Subd. 1. Revocation periods for DWI convictions.

Except as provided in subdivision 7, the commissioner shall revoke the driver's license of a person convicted of violating section 169A.20 (driving while impaired) or an ordinance in conformity with it, as follows:

1. (1) for an offense under section 169A.20, subdivision 1 (driving while impaired crime): not less than 30 days;
2. (2) for an offense under section 169A.20, subdivision 2 (refusal to submit to chemical test crime): not less than 90 days;

3. (3) for an offense occurring within ten years of a qualified prior impaired driving incident:

   1. (i) if the current conviction is for a violation of section 169A.20, subdivision 1, not less than 180 days and until the court has certified that treatment or rehabilitation has been successfully completed where prescribed in accordance with section 169A.70 (chemical use assessments); or
   2. (ii) if the current conviction is for a violation of section 169A.20, subdivision 2, not less than one year and until the court has certified that treatment or rehabilitation has been successfully completed where prescribed in accordance with section 169A.70;
4. (4) for an offense occurring within ten years of the first of two qualified prior impaired driving incidents: not less than one year, together with denial under section 171.04, subdivision 1, clause (10), until rehabilitation is established in accordance with standards established by the commissioner; or
5. (5) for an offense occurring within ten years of the first of three or more qualified prior impaired driving incidents: not less than two years, together with denial under section 171.04, subdivision 1, clause (10), until rehabilitation is established in accordance with standards established by the commissioner.

Subd. 2. Driving while impaired by person under age 21.

If the person convicted of violating section 169A.20 (driving while impaired) is under the age of 21 years at the time of the violation, the commissioner shall revoke the offender's driver's license or operating privileges for a period of six months or for the appropriate period of time under subdivision 1, clauses (1) to (5), for the offense committed, whichever is the greatest period.

Subd. 3. Juvenile adjudications.

For purposes of this section, a juvenile adjudication under section 169A.20 (driving while impaired), an ordinance in conformity with it, or a statute or ordinance from another state in conformity with it is an offense.

Subd. 4. Violations involving personal injury.

Whenever department records show that the violation involved personal injury or death to any person, at least 90 additional days must be added to the base periods provided in subdivisions 1 to 3.

Subd. 5. Violations involving alcohol concentration of 0.20 or more.

If the person is convicted of violating section 169A.20 (driving while impaired) while having an alcohol concentration of 0.20 or more as measured at the time, or within two hours of the time, of the offense, the commissioner shall revoke the person's driver's license for twice the period of time otherwise provided for in this section.

Subd. 6. Applicability of implied consent revocation.

Except for a person whose license has been revoked under subdivision 2, and except for a person convicted of a violation of section 169A.20 (driving while impaired) while having a child under the age of 16 in the vehicle if the child is more than 36 months younger than the offender, any person whose license has been revoked pursuant to section 169A.52 (license revocation for test failure or refusal) as the result of the same incident, and who does not have a qualified prior impaired driving incident, is subject to the mandatory revocation provisions of subdivision 1, clause (1) or (2), in lieu of the mandatory revocation provisions of section 169A.52.

Subd. 7. Alcohol-related commercial vehicle driving violations.

1. (a) The administrative penalties described in subdivision 1 do not apply to violations of section 169A.20, subdivision 1 (driving while impaired crime), by a person operating a commercial motor vehicle unless the person's alcohol concentration as measured at the time, or within two hours of the time, of the operation was 0.10 or more or the person violates section 169A.20, subdivision 1, clauses (1) to (4) or (7).
2. (b) The commissioner shall disqualify a person from operating a commercial motor vehicle as provided under section 171.165 (commercial driver's license, disqualification), on receipt of a record of conviction for a violation of section 169A.20.
3. (c) A person driving, operating, or in physical control of a commercial motor vehicle with any presence of alcohol is prohibited from operating a commercial motor vehicle for 24 hours from issuance of an out-of-service order.

Subd. 8. Underage drinking and driving violations.

The administrative penalties described in section 169A.33, subdivision 3, apply to violations of section 169A.33 (underage drinking and driving).

Subd. 9. Alcohol-related school bus driving violations.

The administrative penalties described in section 171.3215 (canceling school bus endorsements for certain offenses) apply to violations of section 169A.20 (driving while impaired) by a person driving, operating, or in physical control of a school bus or Head Start bus.

Subd. 10. License revocation; court invalidation.

1. (a) Except as provided in subdivision 7, on behalf of the commissioner, a court shall serve notice of revocation or cancellation on a person convicted of a violation of section 169A.20 (driving while impaired) unless the commissioner has already revoked the person's driving privileges or served the person with a notice of revocation for a violation of section 169A.52 (license revocation for test failure or refusal) arising out of the same incident.
2. (b) The court shall invalidate the driver's license or permit in such a way that no identifying information is destroyed.

Subd. 11. Chemical use assessment.

When the evidentiary test shows an alcohol concentration of 0.07 or more, that result must be reported to the commissioner. The commissioner shall record that fact on the driver's record. When the driver's record shows a second or subsequent report of an alcohol concentration of 0.07 or more within two years of a recorded report, the commissioner may require that the driver have a chemical use assessment meeting the commissioner's requirements. The assessment must be at the driver's expense. In no event shall the commissioner deny the license of a person who refuses to take the assessment or to undertake treatment, if treatment is indicated by the assessment, for longer than 90 days. If an assessment is made pursuant to this section, the commissioner may waive the assessment required by section 169A.70.