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Commonwealth act
The Telecommunications (Interception and Access) Act 1979 is Australia's main law governing when, how, and by whom phone calls, messages, emails, and other electronic communications can be secretly monitored, recorded, or accessed — and what can be done with that information afterwards.
This law affects virtually everyone in Australia:
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Direct links to the current provisions in Telecommunications (Interception and Access) Act 1979.
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View on official registerSourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.
Prohibits unauthorised interception: It is a criminal offence to listen to, record, or access someone else's private communications without their consent or a lawful warrant.
Sets up a warrant system: Law enforcement and intelligence agencies can apply to a judge or authorised official for a warrant allowing them to intercept communications — but only for serious offences (generally crimes carrying at least 3 years' imprisonment) or national security purposes.
Governs stored communications: Separate rules apply for accessing messages, emails, or other data that is stored on a carrier's (telco's) equipment rather than currently passing over the network — think saved voicemails or emails sitting on a server.
Requires data retention: Telecommunications companies must keep certain metadata (information about communications, like who called whom and when, but not the content) for a set period so law enforcement can access it if needed.
Controls how intercepted information can be used: Even if lawfully obtained, intercepted information can only be used for specific purposes — mainly criminal investigations and prosecutions, national security, and certain other proceedings.
Covers a wide range of agencies: Federal Police, state police forces, anti-corruption bodies (like ICAC in NSW, IBAC in Victoria, and others), the Australian Crime Commission, and ASIO all have specific roles and limits under this law.
This Act tries to balance two competing interests: protecting your privacy (everyone has a right to private communications) versus allowing law enforcement and security agencies to investigate serious crime and protect national security. It is the legal framework that stops your phone or internet provider handing over your private messages to anyone who asks — but also the framework that lets police listen to a drug trafficker's calls if a judge has approved it.