540 CMR, § 25.11
An operator applying to have his or her Ignition Interlock Restriction removed must demonstrate that he or she has had no Ignition Interlock infractions and no Ignition Interlock Violations for the six months immediately preceding his or her application, excluding any periods during which the operator's license was inactive or suspended. If he or she cannot so prove, the Ignition Interlock Restriction will be extended until he or she makes a reapplication that meets this requirement as well as all other licensure requirements. If the operator's Ignition Interlock Restriction was originally imposed for a period of less than six months, then an operator applying to have his or her Ignition Interlock Restriction removed must demonstrate that he or she has had no Ignition Interlock infractions and no Ignition Interlock Violations for the entire period during which that restriction was in place. If he or she cannot so prove, the Ignition Interlock Restriction will be extended for six months from the date of the most recent infraction or violation.
540 CMR, § 25.11