The Privacy Amendment (Notifiable Data Breaches) Act 2017 amended the Privacy Act 1988 to create a mandatory notification scheme for eligible data breaches. The Act itself is short, but it inserted a detailed new Part into the Privacy Act dealing with when a breach is notifiable, how an entity must assess a suspected breach, what must be included in a statement to the Information Commissioner, and how affected individuals must be notified.
The legislation is aimed at situations where personal information, credit information or tax file number information is compromised in a way that is likely to cause serious harm. It is not limited to deliberate attacks. The scheme expressly covers unauthorised access, unauthorised disclosure, and loss of information in certain circumstances. That means a ransomware event, an email sent to the wrong recipient, a lost device, or a misplaced file can all need legal assessment.
The practical effect for businesses is that data breach response is a legal compliance issue, not just an IT issue. Once the legal trigger is met, the entity must move quickly. The law sets a 30 day outer timeframe for completing a reasonable and expeditious assessment of a suspected eligible data breach, and then requires notification steps as soon as practicable if the entity has reasonable grounds to believe an eligible data breach has happened.