THE state government will review controversial laws that force some drink-drivers to have breathalyser locks installed in their vehicles.
It comes after concerns were raised by Tasmania's legal fraternity, which sees the program as retrospective and overly punitive.
Under the Mandatory Alcohol Interlock Program repeat or serious drink-drivers have to fit the device to their car when they reapply for a licence.
The program costs about $3000, runs for 15 months and works by preventing the car from starting if the driver has been drinking alcohol.
It was introduced by the government in July.
Launceston's Byron Faulkner was disqualified from driving for 15 months and fined $1500 after being caught drink-driving.
Mr Faulkner, who is a pensioner, believes applying the new interlock laws to those who offended before the program was introduced is unfair.
"I fronted the magistrate in 2011 copped it sweet on the chin for what I'd done and now they want me to spend another 15 months under restrictions and pay on average $240 a month," he said.
Australian Lawyers Alliance spokesman Greg Barns believes the interlock program could see an increase in unlicensed driving by motorists unable to afford the regime.
"No one has a problem with interlock devices, however, most people have a problem with retrospective legislation," Mr Barns said.
Mr Barns said if magistrates were aware of the program two years ago, it would have been taken in to account in sentencing.
"It will lead to an increase in unlicensed driving and it will undercut what the government is attempting," he said.
But Infrastructure Minister David O'Byrne said he won't be apologising for the tough conditions.
"I make no apology for suggesting that they should not be on the road unrestricted until they have proved to the community that they can separate their drinking and their driving and not risk the lives of innocent Tasmanians," Mr O'Byrne said.
"It (the interlock) does not target minor offenders or people who have merely made a mistake. It applies to people who have knowingly got behind the wheel of a car and driven at the risk of their own life, the lives of others and the entire community, in some instances on numerous occasions."
In the four years to 2012, alcohol was a factor in the death of 53 people and 317 more were seriously injured on state roads, he said.
Mr O'Byrne said financial hardship was a major consideration during the interlock's research stage with costs "minimised with low entry, exit and servicing fees and all other costs smoothed over a minimum 15-month period".
Australian Health Care Card holders receive a 35 per cent discount and the government is waiving set-up fees until October 31.
Mr O'Byrne said there would be a six-month review of the program and he would meet the Tasmanian Law Society to discuss its concerns regarding the law's retrospectivity.
"The (program) does not apply retrospectively as getting a licence back after a period of disqualification ... has never been an automatic right," he said..