Sometimes you have to resit the driving test and sometimes you don't, it depends what the magistrate has ordered at the time of sentencing. Usually you get a letter telling you that you have to re-apply for your provisional licence and pass the driving test when your disqualification is over if you want to drive again. If your dad hasn't received that letter or wants to be double sure what the judge has ordered, you can ask him to contact the court where he was sentenced and they will be able to tell him whether he needs to retake his driving test or not.
