Drivers incur demerit points for certain traffic offences. An offence that attracts demerit points remains on your licence record for three years from the date of the offence. If you accumulate more than a set number of demerit points during a three year period you could lose your licence.
If you commit a traffic offence, you may be issued with an expiation notice and have to pay a fine. Expiations can be issued for a variety of reasons. Drivers are most likely to be issued one for a breach of traffic laws - eg a speeding offence.
Summary of common offences and fines – mylicence website
If you have an overdue fine your driver's licence may be suspended or you may be refused vehicle registration.
Fines enforcement restrictions has more information.
If you have any concerns about paying a fine on time contact the Fines Enforcement and Recovery Unit on 1800 659 538 as soon as possible. They can help you with any questions you have about fines.
Immediate loss of licence applies for certain drink-driving and excessive speeding offences.
A serious drink-driving offence is defined as:
You could be disqualified from driving if you:
When returning from disqualification you may have probationary conditions added to your licence.
Drivers who commit a serious drink-driving offence must have an alcohol interlock (breath-testing) device fitted to their vehicle for a period of time at the end of their licence disqualification.