Q: Why 18-month interlock for 2 DUIs in Maryland instead of 12 months?

A: The Medical Advisory Board of the MVA can decide what is required for you to have a Maryland license. They can decide that the interlock period be 18 months as result of the two DUI’s.

A: In Maryland, interlock requirements for DUIs are determined not only by the number of offenses but also by the time between offenses and whether they are considered “repeat offenses” under state law. Since you had two DUIs in December 2013, the Motor Vehicle Administration (MVA) treats your case as a multiple offense situation, which can trigger a longer interlock period than a single DUI. Maryland law sets minimum interlock periods, and repeat offenders often face extended requirements to enhance public safety.

Even if you served your suspended time and there were no specific court-mandated interlock terms, the MVA has the authority to impose interlock periods based on its administrative rules. The 18-month requirement reflects the classification of your case as a second offense, which is longer than the 12-month minimum for a first DUI. The goal is to ensure ongoing monitoring and reduce the risk of repeat incidents.

If you believe the 18-month term is incorrect, you can request a review or appeal the MVA’s decision. Collect your court documents and proof of prior compliance to support your case. Understanding that the MVA often errs on the side of caution for repeat offenders can help you frame your request effectively.