For an ordinary DOT medical examination covered by section 391.43, with no examiner exception applicable, how should a CDL driver choose an examiner?
Correct answer: Choose an examiner listed on the National Registry of Certified Medical Examiners.
The general rule requires a National Registry-listed medical examiner. A routine medical appointment or first-aid credential does not by itself establish authorization to perform the covered DOT examination; the regulation has specific examiner exceptions.
Source: 49 CFR 391.43 (a); official eCFR text current through September 10, 2026, reviewed September 14, 2026. ↗
A licensed optometrist performs the permitted vision portion of a DOT examination. Does that provision alone authorize the optometrist to complete every part of the examination?
Correct answer: No; that exception covers the specified vision portion.
Section 391.43(b)(1) permits a licensed ophthalmologist or optometrist to perform the specified vision portion. That exception alone does not establish qualification to perform the rest of the DOT examination.
Source: 49 CFR 391.43 (b)(1); official eCFR text current through September 10, 2026, reviewed September 14, 2026. ↗
A driver subject to the ordinary Part 391 medical examination interval has no shorter applicable interval or new impairment. What period does section 391.45(b) use?
Correct answer: The preceding 24 months.
The ordinary rule requires examination and certification during the preceding 24 months. Specific conditions require shorter intervals, and a new impairing injury or disease can require another examination sooner; this is not a guarantee of a two-year certificate for every driver.
Source: 49 CFR 391.45 (b); official eCFR text current through September 10, 2026, reviewed September 14, 2026. ↗
A driver's current medical certificate has months left, but an injury has impaired the ability to perform normal duties. Does the unexpired certificate remove the need for another required medical examination?
Correct answer: No; that new impairment triggers examination and certification.
Section 391.45(g) requires medical examination and certification when physical or mental injury or disease impairs the driver's ability to perform normal duties. It does not require waiting for an older certificate to expire or determine the driver's ultimate medical outcome.
Source: 49 CFR 391.45 (g); official eCFR text current through September 10, 2026, reviewed September 14, 2026. ↗
At a covered medical examination after June 23, 2025, the examiner finds a driver not physically qualified. Can the driver use an older, unexpired medical certificate as proof of qualification?
Correct answer: No; previously issued medical certificates are no longer valid.
The current rule states that all previously issued medical examiner's certificates are invalid when the examiner finds the driver not physically qualified and reports that finding. The driver must not treat an older certificate as an alternative qualification.
Source: 49 CFR 391.43 (g)(3); official eCFR text current through September 10, 2026, reviewed September 14, 2026. ↗
A medical examiner delays the qualification determination for more information or further examination. What time window must the examiner explain for providing that information or completing the examination?
Correct answer: Within 45 days.
Section 391.43(g)(4) specifies 45 days and reporting the examination as pending. This is a window for completing the medical determination, not an automatic extension of an expired medical certificate or permission to drive while unqualified.
Source: 49 CFR 391.43 (g)(4); official eCFR text current through September 10, 2026, reviewed September 14, 2026. ↗
A registered medical examiner completes a covered DOT examination. What is the federal deadline for electronically transmitting its results?
Correct answer: Midnight local time of the next calendar day.
The federal rule specifies midnight local time of the next calendar day after completion. This is not the two-business-day ELDT training-provider deadline and should not be described as a generic business-day medical reporting period.
Source: 49 CFR 391.43 (g)(5)(i)(B); official eCFR text current through September 10, 2026, reviewed September 14, 2026. ↗
A CDL driver has a current medical certificate but is now too ill or fatigued to drive safely, with no grave emergency. Does the certificate authorize continuing the trip?
Correct answer: No; the driver must not operate while that impairment makes driving unsafe.
Section 392.3 prohibits unsafe operation from illness, fatigue or similar impairment and prohibits the carrier from requiring or permitting it. A current medical certificate is not a daily guarantee of alertness or fitness; the rule has a narrowly defined grave-emergency exception.
Source: 49 CFR 392.3 Ill or fatigued operator; official eCFR text current through September 10, 2026, reviewed September 14, 2026. ↗
A covered driver has engaged in prohibited DOT drug-or-alcohol conduct and has not met the return-to-duty requirements. Can a valid CDL card alone permit safety-sensitive work?
Correct answer: No; the prohibition covers safety-sensitive functions, including CMV driving.
The driver must not perform covered safety-sensitive functions after prohibited conduct unless the applicable return-to-duty requirements are satisfied. A current license card, another employer or an informal assurance is not a substitute.
Source: 49 CFR 382.501 (a)–(b); official eCFR text current through September 10, 2026, reviewed September 14, 2026. ↗
A driver wants a return-to-duty test before the substance abuse professional determines successful compliance with prescribed education or treatment. Is that the required sequence?
Correct answer: No; the SAP determination must come before the return-to-duty test.
The employer must ensure that the return-to-duty test occurs after the SAP determines successful compliance with the prescribed education or treatment. Taking a test early does not complete that process.
Source: 49 CFR 40.305 (a); official eCFR text current through September 10, 2026, reviewed September 14, 2026. ↗
Before resuming safety-sensitive duties through the return-to-duty process, what testing results are required as applicable?
Correct answer: A negative drug result and/or alcohol concentration below 0.02.
The applicable return-to-duty test must be negative for drugs and/or show an alcohol concentration below 0.02. These results are part of the process, not a substitute for SAP compliance or required restoration of licensing privileges.
Source: 49 CFR 40.305 (a); official eCFR text current through September 10, 2026, reviewed September 14, 2026. ↗
A driver's CLP or CDL privilege was removed following the drug-and-alcohol prohibition. Before driving a CMV again, what licensing step is still required?
Correct answer: The state licensing agency must reinstate the CLP or CDL privilege.
When the commercial driving privilege has been removed, section 382.503(b) requires its reinstatement by the state driver licensing agency before CMV driving resumes. Completing another part of the return-to-duty process does not itself reissue the state privilege.
Source: 49 CFR 382.503 (b); official eCFR text current through September 10, 2026, reviewed September 14, 2026. ↗
A driver has met the DOT conditions for return to safety-sensitive duty. Does section 40.305 require the former employer to put the driver back in that position?
Correct answer: No; meeting those conditions does not itself require the employer to return the driver.
The rule permits return after the conditions are met but does not require the employer to return the employee to safety-sensitive work. Personnel decisions remain subject to other applicable legal and contractual requirements.
Source: 49 CFR 40.305 (b); official eCFR text current through September 10, 2026, reviewed September 14, 2026. ↗
What minimum follow-up testing must the SAP's plan prescribe in the first 12 months of safety-sensitive duty after return?
Correct answer: Six unannounced follow-up tests.
The plan must prescribe at least six unannounced follow-up tests in the first 12 months of safety-sensitive duty after return. More tests may be required; a negative return-to-duty test does not replace follow-up testing.
Source: 49 CFR 40.307 (d); official eCFR text current through September 10, 2026, reviewed September 14, 2026. ↗
A driver changes employers before completing the SAP's required follow-up tests. Does the job change cancel the remaining plan?
Correct answer: No; the follow-up requirements continue with subsequent employers.
The SAP's follow-up testing requirements follow the employee to later employers and through breaks in service. Changing jobs does not erase the outstanding testing obligations.
Source: 49 CFR 40.307 (e); official eCFR text current through September 10, 2026, reviewed September 14, 2026. ↗
Does completion of the first 12 months of follow-up testing automatically end every SAP-prescribed testing plan?
Correct answer: No; follow-up may extend for up to 48 additional months of safety-sensitive duty.
The SAP may require follow-up testing during the 48 months of safety-sensitive duty after the first 12-month period, subject to the rule's modification provisions. The first-year minimum is not an automatic end date for every plan.
Source: 49 CFR 40.307 (d)(2) and (f); official eCFR text current through September 10, 2026, reviewed September 14, 2026. ↗
