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Missouri Driver Improvement Program (DIP) — Frequently Asked Questions

1. Program Overview & Purpose

What is Missouri's Driver Improvement Program (DIP)?

Missouri’s Driver Improvement Program (DIP) is a state-approved educational course that allows eligible drivers to prevent points from being assessed on their driving record after a moving violation conviction. When a court orders a driver to complete a DIP, the Missouri Department of Revenue will accept the course completion in lieu of assessing points for qualifying violations. The program must be approved by the Missouri State Highways and Transportation Commission and must meet or exceed the National Safety Council’s 8-hour Defensive Driving Course standard.

It is important to understand that the DIP does not dismiss the traffic ticket or erase the conviction from your record — the conviction remains, but the points associated with it are stayed (not assessed).

Source: RSMo § 302.302

What is the purpose of the Driver Improvement Program?

The DIP serves two primary purposes. First, it gives Missouri drivers the opportunity to avoid accumulating points on their driving record after a moving violation, which helps them maintain a clean license and avoid higher insurance rates. Second, the course provides meaningful defensive driving education that refreshes drivers’ knowledge of traffic laws, hazard awareness, and safe driving strategies.

By incentivizing education over punishment, Missouri’s system encourages drivers to become safer on the road while still holding them accountable through the conviction itself.

Source: RSMo § 302.302

Does completing DIP dismiss my traffic ticket?

No — this is one of the most common misconceptions. Completing the Driver Improvement Program does not dismiss your traffic ticket and does not remove the conviction from your record. The conviction for the moving violation remains on your driving history. What DIP does is prevent the points associated with that conviction from being assessed on your license. Think of it this way: the ticket stands, the fine stands, but the points are stayed.

This distinction matters because the conviction may still be visible to insurance companies and on background checks, even though no points were assessed.

Source: RSMo § 302.302

Who oversees the Driver Improvement Program in Missouri?

The Missouri State Highways and Transportation Commission is responsible for approving driver improvement programs and motorcycle-rider training courses under the statute. The Missouri Department of Revenue administers the point system itself and processes Form 4444 completion records forwarded by the courts. The courts play the central gatekeeper role — only a judge can order a driver to complete the DIP, and the court is responsible for forwarding the completion record to the Director of Revenue within 15 days.

Source: RSMo § 302.302

Is the Driver Improvement Program the same as traffic school?

The terms are often used interchangeably, but there are important distinctions. “Traffic school” is a general term that can refer to many types of driving courses. Missouri’s Driver Improvement Program is a specific, state-approved program authorized under RSMo § 302.302 that must be approved by the State Highways and Transportation Commission. Only a course meeting these specific approval requirements will be accepted by the Department of Revenue in lieu of point assessment. A generic defensive driving course that is not approved under this statute will not qualify for point avoidance in Missouri.

Source: RSMo § 302.302

2. Eligibility & Court Approval

Who is eligible for Missouri's Driver Improvement Program?

Eligibility depends on several factors. To qualify for the DIP, a driver must have been convicted of an eligible moving violation under subdivisions (1), (2), or (4) of RSMo § 302.302 subsection 1, or under subsection 3. The driver must not hold a commercial driver’s license (CDL) from any state, and the violation must not have been committed in a commercial motor vehicle. Additionally, the driver must not have completed a DIP for point avoidance within the previous 36 months.

Even if these criteria are met, the court retains full discretion to grant or deny the DIP option on a case-by-case basis.

Source: RSMo § 302.302

Do I need the court's permission to take the DIP?

Yes — court approval is mandatory. Unlike some states where you can simply enroll in a defensive driving course on your own, Missouri requires that the DIP be “ordered and verified by any court having jurisdiction.” You must appear in court (or follow the court’s specific procedures) and request permission from the judge. The court decides whether to grant the DIP option based on the circumstances of your case. You cannot simply complete the course on your own and submit it to the Department of Revenue — it must be court-ordered.

Source: RSMo § 302.302

Can the court deny my request for the DIP?

Yes. The court has full discretion to grant or deny the DIP option. Even if you meet all the technical eligibility requirements — eligible violation type, no CDL, haven’t used DIP in 36 months — the judge may still deny your request based on the specifics of your case. Factors like your driving history, the severity of the offense, whether injuries were involved, and your demeanor in court may all play a role. There is no automatic right to the DIP; it is a privilege that the court may extend at its discretion.

Source: RSMo § 302.302

Can CDL holders use the Driver Improvement Program?

No. The statute explicitly excludes commercial driver’s license holders from the DIP point-avoidance benefit. This exclusion applies in two ways: (1) if the violation was committed in a commercial motor vehicle as defined in RSMo § 302.700, or (2) if the driver holds a CDL or is required to obtain a CDL in Missouri or any other state — regardless of what vehicle they were driving at the time of the violation. This means even if a CDL holder receives a ticket while driving their personal car, they cannot use the DIP to avoid points.

Source: RSMo § 302.302

What violations are eligible for the DIP?

The DIP applies to violations listed under specific subdivisions of RSMo § 302.302. Eligible violations generally include:

  • Subdivision (1): General moving violations — 2 points (1 point for municipal stop-sign violations without an accident)
  • Subdivision (2): Speeding — 3 points (state law) or 2 points (county/municipal ordinance)
  • Subdivision (4): Careless and imprudent driving — 4 points (state law) or 2 points (county/municipal ordinance)
  • Subsection 3: Additional 2 points when personal injury or property damage results from certain violations

Most common traffic tickets — speeding, running a stop sign, improper lane change, failure to yield — fall within these categories.

Source: RSMo § 302.302

What violations are NOT eligible for the DIP?

Several serious violations are excluded from DIP eligibility because they fall under subdivisions not covered by the statute’s point-avoidance provision. These include:

  • DWI/DUI — 8 points (first offense) or 12 points (subsequent offenses)
  • Leaving the scene of an accident — 6 points (property damage) to 12 points (fatality or injury with failure to stop)
  • Any felony involving a motor vehicle — 12 points
  • Operating on a suspended or revoked license — 12 points
  • Violations committed in a commercial motor vehicle

These high-point violations reflect the most dangerous driving behaviors and are not eligible for point avoidance through the DIP under any circumstances.

Source: RSMo § 302.302

What about motorcycle violations — can I take DIP?

Not the standard DIP. The statute specifies that for violations committed while operating a motorcycle, the driver must complete a motorcycle-rider training course (not a standard driver improvement program) approved by the State Highways and Transportation Commission. The same rules apply — court-ordered, within 60 days, no more than once in 36 months — but the course itself must be motorcycle-specific. A standard DIP course will not satisfy the requirement for a motorcycle violation.

Source: RSMo § 302.302

How often can I use the DIP to avoid points?

The DIP can be used no more than once in any 36-month (3-year) period. This means if you complete the DIP to avoid points for one violation, you must wait a full 36 months before you can use it again for another violation. The 36-month clock starts from the date of the previous DIP completion, not the date of the new violation. If you receive a second ticket within that 36-month window, the points from the second violation will be assessed to your record — the DIP option is not available.

Source: RSMo § 302.302

3. Missouri Point System

How does Missouri's point system work?

Missouri uses a point-based system to track driving violations. When a driver is convicted of a moving violation, the Director of Revenue assesses a specific number of points against the driver’s record based on the type and severity of the offense. Points accumulate over time, and reaching certain thresholds can trigger license suspension or revocation. The point system is designed to identify and take action against habitually dangerous drivers while giving occasional offenders the opportunity to correct their behavior — which is where the DIP comes in.

Source: RSMo § 302.302; RSMo § 302.304

How many points are assessed for common violations?

Here is a breakdown of the most common Missouri point values:

  • General moving violation (state law): 2 points
  • Municipal stop-sign violation (no accident): 1 point
  • Speeding (state law): 3 points
  • Speeding (county or municipal ordinance): 2 points
  • Careless/imprudent driving (state law): 4 points
  • Careless/imprudent driving (county/municipal): 2 points
  • Additional points for injury/damage: +2 points when personal injury or property damage results

These are the violation categories eligible for DIP point avoidance. Higher-point violations like DWI and leaving the scene are not eligible.

Source: RSMo § 302.302

How many points does it take to lose my license?

Missouri law sets specific accumulation thresholds that trigger license revocation:

  • 12 points within 12 months — license revocation for 1 year
  • 18 points within 24 months — license revocation for 1 year
  • 24 points within 36 months — license revocation for 1 year

Additionally, accumulating 8 or more points within 18 months can trigger a license suspension. These thresholds make it clear why avoiding even 2 or 3 points through the DIP can be critical — a single speeding ticket (3 points) combined with one more violation could put you dangerously close to suspension territory.

Source: RSMo § 302.304

Do points ever expire or come off my record?

Missouri tracks points over rolling time windows (12, 24, and 36 months) for the purpose of determining license revocation. Points are assessed at the time of conviction and remain relevant for the applicable time period. Once a point falls outside the rolling window (e.g., a point assessed more than 36 months ago is no longer counted toward the 36-month threshold), it no longer counts toward revocation thresholds. However, the underlying convictions remain on your driving record. The DIP is the only mechanism to prevent points from being assessed in the first place.

Source: RSMo § 302.302; RSMo § 302.304

What happens if my license is revoked for excessive points?

If you accumulate enough points to trigger revocation under RSMo § 302.304, your license will be revoked for one year. During this period, you cannot legally drive. After the revocation period, you must apply for reinstatement, which may involve additional fees, testing, and proof of insurance (SR-22). A revocation is far more serious than a suspension and can have lasting consequences on your driving record, insurance rates, and employment opportunities. This is why the DIP — which prevents points from being assessed — is such a valuable tool for eligible drivers.

Source: RSMo § 302.304

4. How DIP Prevents Points

How exactly does the DIP prevent points from going on my record?

The process works through a coordinated system involving the court and the Department of Revenue. When you are convicted of an eligible moving violation and the court orders you to complete a DIP, the court notifies the Department of Revenue that point assessment should be stayed pending completion of the program. Once you complete the approved course within 60 days, the court forwards a record of your completion (MO Form 4444) to the Director of Revenue within 15 days. The Director then accepts the completion in lieu of assessing points for that violation.

Source: RSMo § 302.302

Title

“Staying” points means the assessment of points is held in abeyance — essentially paused and then cancelled upon successful completion of the DIP. The statute uses the phrase “staying the assessment of points,” which means the points are not removed (because they were never assessed in the first place). If you fail to complete the DIP within the required 60 days, the stay would be lifted and the points would be assessed to your record. Think of it as a conditional hold: complete the course on time, and the points never appear; fail to complete it, and the points go through.

Source: RSMo § 302.302

Does the DIP remove the conviction from my driving record?

No. The DIP only prevents points from being assessed — it does not erase, dismiss, or expunge the underlying conviction. The moving violation conviction will still appear on your Missouri driving record. Insurance companies may still be able to see the conviction when reviewing your history. The benefit of the DIP is specifically and exclusively the avoidance of point assessment, which protects you from accumulating points toward suspension or revocation thresholds.

Source: RSMo § 302.302

Will my insurance rates still go up if I complete the DIP?

The DIP prevents points from being assessed on your driving record, but the conviction itself remains visible. Whether your insurance rates increase depends on your specific insurer’s policies. Some insurance companies base rate increases on convictions alone, while others focus on the point status. In many cases, having zero points assessed for the violation is better than having 2–4 points on your record, and some insurers may view a DIP completion favorably. Contact your insurance company for specifics about how they handle convictions with stayed points.

Source: RSMo § 302.302

What happens if I don't complete the DIP on time?

If you fail to complete the DIP within 60 days of the conviction date, the course completion will not be accepted in lieu of points. The Department of Revenue will then assess the full points for the violation to your driving record. There are no extensions or exceptions written into the statute — the 60-day deadline is absolute. This is why it’s important to enroll in and begin your approved DIP course as soon as possible after receiving court approval.

Source: RSMo § 302.302

Can I use the DIP for multiple violations at the same time?

The statute provides for the DIP to be used for “a violation” — singular — and limits usage to once in any 36-month period. If you receive multiple citations from the same traffic stop, the court may allow the DIP to cover one eligible violation, but points from any additional violations would likely be assessed. The specifics depend on how the court handles your case. If you have questions about multiple citations, discuss the situation with the judge or a traffic attorney before assuming the DIP will cover all of them.

Source: RSMo § 302.302

5. Course Requirements & Deadlines

How long is the Missouri Driver Improvement Program course?

The course is 8 hours in length. It must meet or exceed the National Safety Council’s 8-hour Defensive Driving Course standard. This duration is mandated to ensure comprehensive coverage of defensive driving topics including traffic law review, hazard recognition, and collision avoidance strategies. With Defensive Drivers Institute’s online course, you work through the 8 hours at your own pace — you can log in and out as needed and pick up right where you left off.

Source: RSMo § 302.302

What is the deadline to complete the DIP?

You must complete the DIP within 60 days of the date of conviction. This is a hard deadline set by statute — not 60 days from the date of the ticket, not 60 days from the court appearance, but 60 days from the conviction date. If the course is not completed within this window, the completion will not be accepted and points will be assessed to your record. Given that the course is 8 hours long, it’s wise to start well before the deadline to avoid any last-minute issues.

Source: RSMo § 302.302

Does the course need to be approved by a specific agency?

Yes. The driver improvement program must be approved by the Missouri State Highways and Transportation Commission. This is the state agency charged with certifying that a course meets the required standards. Additionally, the course must meet or exceed the National Safety Council’s 8-hour Defensive Driving Course standard. A course that is not approved by the Commission — even if it teaches defensive driving — will not be accepted by the Department of Revenue for point avoidance.

Source: RSMo § 302.302

Can I take the DIP online or does it have to be in person?

Both options are available. The statute explicitly states that “the operator shall be given the option to complete the driver-improvement program through an online or in-person course.” This means you have the legal right to choose an online course if you prefer. Online courses like DDI’s Missouri DIP course offer the same state-approved content in a self-paced, convenient format that you can complete from home on any device.

Source: RSMo § 302.302

What happens if I start the course but don't finish before the deadline?

If you do not complete the full 8-hour course within 60 days of your conviction date, the course will not be accepted in lieu of points — even if you started it before the deadline. Partial completion does not count. The statute requires “satisfactory completion” within the 60-day window. The points for your violation will then be assessed to your driving record as if you had never been granted the DIP option. This underscores the importance of starting the course promptly after your court date.

Source: RSMo § 302.302

Is there a final exam or test I need to pass?

Most approved DIP courses include knowledge checks or module quizzes throughout the course to ensure you’re engaging with the material. These assessments verify that you understand key defensive driving concepts, traffic laws, and hazard-avoidance strategies. With Defensive Drivers Institute, quizzes are integrated into each module and are designed to reinforce learning — they are straightforward and not designed to trick you. You must satisfactorily complete the course to receive your certificate.

Don't let the 60-day deadline pass — keep points off your record

6. Course Content & Curriculum

What topics does the Missouri DIP course cover?

The course curriculum meets or exceeds the National Safety Council’s 8-hour Defensive Driving Course standard and covers a comprehensive range of driving safety topics:

  • Missouri traffic laws — current rules of the road, right-of-way, speed limits, and traffic signals
  • Defensive driving techniques — strategies for anticipating and avoiding hazards
  • Collision avoidance — proper following distances, lane changes, and intersection navigation
  • Impaired driving — effects of alcohol, drugs, and medications on driving ability
  • Distracted driving — cell phone use, passengers, and other common distractions
  • Adverse conditions — driving in rain, snow, ice, fog, and nighttime conditions
  • Road rage and aggressive driving — recognition and avoidance strategies
  • Vehicle safety and maintenance — tire condition, brakes, lights, and essential checks

Source: RSMo § 302.302 (course must meet NSC 8-hour Defensive Driving Course standard)

What is the National Safety Council (NSC) standard?

The National Safety Council is a nonprofit organization that sets nationally recognized standards for safety education, including defensive driving courses. The NSC’s 8-hour Defensive Driving Course standard establishes minimum curriculum requirements, instructional methods, and learning objectives that courses must meet. Missouri requires DIP courses to meet or exceed this standard, ensuring that every approved course provides comprehensive, evidence-based safety education — not a watered-down or abbreviated version.

Source: RSMo § 302.302

Will the course teach me anything useful, or is it just a formality?

The DIP is designed to provide genuinely useful education, not just check a box. The NSC standard ensures the curriculum covers practical defensive driving strategies that apply to real-world driving situations. Many drivers report that the course reminded them of traffic laws they had forgotten, introduced new safety concepts, and made them more aware of their driving habits. Even experienced drivers benefit from a refresher on topics like proper following distance, intersection safety, and the dangers of distracted driving. The 8-hour format ensures thorough coverage rather than a superficial overview.

Does the course cover Missouri-specific traffic laws?

Yes. While the course follows the NSC Defensive Driving Course framework, it includes content specific to Missouri traffic laws and regulations. This includes Missouri speed limits, right-of-way rules, DWI/DUI laws, seatbelt requirements, and other state-specific provisions. Understanding Missouri’s specific laws is an important part of the course because traffic regulations can vary significantly from state to state, and the goal is to ensure you know the rules that apply where you drive.

Source: RSMo § 302.302

Is the course content the same online and in person?

Both online and in-person courses must meet the same approval standards — approved by the Missouri State Highways and Transportation Commission and meeting or exceeding the NSC 8-hour Defensive Driving Course standard. The core curriculum and learning objectives are the same regardless of delivery format. The difference is in the delivery method: in-person courses are typically held in a classroom over one or two days, while online courses allow you to complete the material at your own pace from any location with internet access.

Source: RSMo § 302.302

7. Taking the Course Online

Is an online DIP course legally valid in Missouri?

Yes — absolutely. The statute explicitly authorizes online courses. RSMo § 302.302 states that “the operator shall be given the option to complete the driver-improvement program through an online or in-person course.” This means an approved online course is every bit as valid as a classroom course for the purpose of staying point assessment. The court and the Department of Revenue must accept an approved online course completion just as they would an in-person completion.

Source: RSMo § 302.302

Can I take the course at my own pace?

Yes. Online courses like the one offered by Defensive Drivers Institute are completely self-paced. You can log in and out as many times as you need, and your progress is saved automatically. There is no requirement to complete the course in a single sitting — you can work through it over multiple sessions across days or weeks, as long as you finish within the 60-day deadline from your conviction date. Many drivers complete it in a few sittings over a weekend.

What devices can I use to take the course?

DDI’s online course works on any device with an internet connection:

  • Desktop or laptop computers (Windows or Mac)
  • Tablets (iPad, Android, etc.)
  • Smartphones (iPhone, Android)

The course runs in any modern web browser — no special software downloads or app installations required. You can even switch between devices mid-course; your progress saves to your account automatically.

What are the advantages of taking the DIP online versus in person?

Online courses offer several significant advantages over traditional classroom settings:

  • Convenience — complete the course from home, work, or anywhere with internet access
  • Flexibility — work at your own pace, log in and out as needed, no fixed schedule
  • No travel — no need to drive to a classroom, find parking, or sit in traffic
  • Device freedom — take the course on your computer, tablet, or phone
  • Immediate start — enroll and begin right away, don’t wait for the next class date
  • Progress saving — your place is saved automatically if you need to step away

Given the 60-day deadline, the ability to start immediately and work at your own pace makes online courses especially practical. Start your Missouri DIP course with DDI today →

8. Certificate & MO Form 4444

What do I receive when I complete the Missouri DIP course?

Upon successfully completing the 8-hour course, you receive two key documents: a completion certificate and MO Form 4444. The completion certificate serves as your personal proof that you finished an approved driver improvement program. MO Form 4444 is the official state form that gets submitted to the court and ultimately forwarded to the Missouri Department of Revenue to officially stay the assessment of points on your driving record.

With Defensive Drivers Institute, your certificate and Form 4444 are generated promptly upon completion.

Source: RSMo § 302.302

What is MO Form 4444?

MO Form 4444 is the official Missouri completion form for the Driver Improvement Program. It serves as the verified record that a driver has satisfactorily completed an approved DIP course. This form is the critical document in the point-avoidance process — without it, the Department of Revenue has no basis to stay the point assessment. The form includes your identifying information, the course completion date, the course provider’s information, and the court case details. It is submitted to the court, which then forwards it to the Director of Revenue.

Source: RSMo § 302.302

Who submits Form 4444 to the Department of Revenue?

The court is responsible for forwarding the completion record to the Director of Revenue. The statute states: “Every court having jurisdiction pursuant to the provisions of this subsection shall, within fifteen days after completion of the driver-improvement program… forward a record of the completion to the director.” This means you typically submit your Form 4444 and completion certificate to the court that ordered the DIP, and the court then sends it to the Department of Revenue within 15 days.

Source: RSMo § 302.302

How quickly does the court forward my completion to the Department of Revenue?

The statute requires the court to forward the completion record within 15 days after the driver improvement program is completed. In practice, processing times may vary by court. If you’re concerned about whether your completion has been properly reported, you can contact the court clerk to confirm they have received and forwarded your Form 4444. You may also check your driving record through the Missouri Department of Revenue to verify that no points have been assessed.

Source: RSMo § 302.302

Do I need to submit the certificate to the court myself?

Yes, in most cases. After completing the course, you are typically responsible for submitting your completion certificate and MO Form 4444 to the court that ordered the DIP. The court then verifies the completion and forwards the record to the Department of Revenue. Some courts may have specific submission requirements — mail, in-person drop-off, or electronic filing — so check with your court clerk for their preferred method. DDI provides you with all necessary documentation upon course completion so you can submit it promptly.

Source: RSMo § 302.302

Can I get a replacement certificate if I lose mine?

Most course providers can issue a replacement certificate if yours is lost or damaged. With DDI, your completion records are stored in your account and can be accessed and reprinted at any time. It’s a good idea to keep a digital copy (PDF or photo) of both your completion certificate and Form 4444 as a backup, in addition to the printed copies you submit to the court.

How can I verify that points were successfully stayed on my record?

You can check your Missouri driving record through the Missouri Department of Revenue to confirm that no points were assessed for the violation. You can request a copy of your driving record online, by mail, or in person at a Missouri Department of Revenue office. If you see points assessed for a violation that should have been covered by the DIP, contact the court that ordered the DIP to confirm they forwarded your completion record, and then follow up with the Department of Revenue.

Source: RSMo § 302.302

9. About Defensive Drivers Institute

Is Defensive Drivers Institute approved to offer Missouri's DIP?

Yes. Defensive Drivers Institute (DDI) is an approved provider of the Missouri Driver Improvement Program. DDI’s course is approved by the Missouri State Highways and Transportation Commission and meets or exceeds the National Safety Council’s 8-hour Defensive Driving Course standard. Upon completion, DDI issues MO Form 4444 and a completion certificate that are accepted by Missouri courts and the Department of Revenue for point avoidance.

Source: RSMo § 302.302

How much does DDI's Missouri DIP course cost?

For current pricing, please visit DDI’s Missouri Driver Improvement Program course page. DDI is committed to offering affordable, accessible driver improvement education with no hidden fees — the listed price includes everything: the full 8-hour course, all quizzes and assessments, your completion certificate, and MO Form 4444. There are no surprise processing charges or additional certificate fees.

What makes DDI different from other Missouri DIP providers?

Here’s what sets Defensive Drivers Institute apart:

  • State-approved — approved by the Missouri State Highways and Transportation Commission
  • 100% online — complete from home on any device: computer, tablet, or phone
  • Completely self-paced — log in and out as many times as you want; your progress saves automatically
  • 8 hours — meets the NSC Defensive Driving Course standard with no unnecessary filler
  • Prompt certificate delivery — your completion certificate and MO Form 4444 are generated upon finishing
  • No hidden fees — one price covers the entire course, certificate, and Form 4444
  • Works on all devices — desktop, laptop, tablet, and smartphone compatible
  • Trusted experience — DDI has trained over 1 million drivers across multiple states

How do I get started with DDI's Missouri course?

Getting started is simple:

  1. Get court approval — ensure the judge has ordered the DIP for your violation
  2. Visit DDI’s Missouri DIP course page
  3. Register and enroll — create your account and pay the course fee
  4. Complete the course — work through the 8-hour course at your own pace
  5. Receive your documents — get your completion certificate and MO Form 4444
  6. Submit to the court — provide your documents to the court that ordered the DIP

Remember: you have 60 days from your conviction date to complete the course, so don’t delay. The sooner you start, the more flexibility you have.

10. Sources & Citations

All answers on this page cite official Missouri government sources. Links open in a new tab for your reference.

Missouri Revised Statutes (RSMo)

StatuteSubject
RSMo § 302.302Point system & Driver Improvement Program — point values for violations (subdivisions 1-4), DIP eligibility, court-ordered completion, 60-day deadline, 36-month frequency limit, CDL exclusion, motorcycle-rider course alternative, MO Form 4444, NSC 8-hour standard, online/in-person option
RSMo § 302.304License suspension and revocation — 8+ points in 18 months triggers suspension; 12 points in 12 months, 18 in 24 months, or 24 in 36 months triggers 1-year revocation
RSMo § 302.700Commercial motor vehicle definitions — defines “commercial motor vehicle” and “commercial driver’s license” referenced in DIP exclusion

Official Resources

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