Ignition interlock devices — Massachusetts Permit Test
Ignition interlock devices on the Massachusetts permit test — 3 rules, each with the reason behind it and a question on it while it is fresh.
The rules
A driver with two or more operating under the influence offenses who becomes eligible for a hardship license or reinstatement must have an Ignition Interlock Device.
It is not optional and the driver pays for it. The device is what a second offense buys.
If you had two or more operating under the influence offenses and are eligible for a hardship license or for license reinstatement, you must have an Ignition Interlock Device.
The Ignition Interlock Device must be used for the whole time you hold a hardship license and for two more years after reinstatement.
Reinstatement does not end it. Two more years of blowing into the device is part of the penalty.
You must keep using the device for two more years after your license has been reinstated.
The device is attached to the driver's motor vehicle at the driver's own expense.
The state requires it and the driver pays for it, which is one more reason a second offense costs far more than the fine.
It must be attached to your motor vehicle at your expense.
On the test
Who must have an Ignition Interlock Device installed?
A driver with two or more operating under the influence offenses. It is not optional and the driver pays for it. The device is what a second offense buys. Massachusetts Driver's Manual, p.73: “If you had two or more operating under the influence offenses and are eligible for a hardship license or for license reinstatement, you must have an Ignition Interlock Device.”
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Where these come from
Every rule here is checked against Massachusetts Driver's Manual, published by the Massachusetts Registry of Motor Vehicles, and against the state code itself. Last checked 2026-09-16.
- src/assets/drivers-manuals/MA.pdf (Massachusetts Driver's Manual, Revised April 2026, Massachusetts Registry of Motor Vehicles, retrieved 2026-09-14 from mass.gov)
- src/assets/drivers-manuals/MA.pages.txt (pdftotext -layout over that PDF; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/SOURCES.json (sha256, folio offset 8, folioMarker, nonLawPages, signGalleryPages and the extraction flag, each with its measured basis)