Colorado reduced its ignition interlock required high Blood Alcohol Content (BAC) standard from 0.17 to 0.15, which does not sound like much but 0.16 and 0.17 are the two most common BAC levels at the time of arrest. This will effect a large number of offenders, especially when you consider that Colorado already has huge numbers in their ignition interlock program.
Missouri and Tennessee amended their DUI laws relation to IID by changing their ignition interlock programs to a true “all offender” status. All BAC’s and all numbers of offenses in those states now require the installation of an ignition interlock to regain driving privileges. New York’s law makers did three things: It tightened up loopholes on the ignition interlock requirement, it extended the minimum term for these same offenders from six months to twelve, and increased the penalty of driving a vehicle (without an ignition interlock) from a traffic infraction to a felony.