This Act has been repealed and is no longer in force. It is retained for historical reference.
Jurisdiction
Commonwealth
Act Number
34 of 1973
Collection
act
Plain English Summary
6/10 complexity
What this law does
This Act brings into Australian law the international Convention for the Suppression of Unlawful Acts against the Safety of Civil Aviation (the Convention) and creates domestic criminal offences, procedures and penalties to give effect to that Convention and to cover certain situations where the Convention itself does not apply (see the Act's purpose and the Schedule). (s.6, Schedule)
It makes it a crime to do, attempt or be an accomplice to certain acts that threaten the safety of aircraft or air navigation — for example, violence to people on board in flight, destroying or damaging aircraft or air navigation facilities, placing destructive devices on aircraft, or knowingly communicating false information that endangers an aircraft. (s.7(1); Schedule Art.1)
The Act sets maximum prison terms for those offences: up to 14 years for the most serious categories (e.g. violent acts or destruction that endangers flight) and up to 7 years for other covered acts (e.g. placing devices, damaging navigation facilities, false communications). (s.7(3))
Who and what the law covers (who pays / who is affected)
Persons: the offences apply to all persons regardless of nationality, and the Act expressly reaches acts and omissions outside Australia unless a contrary intention appears. (s.5)
Places/flights: offences apply in the specific circumstances set out in the Act, including when the aircraft is in service on a prescribed flight, when it is an Australian Government aircraft, when it is a visiting government aircraft, or when the offender is an Australian citizen outside Australia. (s.7(2)(b), (d); s.3 definition of "prescribed flight" and "Australian aircraft")
Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.
Organisations: the Act recognises Commonwealth authorities (including Qantas by definition) and government aircraft in definitions; the law therefore affects government and commercial operators to the extent their aircraft or flights fall within the Act’s definitions. (s.3)
Financial and operational effects: offenders face imprisonment (s.7(3)); taxpayers and government agencies bear the costs of investigations, custody, remand and prosecutions, and of any co‑operation with international procedures such as extradition (see Schedule Arts.5–9, 11). Airlines and operators face compliance-related effects only to the extent the criminal rules and related procedural requirements (e.g. handing over a person in custody) involve them in investigations or interruptions to service; the Act itself does not create direct civil compliance obligations on carriers beyond the criminal prohibitions and the definitions that determine coverage (s.3, s.7).
How the law works mechanically (who decides, how enforcement proceeds)
Ministerial and executive powers: the Minister appoints "authorized persons" who may take people into custody under the Act (s.3 definition; s.8). The Governor-General may make regulations for running inquiries and other procedural detail (s.23). The Governor-General can also arrange for State Magistrates to perform functions under the Act (s.21).
Arrest and custody: authorized persons may take a suspect into custody where Article 6 of the Convention applies; persons in command of an applicable aircraft may arrest without warrant on board and may restrain or remove persons to prevent offences on board. Arrest powers and custody procedures are set out in detail (s.8, s.9). Copies of evidence records from preliminary inquiries are admissible in later proceedings (s.11, s.15).
Magistrates and courts: the Act establishes preliminary inquiry procedures before Magistrates (s.11), remand limits and rights to release (s.12–13), and provides for inter‑State venue and trial arrangements where offences occur in flight (s.16–19). The Attorney‑General’s written consent is required before proceedings for commitment for trial on indictment may be instituted (s.17).
Interaction with other law: the Act does not intend to displace other Commonwealth or State/Territory laws except where it provides otherwise; double convictions for the same act are prevented (s.20(1)–(3)).
The Act’s stated purpose and trade‑offs
The Act explicitly implements the Convention (s.6, Schedule). It also implements the Convention’s choice-of-jurisdiction and custody duties (Schedule Arts.5–8; Article 6 is reflected in arrest/custody provisions (s.8, s.11)).
The Act extends criminal reach beyond mere territorial boundaries by applying to acts and people outside Australia (s.5) and by making offences applicable in defined extraterritorial situations such as offences by Australian citizens abroad (s.7(2)(d)). That extension creates enforcement costs (investigation, custody, extradition or prosecution) for government and can require international cooperation under the Convention (Schedule Arts.8, 11).
The Act centralises key decisions: the Minister (appointments) and the Attorney‑General (consent to indict) hold significant discretion (s.3, s.17). That concentrates decision-making about who can detain and whether to prosecute; it also creates a single clearance point for serious prosecutions which affects prosecution timing and resource allocation.
Implementation and compliance risks, and practical consequences
Administrative burden and costs: enforcement requires authorised personnel, magistrates to conduct inquiries and courts to try offences; remand timelines and Supreme Court oversight for prolonged remand are prescribed (s.11–14). These are concrete resource demands on courts and corrections.
Jurisdictional complexity: the Act cross‑references Convention jurisdiction rules, creates extraterritorial application, and provides special venue rules for in‑flight offences (s.5, s.7(2), s.16–19). This requires coordination between Commonwealth agencies and State/Territory courts and may complicate decisions about where to try a case.
Concentration of discretion: ministerial appointment powers (s.3), Attorney‑General consent (s.17) and broad regulation-making by the Governor‑General (s.23) give the executive a significant role in detention, prosecution and procedural detail. The Act also allows State magistrates to be engaged under arrangements (s.21), so implementation depends on intergovernmental arrangements.
Concrete incentives and likely behaviour changes
Individuals: the criminal penalties (s.7(3)) create deterrent incentives against the enumerated acts. The Act also permits arrest and immediate restraint on aircraft (s.9), which increases the probability that offenders will be apprehended in real time.
Businesses/operators: the Act creates legal risk where flights fall within the Act’s definitions (s.3, s.7(2)(b)). Operators may change operational practices (security measures, cooperation with authorities) to manage that risk, though the Act itself does not impose specific regulatory duties on carriers beyond criminal prohibitions.
Key legal effects to watch for
Expanded jurisdiction in specified circumstances (s.5; s.7(2)(d)).
Executive discretion over detentions and prosecutions (s.3; s.8; s.17).
Procedural regime for preliminary inquiries, remand limits and admissibility of inquiry records (s.11–15).
This summary describes what the Act does, who it affects and how it operates, and highlights where costs, administrative burdens and executive discretion are concentrated by reference to the relevant sections of the Act.