the device also requires breath samples to be provided at random intervals to ensure that the driver has not consumed alcohol such devices have proven to be highly effective terer k and rbrown points can also be allocated in conjunction with a court disqualification where the court chooses to disqualify a person for less than six months demerit points remain active on a licence record for a period of two years from the date of the offence if or more demerit points are accumulated within any two year period a licence will be suspended for a period of three months the suspension period begins as soon as the demerit suspension notice is served on the driver by the transport agency or the police