Telecommunications (Prohibition of Mobile Phone Boosters) Declaration 2021

The central concept is the definition of “mobile phone booster” in section 6. It requires all six elements: the equipment must be customer equipment (as defined in the Act); it must connect by means of physical contact with a mobile station (a mobile phone or similar device); it must transmit radio emissions to, and receive radio emissions from, a base station; it must amplify radio emissions transmitted to the base station; it must draw power from a power source; and it must operate within one or more frequency bands used for the supply of a public mobile telecommunications service. Additionally, the device must not be of a kind described in subsection (2) (the export and repeater exclusions). The physical-contact requirement is noteworthy: a device that boosts signals wirelessly without a physical connection to the mobile station (for example, a cradle that couples inductively or a repeater connected via cable to the phone’s antenna port) may still meet the “physical contact” test if there is direct connection. But a purely over-the-air repeater that does not touch the phone would not be a mobile phone booster - it would likely be a cellular mobile repeater, which is excluded.

“Cellular mobile repeater” is defined separately in section 5. It means a radiocommunications device that draws power and, operating as a single device or as part of a system, is able to: (a) receive a radio emission from a base station and retransmit it (or a replica) to another base station or to a mobile station; or (b) receive a radio emission from a mobile station and retransmit it to a base station or another mobile station. This definition is broad and captures both commercial and consumer repeaters. Because the definition of mobile phone booster expressly excludes cellular mobile repeaters, the declaration does not cover repeaters at all. However, that does not mean repeaters are unregulated: they may be subject to other prohibitions or licensing under the Radiocommunications Act 1992 or other ACMA instruments. The instrument does not affect those regimes.

Other defined terms anchor the scope of the prohibition. “Base station” means a station that is part of a telecommunications network through which a public mobile telecommunications service is supplied. “Frequency band” takes its meaning from the Radiocommunications Act 1992. “Mobile station” and “station” are defined by reference to the Radiocommunications (Interpretation) Determination 2025 (as amended). These cross-references mean that the instrument’s scope evolves as those underlying instruments change, though a contrary intention would override that. The “public mobile telecommunications service” is a term defined in the Telecommunications Act 1997, covering standard mobile phone services.

The prohibition itself has three limbs: operation, supply, and possession for the purpose of operation or supply. “Supply” would include sale, hire, lease, and perhaps even giveaway for promotional purposes. “Possession for the purpose” requires an intentional element; mere storage or transit without intention to operate or supply is not prohibited, though proving negative may be difficult. The burden of proof for the mental element would fall on the prosecution in a criminal context, but under civil penalty provisions the standard may differ.

The “reasons set out in Schedule 1” are not provided in the source text. However, from the subject matter, they likely relate to the risk of harmful interference to mobile networks, degradation of network quality, breaches of carrier licence conditions, or safety issues. Without access to Schedule 1, the precise justification remains opaque - a significant gap for compliance professionals and journalists. The instrument itself does not explain why the prohibition is necessary; it merely declares it.

The declaration directly affects three groups: suppliers, operators, and possessors with intent. Suppliers include importers, wholesalers, retailers, and online marketplaces that sell or distribute devices meeting the definition of mobile phone booster. This covers both domestic and international sellers who supply into the Australian market. E-commerce platforms that facilitate sales by third parties may need to consider whether they are “supplying” within the meaning of the Act; the term supply is not defined in this instrument but would take its meaning from the Telecommunications Act 1997, where it typically includes offering, agreeing to supply, and causing to be supplied.

Operators are any person who uses a mobile phone booster in Australia. This includes private individuals in homes, businesses in offices or warehouses, and organisations such as hotels, hospitals, or mining companies that deploy boosters to improve coverage in dead zones. The prohibition applies regardless of whether operation causes actual interference. It is a strict prohibition: no compliance pathway exists. Therefore, anyone currently operating such a device must cease immediately or face enforcement action.

Possessors with the purpose of operation or supply are also caught. This targets persons who stockpile boosters for future sale or personal installation. Casual possession without intent (for example, holding a device in transit to return it to a supplier) may not be caught, but the burden of showing lack of purpose rests with the alleged offender in practice because the prohibition creates an offence of strict liability? The parent Act would govern. Because the instrument does not specify a defence, it is likely a strict liability offence subject to the standard defences under the Criminal Code (mistake of fact, reasonable excuse, etc.).

Users of cellular mobile repeaters are not directly affected by this declaration, but they must ensure their device is not also a mobile phone booster by meeting the physical contact criterion. Many consumer “signal boosters” sold online are actually repeaters that consist of an outdoor antenna, an indoor antenna, and an amplifier box - these would have no physical connection to the phone and thus are not boosters under this definition. However, some cradle-style boosters that the phone sits in are caught because they connect physically and amplify.

Businesses that manufacture equipment solely for export are unaffected for that purpose. This exemption prevents the declaration from hindering Australian manufacturing intended for overseas markets where boosters may be legal. However, if such equipment is inadvertently diverted to the domestic market, it would lose the exemption.

The enforcement burden falls on the ACMA. The Australian Communications and Media Authority is responsible for monitoring compliance, issuing infringement notices, seeking injunctions, and prosecuting breaches. The ACMA’s existing powers under the Telecommunications Act 1997 (including entry, search, and seizure) apply. The declaration does not create a private right of action for individuals complaining about interference; enforcement is at the regulator’s discretion.

The instrument imposes a single duty: not to operate, supply, or possess for the purpose of operation or supply any device that is a mobile phone booster. This duty is negative in character: it forbids conduct. There are no positive obligations such as registration, labelling, reporting, or disclosure. The duty applies to every person in Australia, whether natural or legal, and to conduct outside Australia that has an effect in Australia (under the extraterritorial operation of the Telecommunications Act 1997, likely). Because the declaration is a legislative instrument, it has the force of law.

The duty is not subject to exceptions within the instrument other than the two exclusions in the definition (export equipment and cellular mobile repeaters). There is no provision for individual exemptions, class exemptions, permissions, or licences. This is a complete prohibition. If a device falls within the definition, any dealing is illegal. There is no grandfathering for devices purchased before the commencement date. The instrument commenced on 24 August 2021, so devices acquired before that date are not automatically lawful; their continued operation after commencement is prohibited.

Correlative rights are limited. A person subject to the prohibition has a right to be dealt with according to law in enforcement proceedings, including the right to a fair hearing, the right to raise defences (such as reasonable mistake of fact if the device does not meet the definition in unexpected ways), and the right to challenge the validity of the instrument itself by judicial review. However, the instrument has not been challenged, and its validity seems robust given proper delegation under the parent Act.

The exclusion for cellular mobile repeaters creates a de facto right for suppliers and users of repeaters: they are not prohibited by this instrument. However, that “right” is merely the negative space of the definition; it does not confer an entitlement to operate repeaters without restriction. Other laws (Radiocommunications Act 1992, carrier licence conditions, EMI standards) may separately forbid or restrict repeaters. The instrument’s silence on repeaters is not an authorisation.

The “right” to manufacture boosters solely for export is also a negative carve-out. Export manufacturers may lawfully produce devices that would otherwise be prohibited, provided they do not supply them domestically. The instrument does not require the manufacturer to take steps to prevent domestic diversion.

The instrument does not itself prescribe penalties. It merely declares the prohibition. The enforcement teeth come from the Telecommunications Act 1997. Section 450 of that Act empowers the ACMA to make declarations prohibiting the operation, supply, or possession of specified customer equipment. Contravening a declaration is an offence under the Act. Specifically, section 454 of the Telecommunications Act 1997 (as it stood at the time of drafting) provides that a person must comply with a prohibition under a declaration made under section 450. The penalty for an individual is the maximum set out in the Act for such an offence, which is likely a fine of up to 5,000 penalty units for a body corporate and 200 penalty units for an individual (per offence). As at 2025, a penalty unit is $313, so the maximum fine for an individual would be $62,600 and for a corporation $1,565,000. However, the exact penalty provisions should be verified from the Act because the declaration does not restate them and the user’s source does not include the Act.

The ACMA also has civil penalty powers. It can issue infringement notices (on-the-spot fines) for contraventions without going to court, typically for lower-level offences. The amount of an infringement notice is set by regulation, but for a company it can be up to 60 penalty units ($18,780) and for an individual up to 12 penalty units ($3,756). The ACMA may also seek injunctions to restrain ongoing operation of boosters, and orders for forfeiture of devices.

Enforcement can be triggered by complaints from mobile network operators (Telstra, Optus, TPG) who detect interference or by ACMA monitoring. The ACMA has the power to inspect premises with a warrant, seize devices, and demand information. There is no requirement for the ACMA to warn before acting.

Possession for the purpose of operation or supply is a separate offence, extending the prohibition upstream. A retailer holding stock with intent to sell is caught even before any sale occurs. A person holding a booster “just in case” may not be caught unless the prosecution can prove the purpose element.

Defences under the Criminal Code (such as mistake of fact) apply. For example, if a person reasonably believed a device was a cellular mobile repeater but it actually met the booster definition due to physical contact, they may have a defence. However, the instrument itself provides no specific defence. The burden of proof on the prosecution for the elements of the offence, including the definitional provisions, is beyond reasonable doubt in criminal proceedings.

The declaration operates within a complex web of telecommunications and radiocommunications law. It is made under the Telecommunications Act 1997 and must be read in conjunction with that Act. The definition of “customer equipment” is critical: only equipment that is customer equipment (defined in the Act as equipment used, or intended for use, in connection with a telecommunications network) is capable of being a mobile phone booster. Devices that are network equipment (for example, a base station in a box) are not customer equipment and therefore cannot be a booster under this definition, even if they physically connect to a phone.

The Radiocommunications Act 1992 governs all radiocommunications devices, including cellular mobile repeaters. That Act prohibits the operation of radiocommunications devices without a licence or authorisation, subject to exemptions. Repeaters may require a spectrum licence, apparatus licence, or class licence. The declaration does not repeal or modify those obligations. Therefore, even if a device is not a mobile phone booster (e.g., a repeater), it may still be illegal under the Radiocommunications Act if it operates in a licensed band without authority. Conversely, a device that is a mobile phone booster is illegal under this declaration regardless of any authorisation under the Radiocommunications Act - the declaration overrides any potential licensing.

The exclusion for equipment manufactured solely for export interacts with the Customs Act 1901 and export control laws. Exporters must still comply with all other laws, including restrictions on the export of certain radiocommunications devices (e.g., encryption, military use). The declaration does not confer export rights.

The instrument also interacts with state and territory fair trading laws. Supplying a prohibited mobile phone booster may also constitute supplying unsafe goods or goods that do not comply with a mandatory safety standard under the Australian Consumer Law (ACL), depending on whether the ACMA deems them unsafe. However, the declaration itself is not a safety standard; it is a direct prohibition.

The amendment history shows an interaction with the Radiocommunications (Interpretation) Determination 2025, which updated the definitions of “mobile station” and “station”. This ensures consistency with other ACMA instruments. The declaration incorporates those definitions dynamically, meaning it changes as the underlying determination changes. This is efficient but means the scope of the prohibition can shift without public notice if the determination is amended. Users must monitor the interpretation determination.

The declaration does not include a specific provision about severability or interaction with carrier licence conditions. Carriers (mobile network operators) have their own obligations under carrier licences to minimise interference. The declaration does not impose duties on carriers; it targets user equipment.

The instrument was originally made on 23 August 2021 and registered as F2021L01177, commencing the next day, 24 August 2021. It replaced any earlier versions - there were no predecessor prohibitions of this specific kind, except possibly earlier ACMA class licensing limitations.

The only amendment to date was made by the Communications (Interpretation) (Consequential Amendments) Instrument 2025 (F2025L00361), registered on 14 March 2025 and commenced on 31 March 2025. That amending instrument modified section 5 (definitions) by updating the references for “mobile station” and “station”. Previously, these definitions pointed to the Radiocommunications (Interpretation) Determination 2015 (or some earlier determination). The 2025 amendment replaced those references with the Radiocommunications (Interpretation) Determination 2025 (and allowed for later replacement instruments). This was a housekeeping change to reflect a new interpretation determination that consolidated or revised definitions.

The amendment history endnote also shows that section 2 (the commencement provision) was repealed by operation of section 48D of the Legislation Act 2003. Standard legislative instrument practice: section 2 is automatically repealed after commencement because it is no longer needed. Similarly, section 4 (which likely stated something about the instrument being a legislative instrument) was repealed by section 48C of the Legislation Act 2003. Those are routine technical repeals not affecting substance.

No further amendments are recorded. The instrument is short; only one substantive section (definition and prohibition) has been amended, and only in a minor way. The core prohibition and exclusions remain unchanged.

The source text does not mention any litigation involving this specific declaration. There is no publicly known case law that interprets its provisions. The instrument is relatively new (2021) and deals with a narrow product category. It is possible that ACMA enforcement actions have been resolved by infringement notices without court proceedings. Alternatively, some suppliers may have challenged the validity of the declaration on administrative law grounds (e.g., unreasonableness, lack of procedural fairness), but none appears in published decisions.

The absence of litigation does not mean the instrument is uncontroversial. It may simply reflect that the ACMA’s enforcement discretion has not been tested, or that affected parties have complied rather than fight. However, for legal analysts, the lack of precedent means the scope of the definition and the “purpose” element for possession remain untested. Courts may give a wide or narrow reading to “physical contact” or “amplifies radio emissions transmitted to the base station”. Future litigation could arise if a supplier argues that a certain device is a cellular mobile repeater and not a booster, or that the prohibition is invalid for exceeding the power under section 450 (though that seems unlikely).

Because the declaration interacts with other laws, litigation under the Radiocommunications Act involving repeaters may indirectly shed light on the distinction, but not directly.

Several aspects of this instrument are easily overlooked or misunderstood. First, the exclusion of cellular mobile repeaters is not a safe harbour for all repeaters. The exclusion ensures only that the declaration does not prohibit them. But the Radiocommunications Act 1992 generally prohibits operation of a radiocommunications device without a licence. Many consumer repeaters are marketed as “authorised” under an ACMA class licence, but they must comply with technical standards. A repeater that fails to meet class licence conditions (e.g., by operating outside the permitted power or frequency) remains illegal under the Radiocommunications Act. The declaration’s exclusion could lull users into thinking their repeater is legal when it is not.

Second, the “physical contact” requirement for a booster could be satisfied by a USB cable, a cradle with direct metal contacts, or even a charging cable that also carries data for antenna feed. A device that couples wirelessly (inductive charging pad with signal relay) may not be physically contacting the phone and thus may not be a booster. The line is blurry.

Third, the prohibition on possession for the purpose of operation or supply creates a snare for honest conduct. A person who buys a booster online and has it delivered to their home may be in possession with intent to install it - that would be an offence even if they never get around to switching it on. A retailer who receives a shipment of boosters and places them on a shelf before sale is in possession for supply immediately. There is no grace period.

Fourth, the export exemption is narrow: it requires the equipment to be manufactured in Australia solely for export. Importing boosters for re-export is not exempt. Even Australian manufacturing: if the manufacturer also produces boosters for domestic sale (even a different model), the export-only exemption may not apply to those specific devices if the overall manufacturing operation is not “solely for the purpose of being exported”. This could trap manufacturers.

Fifth, the instrument uses dynamic references to the Radiocommunications (Interpretation) Determination 2025. If that determination is amended to expand or contract the definition of “mobile station” or “station”, the scope of the prohibition changes automatically. Businesses must monitor those changes. The amendment in 2025 changed the definition, potentially affecting which devices are caught.

Sixth, the declaration does not mention any civil remedies for third parties affected by interference. A person whose mobile service is disrupted by a neighbour’s booster has no private cause of action under this instrument. They must rely on ACMA enforcement, which is discretionary, or on common law nuisance.

Seventh, there is no de minimis exemption. Even a low-power booster that causes no measurable interference is prohibited. The instrument does not consider actual harm; it presumes all boosters are harmful based on Schedule 1 reasons.

Eighth, the instrument applies extraterritorially? The Telecommunications Act may extend to conduct overseas that affects Australia. An overseas seller who ships boosters to Australia may be “supplying” and liable. Enforceability is another matter.

Ninth, the instrument does not contain a sunset clause or review provision. It continues indefinitely unless revoked or amended. That creates regulatory lock-in.

Given the absolute prohibition, compliance is straightforward in principle: do not operate, supply, or possess any device that meets the definition of mobile phone booster. In practice, certainty requires careful assessment of every device in the supply chain or possession.

For suppliers (importers, distributors, retailers), the first step is to audit existing inventory. Any device that meets all six criteria of the definition must be removed from sale and destroyed or returned to the manufacturer (if overseas). Importation of such devices must cease. Training for procurement staff is essential to identify suspect devices. The exclusion for cellular mobile repeaters does not mean all repeaters are safe; suppliers must also ensure repeaters comply with the Radiocommunications Act. A prudent supplier should obtain a written legal opinion or technical assessment from a qualified engineer for any device that could be borderline (e.g., a cradle-style booster that physically connects to the phone). The ACMA may issue guidance on specific products, but this is not guaranteed.

For operators (users), compliance means not using any mobile phone booster. If you already own one, do not use it. You may lawfully dispose of it (e.g., recycle, sell to a scrap dealer for non-operation) but be careful: if you sell it to another person who will operate it, you might be supplying. The safest approach is to destroy the device. You cannot lawfully give it away for use. You could export it (if you are not a manufacturer and the device was not manufactured in Australia solely for export; but the export exemption only applies to Australian manufactured equipment for export, not to re-export of imported devices). That means re-export is not exempt from the supply prohibition; exporting is a form of supply. So you cannot lawfully ship a booster overseas unless it was made in Australia for export. Therefore, domestic destruction is the only safe option.

For individuals who have boosters bought before 24 August 2021, the prohibition applies from that date. Continued possession with intent to operate is an offence. They should stop using it immediately and dispose of it safely. A charity donation is not lawful if the charity intends to install it.

For businesses that manufacture boosters solely for export, compliance requires ensuring that the manufacturing process and documentation demonstrate the “sole for export” purpose. No domestic sales, no domestic testing beyond what is necessary for export compliance, and preferably a written export contract. Records should be kept proving all units shipped overseas. If any unit diverts domestically (even accidentally), the exemption is lost and the manufacturer may face penalties.

For online marketplaces, compliance may require proactive monitoring and removal of listings for “mobile phone booster” devices. Marketplaces that facilitate the supply of such devices may be “supplying” themselves or be liable as an accessory. The safest approach is to block all listings that match the definition, even if the seller claims the device is a repeater. Given difficulty in verifying claims, many platforms simply prohibit any booster or repeater listings to avoid risk.

There are no reporting obligations under this instrument, but the ACMA may issue directions or conduct compliance audits. Voluntary surrender of devices is possible; the ACMA may accept surrendered goods.

Finally, if in doubt, seek a binding ruling from the ACMA on whether a particular device is a mobile phone booster. The ACMA has the power under the Act to give rulings on the application of declarations. That provides legal certainty and a defence of reasonable reliance if the ruling is wrong.