In all states, drivers holding a full, unrestricted license will be disqualified from driving after accumulating 12 demerit points or more within a three-year period, except in New South Wales, where drivers are allowed 13 points in a three-year period. Those who can prove they are professional drivers are allowed an additional point. The licence suspension period is three months, plus one further month for every extra four points beyond the threshold, with a cap in most states of five months (for 8 points or more over the threshold; e.g. 20 points or more on a full license). As an alternative to accepting immediate suspension, a driver can apply for a "good behavior" period of 12 months. In most states, drivers under a good behavior period who accumulate one or two further points (except in Victoria, which does not allow any further offences) have their licence suspended for double the original period.