Ignition Interlock Removal Rules by State
Installing an ignition interlock is only half the requirement — removing it early, or on time, depends on rules that vary widely: some states require a violation-free window at the end of the period, some let a court shorten it, and some simply run it for the length of the suspension. The table lists each state's rule as the statute or licensing agency states it.
48 states verified; 3 pending verification.
| State | Minimum period (first offense) | Compliance period before removal | Rule as stated | Source | Verified |
|---|---|---|---|---|---|
| Alabama | 90 days | none stated as a separate violation-free window; the full IID term must be completed, and any violation during the mandated period extends the term six months | Removal is completion-based and court-authorized: under Ala. Code § 32-5A-191(k)(2) the interlock requirement may be removed only when the court… | alison.legislature.state.al.us | August 29 |
| Alaska | 6 months | none stated; the court-ordered minimum term (6 months first conviction) runs from when the person regains the privilege, including any limited privilege, to drive | Time-based, set by the court judgment: under AS 28.35.030(b)(1) the court requires IID use for a minimum period after the person regains… | dmv.alaska.gov | August 29 |
| Arizona | 12 months, deferrable after 6 | none stated as a violation-free window; six-month deferral under § 28-3319(H) requires a functioning device, 16-hour education, and fewer than two 0.08+ attempts during the restriction | Term-based with an early-deferral provision and violation extensions. | azleg.gov | August 29 |
| Arkansas | 6 months (length of suspension) | final 60 days of the original period (or of an extension) violation-free, certified by the provider | Compliance-certified removal (Act 841 of 2025, adding § 5-65-118(h), effective July 1, 2026): on completion of the required period the person… | arkleg.state.ar.us | August 29 |
| California | Up to 6 months if court-ordered | none stated; the full mandatory term must be served, and periods of noncompliance are not credited (Cal. Veh. Code § 23575.3(j)) | Term-based; no violation-free window or early-removal provision is stated. | leginfo.legislature.ca.gov | August 29 |
| Colorado | 2 years if BAC 0.15+ or refusal | four consecutive monthly reporting periods without an excessive-BAC lockout or tampering (first-time offenders only, § 42-2-132.5(4)(a)(II)(B)); otherwise none stated beyond the minimum term | Compliance-based early removal for first offenders, otherwise term-based. | content.leg.colorado.gov | August 29 |
| Connecticut | 1 year, 6 months if administrative | none stated; each reported violation adds 30 days to the requirement | Term-based with violation extensions. Under Conn. Gen. Stat. § 14-227a(g), the IID restriction runs for one year following restoration after a first… | portal.ct.gov | August 29 |
| Delaware | 12 months (4 if first-offender election) | none stated as a violation-free window; the statutory minimum months (e.g., 12 months for a first conviction below .15) must elapse, and accumulated violations extend the period | Minimum-term with violation extensions and Division-authorized removal. | delcode.delaware.gov | August 29 |
| District of Columbia | 6 months | none stated as a violation-free window; the statutory enrollment period (6 months first offense) must be served, extended 60/90/120 days per violation | Term-based with extensions, and removal only with the DC DMV director's prior approval. | dmv.dc.gov | August 29 |
| Florida | 6 continuous months | none stated (statutory terms are expressed as continuous months/years; early removal may reset the period without credit) | Fla. Stat. § 322.2715(3) expresses each IID term as a minimum number of “continuous” months or years… | flhsmv.gov | August 29 |
| Georgia | Not required (optional permit) | none stated on DDS pages ('successfully maintain' the device for the required 4-month, 12-month term); any statutory compliance condition in O.C.G.A. § 40-5-64.1 / § 42-8-111 could not be verified | On the DDS sources, removal is time-based: the interlock restriction ends after the required term is maintained. | dds.georgia.gov | August 29 |
| Hawaii | 1 year to 18 months (revocation) | For court early termination only: six continuous months of installation followed by three continuous months without violation (HRS § 291E-61(b)(6)); otherwise the full revocation period | Hawaii's interlock requirement runs for the revocation period itself (HRS § 291E-41(b) administratively; § 291E-61(b) on conviction) rather… | data.capitol.hawaii.gov | August 29 |
| Idaho | 1 year | none stated | Idaho's interlock period is fixed rather than compliance-based in the sources. | legislature.idaho.gov | August 29 |
| Illinois | 6 months, 12 if refused (MDDP) | Repeat offenders: 1,826 consecutive days (5 years) of BAIID installation and use on a BAIID Multiple Offender RDP before applying for reinstatement, restarting on any unapproved de-installation (92 Ill. Adm. Code 1001.420(j)(A)). MDDP first offenders: the statutory summary suspension period, extended 3 months per violation (1001.444(e)). | Two regimes. (1) Repeat offenders: 625 ILCS 5/6-205(h) requires ignition interlock devices for not less than 5 years on all vehicles owned… | ilga.gov | August 29 |
| Indiana | Set by the court | none stated (term set by the court under IC 9-30-8-1) | Indiana's interlock term is set by the sentencing court, not by a compliance formula. | iga.in.gov | August 29 |
| Iowa | Restricted-license term or set by court | no fixed violation-free window; the required period is extended 60 days per qualifying occurrence (10+ violations in 30 days, 5+ in 24 hours, tampering/circumvention, unauthorized removal) under Iowa Code § 321J.17A | Iowa uses statutory compliance-based removal. | legis.iowa.gov | August 29 |
| Kansas | 180 days | Not more than two standard violations and no serious violation in the 90 consecutive days prior to application for reinstatement, with the application on or after expiration of the interlock period (K.S.A. 8-1015(d)(2)) | Removal is compliance-based and authorized by KDOR. K.S.A. 8-1015(d)(2) requires completion of the ignition interlock device program… | ksrevisor.gov | August 29 |
| Kentucky | 4 months | 90 consecutive violation-free days (first offense within ten years) or 120 consecutive violation-free days (subsequent offenses), certified by the provider before the restriction is released (KRS 189A.340(4)(b)2.) | Compliance-based. KRS 189A.340(4)(b) keeps the interlock restriction in place for the required suspension period and, if the maximum period has not… | drive.ky.gov | August 29 |
| Louisiana | 6 months | none stated; violations extend the requirement by 1 month (first offense) or 6 months (second or subsequent offense) | No compliance-based early-removal provision was found in La. R.S. 32:378.2 or on the OMV Suspensions page. | legis.la.gov | August 29 |
| Maine | Rest of 150-day suspension, if elected | none stated; device required for the time remaining on the suspension | No compliance-based or early-removal provision was found. | legislature.maine.gov | August 29 |
| Maryland | 6 months | no violations in the last 3 months of the program | Compliance-based. The MVA states program time counts only after the device is installed and the restricted license is obtained within 30 days… | mva.maryland.gov | August 29 |
| Massachusetts | Hardship-license term (BAC .15+ only) | no program infractions or violations for the 6 months preceding the removal request (after a minimum 730 days / 2 years in the program) | Compliance-based, authorized by an RMV Hearings Officer. The RMV IID guide states the restriction is not automatically removed and all operators must… | mass.gov | August 29 |
| Michigan | Rest of 1-year suspension if BAC 0.17+ | high-BAC first offense: no readings of 0.025 g/210 L or more, verified by the provider after the restriction period; revoked drivers: at least one year violation-free on the BAIID before a removal hearing | Compliance-based. For a high-BAC first offense, MCL 257.319(8)(h) provides the device may be removed after the interlock provider verifies… | legislature.mi.gov | August 29 |
| Minnesota | 90 days, 1 year at 2× limit (optional) | final 90 days of the program with no failed breath tests (revoked drivers); a failed test may extend the program by 90 days | Compliance-based, authorized by a DVS full reinstatement letter. | s3.us-east-2.amazonaws.com | August 29 |
| Mississippi | 120 days | last thirty (30) days with no start attempt at 0.04 or more, no failed or missed retest, and no missed vendor appointment (vendor declaration) | Compliance-based, with proof submitted to the Department of Public Safety and the court able to extend the period. | billstatus.ls.state.ms.us | August 29 |
| Missouri | 6 months | final three months of the six-month period violation-free; a violation extends the requirement until a three-consecutive-month violation-free period is completed | Compliance-based with manufacturer certification to the Department of Revenue. The DOR states the IID must be maintained for a minimum of six months… | dor.mo.gov | August 29 |
| Nebraska | 6 months (60 days with probation) | None stated; the interlock permit runs for the court-ordered revocation period (second offense: device installed for the period ordered, at least one year) | Nebraska ties the interlock to the revocation period rather than to a compliance window. | nebraskalegislature.gov | August 29 |
| Nevada | 185 days | none stated; the full ordered period must run, commencing on issuance of the interlock privilege and tolled during imprisonment, residential confinement, treatment supervision, parole or probation (NRS 484C.460(6)) | Removal is tied to expiration of the court-ordered period. | leg.state.nv.us | August 29 |
| New Hampshire | No fixed statutory minimum | none stated as a violation-free window; the expiration date of the order (12 months to 2 years for mandatory orders) including any extensions must have elapsed, with no pending or unscheduled violation hearings (Saf-C 6511.02 as described by NH DMV) | Removal is authorized by the DMV Bureau of Financial Responsibility after the ordered period has run. RSA 265-A:36, I sets the mandatory term… | web.archive.org | August 29 |
| New Jersey | 3 months | Final 30 days of the installation period: not more than one failure to take or pass a test at 0.08% BAC or higher, plus compliance with maintenance, calibration, monitoring and inspection requirements | Under N.J.S.A. 39:4-50.18(c), as amended by P.L.2023, c.191 (section 4), an ignition interlock device is removed on the date the person completes… | pub.njleg.state.nj.us | August 29 |
| New Mexico | 1 year | Minimum six consecutive months of interlock-license driving immediately before the reinstatement review, with no circumvention/tampering attempts and fewer than two recorded vehicle lockouts | NMSA 1978 § 66-5-33.1(B) conditions reinstatement after a DWI, aggravated DWI or Implied Consent revocation on: the additional $75 fee, completion… | nmonesource.com | August 29 |
| New York | 12 months | Minimum twelve months (term of probation or conditional discharge), terminating on proof of at least six months of installation and maintenance (VTL § 1193(1)(b)(ii)) | Under VTL § 1198(2)(a), the court must require a person convicted under VTL § 1192(2), (2-a) or (3) to install and maintain a functioning ignition… | nysenate.gov | August 29 |
| North Carolina | 1 year | Final 90 days before the end of the G.S. 20-17.8(c) requirement must be free of ignition interlock system violations; a violation in that window extends the requirement 90 days or until violation-free for the extended period | G.S. 20-17.8(c) fixes the interlock requirement at one year from the date of restoration if the original revocation was one year, three years if it… | ncleg.gov | August 29 |
| Ohio | No statutory minimum | No ignition interlock device violations within the 60 days prior to the application for reinstatement; a violation in the final 60 days extends the suspension and interlock requirement to 60 days after the violation | Ohio's interlock is a condition of court-granted driving privileges during the suspension: under R.C. 4510.13(A)(5) the order applies 'for… | codes.ohio.gov | August 29 |
| Oklahoma | 180 active ignition-interlock days | last 90 active ignition-interlock days violation-free | Compliance-based through IDAP: the Board of Tests issues a completion certificate only after the active-interlock-day requirement… | oklahoma.gov | August 29 |
| Oregon | 1 year | last 90 consecutive days of the required installation period with no negative report | Compliance-based. Under ORS 813.635(1) the IID requirement continues until the person submits to DMV a certificate from the manufacturer's… | oregonlegislature.gov | August 29 |
| Pennsylvania | 1 year | 60 days (two consecutive months) before the declaration of compliance without a qualifying incident; 30 days for ARD suspensions | Compliance-based. The interlock term is one year (or 18 months under the 2026 amendment) from restoration (§ 3805(e.1)), with credit for time holding… | palegis.us | August 29 |
| Rhode Island | 3 months to 1 year | none stated (record must show the operator fulfilled the interlock requirements set by the sentencing judge or magistrate) | Term-based with a compliance review: the interlock period is set by the court or Traffic Tribunal within the statutory ranges… | rules.sos.ri.gov | August 29 |
| South Carolina | 6 months | none stated (full statutory term; extended by accumulated interlock points) | Term-based, not violation-window based: the device must remain for the statutory term… | scstatehouse.gov | August 29 |
| Tennessee | 365 consecutive days | final 120 consecutive days violation-free | Compliance-based removal under Tenn. Code Ann. § 55-10-425 (offenses on or after Jan. 1, 2023). | tn.gov | August 29 |
| Texas | 50% of supervision, or suspension term | none stated (court-ordered term: duration of suspension for an occupational license; not less than 50 percent of the community-supervision period) | Court-controlled, term-based; no violation-free window stated. | tcss.legis.texas.gov | August 29 |
| Utah | 18 months | none stated (no violation-free window; each breath violation or calibration/monitoring failure adds 60 days per DLD, and days without the device installed are added to the period per § 41-6a-518.2(2)(c)) | Under Utah Code § 41-6a-518.2(2)(b), the interlock restriction for a first DUI conviction ends 18 months from the day the driver provides proof… | le.utah.gov | August 29 |
| Vermont | 90 days | 90 days violation-free from the date of reinstatement (1st DUI offense); 18 months (2nd); 3 years then Total Abstinence approval (3rd or subsequent) — per DMV FAQ VL-086 | Compliance-based. DMV's FAQ states the terms for license restoration are to operate under an RDL violation-free for 90 days from the date… | dmv.vermont.gov | August 29 |
| Virginia | 12 consecutive months | not less than 12 consecutive months without alcohol-related violations (first adult offense on a restricted license; court may set six consecutive months on motion with additional restrictions); DMV 292 states a six-consecutive-month violation-free minimum | Compliance-based, authorized by the local ASAP. Under Va. Code § 18.2-270.1(C), for an adult first § 18.2-266 offense the restricted-license… | law.lis.virginia.gov | August 29 |
| Washington | 1 year | final 180 consecutive days of the IID requirement period violation-free (last 4 consecutive months for convictions before July 23, 2017) | Compliance-based. Under RCW 46.20.720(4), the restriction remains in effect until DOL receives a declaration from the person's ignition interlock… | app.leg.wa.gov | August 29 |
| West Virginia | 125 days | none stated as a violation-free window; the minimum device period (125 or 270 days first offense; 1 year refusal; 2 years repeat) must be successfully completed and may be extended by the Commissioner for violations | Period-based with completion of all program terms. | code.wvlegislature.gov | August 29 |
| Wisconsin | 1 year | none stated as a violation-free window; the restriction runs not less than one year after license issuance (up to the maximum revocation period) and is extended 180 days for each violation occurring 60 or more days after installation (§ 343.301(6)(b)) | Period-based with violation extensions. Under Wis. Stat. § 343.301(2m)(a), the IID restriction begins on the date of the court order and extends not… | docs.legis.wisconsin.gov | August 29 |
| Wyoming | 6 months | none stated; fixed period (6 months / 1 year / 2 years / lifetime with court petition after 5 years) counted from issuance of the IIR license, with no early release | Fixed statutory period, no early removal. | wyoleg.gov | August 29 |
Related: interlock laws by state · reinstatement fees by state
Editor: Ryan · Published by WheelsBack · Verified against primary sources: