Montana Code Title 61, Ch. 8, Part 4

61-8-401. Persons under the influence of alcohol or drugs. (1) It is unlawful and punishable, as provided in 61-8-442, 61-8-714, and 61-8-731 through 61-8-734, for a person who is under the influence of:
(a) alcohol to drive or be in actual physical control of a vehicle upon the ways of this state open to the public;
(b) a dangerous drug to drive or be in actual physical control of a vehicle within this state;
(c) any other drug to drive or be in actual physical control of a vehicle within this state; or
(d) alcohol and any dangerous or other drug to drive or be in actual physical control of a vehicle within this state.
(2) The fact that any person charged with a violation of subsection (1) is or has been entitled to use alcohol or a drug under the laws of this state does not constitute a defense against any charge of violating subsection (1).
(3) “Under the influence” means that as a result of taking into the body alcohol, drugs, or any combination of alcohol and drugs, a person’s ability to safely operate a motor vehicle has been diminished.
(4) Upon the trial of any civil or criminal action or proceeding arising out of acts alleged to have been committed by any person driving or in actual physical control of a vehicle while under the influence of alcohol, the concentration of alcohol in the person at the time of a test, as shown by analysis of a sample of the person’s blood or breath drawn or taken within a reasonable time after the alleged act, gives rise to the following inferences:
(a) If there was at that time an alcohol concentration of 0.04 or less, it may be inferred that the person was not under the influence of alcohol.
(b) If there was at that time an alcohol concentration in excess of 0.04 but less than 0.10, that fact may not give rise to any inference that the person was or was not under the influence of alcohol, but the fact may be considered with other competent evidence in determining the guilt or innocence of the person.
(c) If there was at that time an alcohol concentration of 0.10 or more, it may be inferred that the person was under the influence of alcohol. The inference is rebuttable.
(5) The provisions of subsection (4) do not limit the introduction of any other competent evidence bearing upon the issue of whether the person was under the influence of alcohol, drugs, or a combination of alcohol and drugs.
(6) Each municipality in this state is given authority to enact 61-8-406, 61-8-408, 61-8-410, 61-8-714, 61-8-722, 61-8-731 through 61-8-734, and subsections (1) through (5) of this section, with the word “state” in 61-8-406 and subsection (1) of this section changed to read “municipality”, as an ordinance and is given jurisdiction of the enforcement of the ordinance and of the imposition of the fines and penalties provided in the ordinance.
(7) Absolute liability as provided in 45-2-104 will be imposed for a violation of this section.
61-8-402. Blood or breath tests for alcohol, drugs, or both. (1) A person who operates or is in actual physical control of a vehicle upon ways of this state open to the public is considered to have given consent to a test or tests of the person’s blood or breath for the purpose of determining any measured amount or detected presence of alcohol or drugs in the person’s body.
(2) (a) The test or tests must be administered at the direction of a peace officer when:
(i) the officer has reasonable grounds to believe that the person has been driving or has been in actual physical control of a vehicle upon ways of this state open to the public while under the influence of alcohol, drugs, or a combination of the two and the person has been placed under arrest for a violation of 61-8-401;
(ii) the person is under the age of 21 and has been placed under arrest for a violation of 61-8-410; or
(iii) the officer has probable cause to believe that the person was driving or in actual physical control of a vehicle in violation of 61-8-401 and the person has been involved in a motor vehicle accident or collision resulting in property damage, bodily injury, or death.
(b) The arresting or investigating officer may designate which test or tests are administered.
(3) A person who is unconscious or who is otherwise in a condition rendering the person incapable of refusal is considered not to have withdrawn the consent provided by subsection (1).
(4) If an arrested person refuses to submit to one or more tests requested and designated by the officer as provided in subsection (2), the refused test or tests may not be given, but the officer shall, on behalf of the department, immediately seize the person’s driver’s license. The peace officer shall immediately forward the license to the department, along with a report certified under penalty of law stating which of the conditions set forth in subsection (2)(a) provides the basis for the testing request and confirming that the person refused to submit to one or more tests requested and designated by the peace officer. Upon receipt of the report, the department shall suspend the license for the period provided in subsection (6).
(5) Upon seizure of a driver’s license, the peace officer shall issue, on behalf of the department, a temporary driving permit, which is valid for 5 days following the date of issuance and shall provide the driver with written notice of the license suspension or revocation and the right to a hearing provided in 61-8-403.
(6) The following suspension and revocation periods are applicable upon refusal to submit to one or more tests:
(a) upon a first refusal, a suspension of 6 months with no provision for a restricted probationary license;
(b) upon a second or subsequent refusal within 5 years of a previous refusal, as determined from the records of the department, a revocation of 1 year with no provision for a restricted probationary license.
(7) A nonresident driver’s license seized under this section must be sent by the department to the licensing authority of the nonresident’s home state with a report of the nonresident’s refusal to submit to one or more tests.
(8) The department may recognize the seizure of a license of a tribal member by a peace officer acting under the authority of a tribal government or an order issued by a tribal court suspending, revoking, or reinstating a license or adjudicating a license seizure if the actions are conducted pursuant to tribal law or regulation requiring alcohol or drug testing of motor vehicle operators and the conduct giving rise to the actions occurred within the exterior boundaries of a federally recognized Indian reservation in this state. Action by the department under this subsection is not reviewable under 61-8-403.
(9) A suspension under this section is subject to review as provided in this part.
(10) This section does not apply to blood and breath tests, samples, and analyses used for purposes of medical treatment or care of an injured motorist or related to a lawful seizure for a suspected violation of an offense not in this part.

61-8-403. Right of appeal to court. (1) Within 30 days after notice of the right to a hearing has been given by a peace officer, a person may file a petition to challenge the license suspension or revocation in the district court in the county where the person resides or in the county where the arrest was made.
(2) The court has jurisdiction and shall set the matter for hearing. The court shall give at least 10 days’ written notice of the hearing to the county attorney of the county where the appeal is filed and to the city attorney if the incident leading to the suspension or revocation resulted in a charge filed in a city or municipal court. The county attorney or city attorney may represent the state. If the county attorney and the city attorney cannot agree on who will represent the state, the county attorney shall represent the state.
(3) Upon request of the petitioner, the court may order the department to return the seized license or issue a stay of the suspension or revocation action pending the hearing.
(4) (a) The court shall take testimony and examine the facts of the case, except that the issues are limited to whether:
(i) a peace officer had reasonable grounds to believe that the person had been driving or was in actual physical control of a vehicle upon ways of this state open to the public while under the influence of alcohol, drugs, or a combination of the two and the person was placed under arrest for violation of 61-8-401;
(ii) the person is under the age of 21 and was placed under arrest for a violation of 61-8-410;
(iii) the officer had probable cause to believe that the person was driving or in actual physical control of a vehicle in violation of 61-8-401 and the person was involved in a motor vehicle accident or collision resulting in property damage, bodily injury, or death; and
(iv) the person refused to submit to one or more tests designated by the officer.
(b) Based on the above issues and no others, the court shall determine whether the petitioner is entitled to a license or whether the petitioner’s license is subject to suspension or revocation.
(5) This section does not grant a right of appeal to a state court if a driver’s license is initially seized, suspended, or revoked pursuant to a tribal law or regulation that requires alcohol or drug testing of motor vehicle operators.

61-8-404. Evidence admissible — conditions of admissibility. (1) Upon the trial of a criminal action or other proceeding arising out of acts alleged to have been committed by a person in violation of 61-8-401, 61-8-406, 61-8-410, or 61-8-805:
(a) evidence of any measured amount or detected presence of alcohol, drugs, or a combination of alcohol and drugs in the person at the time of the act alleged, as shown by an analysis of the person’s blood or breath, is admissible. A positive test result does not, in itself, prove that the person was under the influence of a drug or drugs at the time the person was in control of a motor vehicle. A person may not be convicted of a violation of 61-8-401 based upon the presence of a drug or drugs in the person unless some other competent evidence exists that tends to establish that the person was under the influence of a drug or drugs while driving or in actual physical control of a motor vehicle within this state.
(b) a report of the facts and results of one or more tests of a person’s blood or breath is admissible in evidence if:
(i) a breath test or preliminary alcohol screening test was performed by a person certified by the forensic sciences division of the department to administer the test;
(ii) a blood sample was analyzed in a laboratory operated or certified by the department or in a laboratory exempt from certification under the rules of the department and the blood was withdrawn from the person by a person competent to do so under 61-8-405(1);
(c) a report of the facts and results of a physical, psychomotor, or physiological assessment of a person is admissible in evidence if it was made by a person trained by the department or by a person who has received training recognized by the department.
(2) If the person under arrest refused to submit to one or more tests as provided in this section, proof of refusal is admissible in any criminal action or proceeding arising out of acts alleged to have been committed while the person was driving or in actual physical control of a vehicle upon the ways of this state open to the public, while under the influence of alcohol, drugs, or a combination of alcohol and drugs.
(3) The provisions of this part do not limit the introduction of any other competent evidence bearing on the question of whether the person was under the influence of alcohol, drugs, or a combination of alcohol and drugs.

61-8-405. Administration of tests. (1) Only a physician or registered nurse, or other qualified person acting under the supervision and direction of a physician or registered nurse, may, at the request of a peace officer, withdraw blood for the purpose of determining any measured amount or detected presence of alcohol, drugs, or any combination of alcohol and drugs in the person. This limitation does not apply to the sampling of breath.
(2) In addition to any test administered at the direction of a peace officer, a person may request that an independent blood sample be drawn by a physician or registered nurse for the purpose of determining any measured amount or detected presence of alcohol, drugs, or any combination of alcohol and drugs in the person. The peace officer may not unreasonably impede the person’s right to obtain an independent blood test. The officer may but has no duty to transport the person to a medical facility or otherwise assist the person in obtaining the test. The cost of an independent blood test is the sole responsibility of the person requesting the test. The failure or inability to obtain an independent test by a person does not preclude the admissibility in evidence of any test given at the direction of a peace officer.
(3) Upon the request of the person tested, full information concerning any test given at the direction of the peace officer must be made available to the person or the person’s attorney.
(4) A physician or registered nurse, or other qualified person acting under the supervision and direction of a physician or registered nurse, does not incur any civil or criminal liability as a result of the proper administering of a blood test when requested in writing by a peace officer to administer a test.
(5) The department in cooperation with any appropriate agency shall adopt uniform rules for the giving of tests and may require certification of training to administer the tests as considered necessary.

61-8-406. Operation of vehicle by a person with alcohol concentration of 0.10 or more. It is unlawful and punishable as provided in 61-8-442, 61-8-722, 61-8-723, and 61-8-731 through 61-8-734 for any person to drive or be in actual physical control of a vehicle upon the ways of this state open to the public while the person’s alcohol concentration, as shown by analysis of the person’s blood, breath, or urine, is 0.10 or more. Absolute liability as provided in 45-2-104 will be imposed for a violation of this section.
61-8-407. Definition of alcohol concentration. For purposes of 16-6-305, 23-2-535, 67-1-211, and this title, “alcohol concentration” means either grams of alcohol per 100 milliliters of blood or grams of alcohol per 210 liters of breath.
61-8-408. Multiple convictions prohibited. When the same acts may establish the commission of an offense under both 61-8-401 and 61-8-406, a person charged with such conduct may be prosecuted for a violation of both 61-8-401 and 61-8-406. However, he may only be convicted of an offense under either 61-8-401 or 61-8-406.
61-8-409. Preliminary alcohol screening test. (1) A person who operates or is in actual physical control of a vehicle upon ways of this state open to the public is considered to have given consent to a preliminary alcohol screening test of the person’s breath, for the purpose of estimating the person’s alcohol concentration, upon the request of a peace officer who has a particularized suspicion that the person was driving or in actual physical control of a vehicle upon ways of this state open to the public while under the influence of alcohol or in violation of 61-8-410.
(2) The person’s obligation to submit to a test under 61-8-402 is not satisfied by the person submitting to a preliminary alcohol screening test pursuant to this section.
(3) The peace officer shall inform the person of the right to refuse the test and that the refusal to submit to the preliminary alcohol screening test will result in the suspension or revocation for up to 1 year of that person’s driver’s license.
(4) If the person refuses to submit to a test under this section, a test will not be given. However, the refusal is sufficient cause to suspend or revoke the person’s driver’s license as provided in 61-8-402.
(5) A hearing as provided for in 61-8-403 must be available. The issues in the hearing must be limited to determining whether a peace officer had a particularized suspicion that the person was driving or in actual physical control of a vehicle upon ways of this state open to the public while under the influence of alcohol or in violation of 61-8-410 and whether the person refused to submit to the test.
(6) The provisions of 61-8-402 (3) through (8) that do not conflict with this section are applicable to refusals under this section. If a person refuses a test requested under 61-8-402 and this section for the same incident, the department may not consider each a separate refusal for purposes of suspension or revocation under 61-8-402.
(7) A test may not be conducted or requested under this section unless both the peace officer and the instrument used to conduct the preliminary alcohol screening test have been certified by the department pursuant to rules adopted under the authority of 61-8-405(5).

61-8-410. Operation of vehicle by person under twenty-one with alcohol concentration of 0.02 or more. (1) It is unlawful for a person under the age of 21 who has an alcohol concentration of 0.02 or more to drive or be in actual physical control of a vehicle upon ways of this state open to the public.
Absolute liability, as provided for in 45-2-104, is imposed for a violation of this section.
(2) Upon a first conviction under this section, a person shall be punished by a fine of not less than $100 or more than $500.
(3) Upon a second conviction under this section, a person shall be punished by a fine of not less than $200 or more than $500 and, if the person is 18 years of age or older, by incarceration for not more than 10 days.
(4) Upon a third or subsequent conviction under this section, a person shall be punished by a fine of not less than $300 or more than $500 and, if the person is 18 years of age or older, by incarceration for not less than 24 consecutive hours or more than 60 days.
(5) In addition to the punishment provided in this section, regardless of disposition:
(a) the person shall comply with the alcohol information course and alcohol and drug treatment provisions in 61-8-714; and
(b) the department shall suspend the person’s driver’s license for 90 days upon the first conviction, 6 months upon the second conviction, and 1 year upon the third or subsequent conviction. A restricted or probationary driver’s license may not be issued during the suspension period until the person has paid a license reinstatement fee in accordance with 61-2-107 and, if the person was under the age of 18 at the time of the offense, has completed at least 30 days of the suspension period.
(6) A conviction under this section may not be counted as a prior conviction under 61-8-401 or 61-8-406.
61-8-421. Forfeiture procedure. (1) A motor vehicle forfeited under 61-8-733 must be seized by the arresting agency within 10 days after the conviction and disposed of as provided in Title 44, chapter 12, part 2. Except as provided in this section, the provisions of Title 44, chapter 12, part 2, apply to the extent applicable.
(2) Forfeiture proceedings under 44-12-201(1) must be instituted by the arresting agency within 20 days after the seizure of the motor vehicle.
(3) For purposes of 44-12-203 and 44-12-204, there is a rebuttable presumption of forfeiture. The owner of the motor vehicle may rebut the presumption by proving a defense under 61-8-733(2) or by proving that the owner was not convicted of a third or subsequent offense under 61-8-401 or 61-8-406. It is not a defense that the convicted person owns the motor vehicle jointly with another person.
(4) (a) For purposes of 44-12-206, the proceeds of the sale of the motor vehicle must be distributed first to the holders of security interests who have presented proper proof of their claims, up to the amount of the interests or the amount received from the sale, whichever is less, and the remainder to the general fund of the arresting agency.
(b) A holder of a security interest may petition the sentencing court for transfer of title to the motor vehicle to the holder of the security interest if the secured interest is equal to or greater than the estimated value of the motor vehicle.
(5) Actions the court may take under 44-12-205(3) to protect the rights of innocent persons include return of the motor vehicle without a sale to an owner who is unable to present an adequate defense under this section but is found by the court to be without fault.
61-8-422. Prohibition on transfer, sale, or encumbrance of vehicles subject to seizure or forfeiture — penalty. (1) It is unlawful for the owner of a vehicle subject to seizure under 61-5-212 or seizure and forfeiture under 61-8-733 to transfer, sell, or encumber the owner’s interest in that vehicle from the time of the owner’s arrest or the filing of the underlying charge until the time that the underlying charge is dismissed, the owner is acquitted of the underlying charge, the issue of seizure or forfeiture is resolved by the sentencing court, or the underlying charge is otherwise terminated.
(2) The prohibition against transfer of title may not be stayed pending the determination of an appeal from the conviction on the underlying charge.
(3) A person who violates this section is guilty of a felony and upon conviction shall be imprisoned in the county jail for not more than 2 years, fined an amount not more than $20,000, or both.
61-8-440. Ignition interlock device — assisting in starting and operating — circumventing — penalty. (1) It is unlawful for a person who is subject to a restriction under 61-8-442 to operate a motor vehicle not equipped with an ignition interlock device.
(2) A person may not knowingly assist a person who is restricted to the use of an ignition interlock device to start and operate the restricted person’s vehicle.
(3) A person may not knowingly circumvent the operation of an ignition interlock device.
(4) A person convicted of a violation of this section shall be punished by a fine of not more than $500 or by imprisonment for not more than 6 months or both.
(5) This section does not apply if:
(a) the starting of a motor vehicle or the request to start a motor vehicle equipped with an ignition interlock device is done for the purpose of safety or mechanical repair of the device or the vehicle; and
(b) the person subject to the restriction does not operate the vehicle.

61-8-441. Department rules regarding ignition interlock devices. (1) The department shall adopt rules providing for the approval of ignition interlock devices and the installation, calibration, repair, and removal of approved devices.
(2) The department’s rules must be based upon federal standards issued for similar devices.
(3) An ignition interlock device that is approved by the department must also:
(a) be designed so it does not impede safe operation of the vehicle;
(b) correlate well with the level established for alcohol impairment;
(c) work accurately and reliably in an unsupervised environment and under extreme weather conditions;
(d) require a deep lung breath sample or use an equally accurate measure of blood alcohol concentration equivalence;
(e) resist tampering and show evidence of tampering if it is attempted;
(f) be difficult to circumvent;
(g) minimize inconvenience of a sober user;
(h) operate reliably over the range of automobile environments and in connection with various manufacturing standards;
(i) be manufactured by a person who is adequately insured for product liability; and
(j) have a label affixed in a prominent location warning that a person who knowingly tampers with, circumvents, or otherwise misuses the device is subject to criminal prosecution.
61-8-442. Driving under the influence of alcohol or drugs — driving with excessive alcohol concentration — ignition interlock device required. (1) In addition to the punishments provided in 61-8-714and 61-8-722, regardless of disposition, the court may restrict a defendant to only driving a motor vehicle equipped with a functioning ignition interlock device and require the defendant to pay the reasonable cost of leasing, installing, and maintaining the device if:
(a) the court determines that approved ignition interlock devices are reasonably available; and
(b) (i) the defendant’s blood alcohol concentration at the time of the arrest was 0.18% or greater; or
(ii) the defendant previously has been convicted of a violation of 61-8-401 or 61-8-406.
(2) Any restriction imposed under this section must be included in a report of the conviction made by the court to the department in accordance with 61-11-101 and placed upon the person’s driving record maintained by the department in accordance with 61-11-102.
(3) The duration of a restriction imposed under this section must run parallel to the time period for suspension or revocation of the driver’s license of the defendant in accordance with 61-2-107, 61-5-205, and61-5-208 and must be monitored by the department.