The Act intentionally integrates State and Territory enforcement regimes into Commonwealth law while preserving certain federal controls and priorities. The interaction is principally through statutory adoption, non-application clauses, priority rules, and regulatory powers.
Adopting State/Territory provisions as Commonwealth law. Section 6(1) brings into force, by operation of this Act and as laws of the Commonwealth, those provisions of a State or Territory that provide for enforcement of maintenance orders by attachment of earnings orders directed to employers. The interaction is not merely permissive; the State/Territory provisions apply "by force of this Act and as a law of the Commonwealth," and references to an employer in those provisions are read to include the Commonwealth and every Commonwealth authority. Operationally that means the State/Territory enforcement rules, definitions of earnings, procedural steps, and remedies are imported into Commonwealth law and will operate against Commonwealth payables.
Overriding locality limits. Section 6(2) removes any limitation on operation of the adopted State provisions that depends on the locality of persons, things, acts or events within the State or Territory. Where a State law, as part of its own design, applies only to matters within the State or otherwise requires certain local connections, the Commonwealth legislation disapplies that locality limitation when the provisions operate by virtue of this Act. The result is a national application of the adopted enforcement provision in relation to Commonwealth payables, regardless of locality constraints expressed in the State law.
Preserving attachments despite conflicting laws. Section 6(3) says that the provisions that apply by force of this Act have effect in respect of the attachment of moneys notwithstanding any law that, but for this Act, would prevent attachment of those moneys. This creates a direct statutory displacement of any other law that would have insulated Commonwealth payables from attachment, to the extent that the State/Territory provision has been adopted under s 6.
Non‑application default. Conversely, s 5 says that except as provided by this Act, moneys payable by the Commonwealth or a Commonwealth authority are not subject to attachment by way of enforcement of a maintenance order. That non‑application rule establishes the Act’s derogation base for other laws: unless the Act imports a State/Territory provision or unless regulations provide otherwise, Commonwealth payables are protected.
Interaction with federal statute on matrimonial causes. Section 7(2) references the Third Schedule to the Matrimonial Causes Act 1959‑1966 and prescribes how to treat a case where an attachment under that Schedule directed to the Commonwealth or a Commonwealth authority has priority over an attachment directed to the Commonwealth or the authority by virtue of this Act. In such cases, the Commonwealth must comply with the order made by virtue of this Act as if the earnings were the residue after payment under the earlier order under the Third Schedule. The interaction is therefore one of priority ordering among federal attachments.
Regulatory modifications and exemptions. Section 8 permits the Governor‑General to make regulations excluding or modifying the operation of any provisions of a State or Territory law in their application by virtue of this Act, including exempting prescribed classes of moneys. That means the executive can create carve-outs from State/Territory attachment regimes as applied under this Act, so there is an interaction between the statutory adoption and executive legislation that can expand, contract or shape the net effect of imported State/Territory laws.
Service procedures and cross-jurisdictional service. Section 8(b) enables regulations to prescribe methods for service of orders or copies on the Commonwealth or a Commonwealth authority, including service outside the State or Territory where the order was made. This addresses cross-jurisdictional procedural interaction and provides a mechanism for recognized service across State and Territory boundaries.
Definitions determining scope. The definition of Commonwealth authority in s 3 will determine whether particular public entities fall into the Act’s reach. The exclusion of incorporated companies, societies or associations from the Commonwealth authority definition interacts with other corporate and public law regimes to decide which payers become subject to adopted State/Territory attachment rules.
In short, the Act operates as a bridge between State/Territory maintenance-enforcement law and Commonwealth payers, overriding certain local limitations and interfering with other laws that would prevent attachment, while giving the executive a power to exclude or modify that bridge by regulation and prescribing service methods to manage cross-jurisdictional operation.