Transport Minister Steven Joyce is to review a legal loophole that allows disqualified drink drivers to get their licences back without any assessment or treatment.
The Transport Agency says convicted drink drivers given an indefinite licence suspension can apply to get their licences back after one year and one day - but only if they undergo alcohol and drug assessment.
But it says no assessment is needed for people who have completed a finite suspension - whether that be two years or five years.
Alcohol counsellor Roger Brooking says he thinks judges and politicians have been assuming that these drink drivers have to automatically go through some sort of drink driving process.
But he says this isn't the case, and once their suspension term is up, they're given back their licences automatically.