Of the 77 offenders who have received interlock licences, 68 have had interlocks fitted to their vehicles.
NZTA road safety director Ernst Zollner said interlocks and zero-alcohol licences were part of a concerted effort to reduce deaths and injuries caused by drink-drivers.
"Every year dozens of innocent road users are killed or seriously injured because of the reckless behaviour and poor decisions of people who drink too much and get behind the wheel," Mr Zollner said.
The same legislation gave courts the power to impose zero-alcohol sanctions on serious and repeat offenders, requiring drivers to maintain a zero alcohol limit for a fixed period of three years.
Since September 10, 2012, more than 3800 zero-alcohol sanctions have been handed down and 171 zero-alcohol licences have been issued.
Associate Transport Minister Michael Woodhouse said although it was too early to evaluate the effectiveness of the legislation, a review of the policy is due next year.
Overall, the number of serious crashes with drink-drivers had dropped in recent years and 2013 was on course to have the lowest road toll in more than 50 years, he said. APNZ