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 R.Brown, 2014). 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 100 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.