Missouri Legislation

Year of last legislative change: 2017
Year of last revision to administrative code: Awaiting data
Most challenging aspects associated with introducing and passing interlock legislation:
Changes for program improvement being pursued: Awaiting data
Who is eligible for an interlock in your state according to legislation (Data provided by CIIM):
All impaired drivers
Can impaired drivers 'wait out' their interlock requirement:
Is an interlock required on test refusal:

Program Authority

Type of program: Hybrid
Agency/agencies with authority over the interlock program:
Department of Motor Vehicles, Highway Safety Office
Agency/agencies with authority over participant monitoring:
Department of Motor Vehicles, Courts
Agency/agencies with authority over sanctioning interlock program participants:
Department of Motor Vehicles
Agency/agencies with authority to approve devices:
Department of Motor Vehicles
Training available for judges, law enforcement, and lawyers:
Training is provided for law enforcement as part of the Type 2 certification that involves breathalyzers. This certification requires two hours of interlock training. At the Highway Patrol academy there is also interlock training. Sometimes Don DeBoard and Becky Foster are invited to do training sessions for law enforcement. They have tried to attend conferences and training sessions for judges and prosecutors but have had little success in this area. MO has received a grant from TIRF which they plan to use to train probation and parole officers.

Program Features

Hardship license available to first offenders: Yes
Hardship license available to repeat offenders: Yes
Hardship license (First offenders, Repeat offenders, All): All
Lookback period: Awaiting data
Source of funding: Awaiting data
Indigent funding is available to participants: No
Qualification requirements for indigent funding: Awaiting data
Frequency of interlock device service: 30 days


Participation Rate: Awaiting data
Number of interlock program participants in 2019: >2,000
Indicator used to determine the number of participants in the interlock program (e.g., certificate of device installation, certificate of device removal):
Certificate of device installationQuarterly reports
Indicator(s) used in state as the best measure(s) of the eligible population of offenders for the interlock program to determine the program participation rate:
Number of court/probation orders for interlock
Penalties for non-compliance: Awaiting data

Program Length

Length of Hard Suspension

1st offenders: 1 month
2nd offenders: 6 months
3rd offenders: 6 months
4th and subsequent offenders: Awaiting data

Interlock Program Length

1st offenders: 3 months (maximum)
2nd offenders: 6 months (60 month maximum)
3rd offenders: 6 months (60 month maximum)
4th and subsequent offenders: Awaiting data


Program length is extended for non-compliance: Yes
Length of extension for non-compliance: 3 months
Program length is reduced for compliance: No
Length of reduction for compliance: Awaiting data
Frequency of sanctions imposed for non-compliance: Often
Program exit requirements: Compliance-based removal


Treatment is required for the interlock program: Yes
Components applied to treatment: Yes

Data Collection & Management

Agency responsible for collecting data: Department of Revenue
Overview of Data Management: We receive notice of installations, removals, and failure to maintain. If DOR wants to review the data, they must log into the vendor online portal. Since they own all the data, DOR is limited in what they can do with it. Driver Licensing stores all data that is sent from the vendors. DOR can request it through the IT department, but reports are usually done randomly.
Barriers to data collection: DOR does not own the data, the vendor owns the data.

Vendor Oversight

Number of Vendors in State: Awaiting data
Agency responsible for vendor oversight: Awaiting data
Approval process for new vendors: Awaiting data
Vendor recertification: Awaiting data
Interlock technology features (Data provided by CIIM): Camera, Real-time reporting
Radius requirement for service centers: Awaiting data
Radius requirement: Awaiting data