation the driver self-certified under 383.71(b)(1), before letting him operate a CMV. That paragraph has no end date. The self-certification is not a DMV formality the company can ignore; it is a line the company is federally required to read and keep.
Two more mechanics matter. The verification note about the examiner being listed on the National Registry, required by 391.23(m)(2)(ii)(A) and filed under 391.51(b)(8)(ii), applied to CDL drivers through June 22, 2025; for drivers not required to have a CDL the note under 391.23(m)(1) is still required. And retention: under 391.51(c) the qualification file is kept for as long as the driver is employed and three years thereafter, while 391.51(d) lets specific items, including the medical certificate or the CDLIS record obtained in its place, come out of the file three years after execution.
The full anatomy of the folder, and the order an investigator opens it in, is in the DQ file audit checklist. The two other documents most often missing next to the medical page are covered in the previous employer safety performance history and the road test and its accepted equivalents.
Because the self-certification is the hinge that decides which rulebook applies to the driver, and therefore which documents must exist in the file. Get the hinge wrong and every downstream document is arguably wrong.
Sitting with a six-month file, an investigator can line up three items in about a minute:
When the third item contradicts the first, the conversation stops being about medicine. A file that shows interstate movement behind an intrastate or excepted certification is the kind of finding that expands an audit rather than closing one, because it invites the question of what else was declared for convenience.
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They come from 49 CFR 383.71(b)(1). Non-excepted interstate (i): interstate commerce, subject to and meeting Part 391, required to hold a medical examiner's certificate under 391.45. Excepted interstate (ii): interstate commerce but exclusively in operations excepted under 390.3(f), 391.2, 391.68 or 398.3, therefore no certificate required by 391.45. Non-excepted intrastate (iii): only intrastate commerce, subject to State driver qualification requirements. Excepted intrastate (iv): intrastate commerce, exclusively in operations excepted from all or parts of the State requirements.
It is the default answer for commercial freight. You operate or expect to operate in interstate commerce, you are subject to and meet 49 CFR Part 391, and you must obtain a medical examiner's certificate under 391.45. Non-excepted means no listed exception covers your operation. Freight that begins or ends outside the State keeps you in interstate commerce even when the truck itself stays local.
If freight crosses State lines or continues in interstate movement, you are interstate. Then check whether your operation is on the closed lists in 390.3(f), 391.2, 391.68 or 398.3, which cover school buses, government transportation, corpses and sick or injured persons, emergency fire and rescue, custom harvesting, beekeeping, certain farm vehicles and covered farm vehicles. Commercial trucking is not on those lists, so a normal driver or owner-operator picks non-excepted interstate.
In States that have implemented National Registry II, no. Since June 23, 2025 the examiner reports the result electronically to FMCSA, FMCSA sends it to the State licensing agency, and the agency posts a status of certified on the CDLIS driver record under 383.71(h)(1)(ii). On September 2, 2026 the FMCSA Learning Center listed exactly two States as not having implemented the rule, Alaska and Louisiana, so drivers licensed there follow their own agency's instructions and still hand in the paper form.
CDL and CLP holders do not, per 391.41(a)(2)(i)(B), effective on or after June 23, 2025. Drivers not required to have a CDL still must have the original or a copy on their person while on duty, per 391.41(a)(1)(i). Anyone holding a medical variance, an exemption letter or an SPE certificate, must carry that document at all times when on duty. Separately, the FMCSA exemption in Docket FMCSA-2026-0265 lets a paper copy prove certification for up to 60 days after issuance, through 11:59 p.m. on October 11, 2026, and FMCSA says not to expect nationwide relief after that.
Up to 24 months under 391.45(b), and 12 months in the specific cases in 391.45(c), (e) and (f): the exempt intracity zone, insulin-treated diabetes certified under 391.46, and the alternative vision standard under 391.44. An examiner may certify for a shorter period. Under 391.45(h) and 391.43(g)(3), on or after June 23, 2025 a finding that a person is not physically qualified invalidates all previously issued certificates.
Two things. You are operating without the qualification the work requires, which is a driver qualification finding against the driver and the carrier. And 383.73(j) requires the State, on determining that a required certification was falsified, to disqualify the CLP or CDL or the pending application, or disqualify the person from operating a CMV, for at least 60 consecutive days.
File it again with your State driver licensing agency. 383.71(g) requires every CLP and CDL holder to provide the certification, and it is required again on renewal, on upgrade, and on transfer to a new State of domicile within no more than 30 days of establishing that domicile. If you are switching to non-excepted interstate, take the DOT physical first so the electronic result and the new category land together.