Why Wyoming Requires IID for the Suspension Period After a DUI

Wyoming statute W.S. 31-5-233 requires ignition interlock device installation as a condition of obtaining a probationary license after a DUI conviction. The device is not optional and it is not deferred until reinstatement. If you want restricted driving privileges during your suspension period, the IID must be installed in any vehicle you operate before WYDOT will issue the probationary license. First-offense DUI convictions carry a mandatory 90-day hard suspension period before you can apply for a probationary license. Second and subsequent offenses extend the hard suspension period. During the hard suspension, no driving is permitted, IID-equipped vehicle or not. After the hard suspension period ends, you apply for the probationary license through Wyoming Driver Services, submit proof of IID installation, and maintain the device for the duration of the probationary period. Most drivers assume the IID is a post-reinstatement requirement or a sentencing add-on separate from the probationary license. Wyoming's structure is different. The IID is the gate—without installation, the probationary license application is denied administratively.

Wyoming probationary license applications are processed by Wyoming Driver Services, part of WYDOT. This is an administrative process, not a court hearing. You submit the completed application, proof of SR-22 insurance filing, proof of IID installation, and documentation of your need for restricted driving—typically employment verification, medical appointment schedules, or school enrollment. Processing times are not published with specificity by WYDOT, and Wyoming's limited staffing means real-world delays may exceed comparable states. Submit applications well before the end of the hard suspension period to account for processing lag. If WYDOT requires additional documentation or clarification, the clock does not pause. Court-ordered DUI suspensions and WYDOT administrative per se suspensions run concurrently in Wyoming's two-tier system. The probationary license addresses both suspension types simultaneously—you do not need separate applications for the court suspension and the administrative suspension. One probationary license, one IID requirement, one SR-22 filing.

WYDOT requires proof of IID installation at the time of probationary license application. You cannot apply for the probationary license, receive conditional approval, and install the device afterward. The sequence is hard: hard suspension period ends, IID is installed by a WYDOT-approved provider, installation receipt is submitted with the probationary license application, and WYDOT processes the application. Approved IID providers in Wyoming are certified through WYDOT's ignition interlock program. Installation costs typically range from $70 to $150, with monthly lease fees of $60 to $90. Calibration appointments every 30 to 60 days add $10 to $20 per visit. Over a 12-month probationary period, total IID cost typically reaches $900 to $1,300. If the IID reports a failed breath test, a missed calibration appointment, or a tampering attempt, WYDOT receives the violation report electronically. Probationary license revocation follows automatically in most cases. The probationary license is not a trial period—it is conditional driving under device monitoring.

Wyoming requires SR-22 insurance filing for DUI convictions. The filing period is 3 years, measured from the conviction date. The SR-22 filing must be active before WYDOT will issue the probationary license, and it must remain active through the entire 3-year filing period, even after the probationary license expires and full driving privileges are reinstated. SR-22 is not a type of insurance—it is a certificate filed by your insurer confirming you carry at least Wyoming's minimum liability coverage: $25,000 bodily injury per person, $50,000 bodily injury per accident, and $20,000 property damage. If your policy lapses or cancels, the carrier notifies WYDOT electronically within 24 hours, and your probationary license is revoked immediately. If you do not own a vehicle after the DUI conviction—common after impound, sale, or surrender—non-owner SR-22 policies provide the required filing without insuring a specific vehicle. Carriers writing non-owner SR-22 policies in Wyoming include GEICO, Progressive, Dairyland, and The General. Monthly premiums for non-owner SR-22 coverage typically range from $40 to $80, substantially lower than owner SR-22 policies because non-owner policies exclude collision and comprehensive coverage.

Wyoming probationary licenses restrict driving to specific approved purposes: employment, school, medical appointments, DUI education program attendance, and other essential needs defined by WYDOT or the court. Recreational driving, social errands, and visits unrelated to approved purposes are prohibited. WYDOT may specify route restrictions or time restrictions on the probationary license itself. Violating the restrictions—driving outside approved purposes or hours—triggers automatic probationary license revocation. Wyoming law enforcement has access to your probationary license status during traffic stops. A single documented violation typically results in immediate revocation, and reinstatement after revocation requires waiting until the full suspension period expires with no probationary license option. Employers sometimes require documentation of your probationary license status and restrictions before allowing you to drive company vehicles. HR departments flag IID-equipped vehicles as liability concerns, and some employers prohibit probationary license holders from operating fleet vehicles regardless of the approved-purpose framing. Confirm your employer's policy before assuming the probationary license satisfies work-driving requirements.

When the suspension period ends and the probationary license expires, you apply for full license reinstatement through Wyoming Driver Services. The reinstatement fee is $50. You must submit proof of SR-22 filing continuity—no lapses during the probationary period—and proof of IID compliance if the device was required. IID removal is handled by the approved provider who installed the device. Removal fees typically range from $50 to $100. The provider submits a compliance report to WYDOT confirming no violations occurred during the monitoring period. If violations occurred, WYDOT may extend the IID requirement or deny reinstatement pending a hearing. The SR-22 filing requirement continues for the full 3-year period even after reinstatement. Drivers often assume SR-22 ends when the probationary license expires—it does not. Allow the SR-22 to lapse before the 3-year filing period ends and Wyoming suspends your license again, requiring a new reinstatement fee, a new SR-22 filing, and a new application process.