The document relies on a small set of interlocking legal and geographic concepts, each defined or constrained in the text. Those concepts determine the scope and limits of the State powers the Act purports to extend.

• Adjacent area in respect of the State (s 3(1)). This is a boundary-defined area, not defined afresh in the Act, but by reference to Schedule 2 of the Petroleum (Submerged Lands) Act 1967 as in force immediately before commencement. The Act therefore imports an existing, external boundary description and fixes that snapshot in time for this Act’s purposes.

• Coastal waters of the State (s 3(1)). This concept is defined as the part(s) of the territorial sea of Australia within that adjacent area (subject to s 4(2)), plus any sea landward of the territorial sea and within the adjacent area that is not within a State or Territory. The coastal waters concept thus bridges the territorial sea concept and landward internal waters where they fall within the adjacent area.

• Territorial sea limits (s 4(1) and (2)). For the Act’s operation, the limits of the territorial sea are those ascertained consistently with the Seas and Submerged Lands Act 1973 and instruments under it, and any bilateral agreement concerning the outer limit. Importantly, s 4(2) operates as a cap: if the breadth of the territorial sea is later determined to exceed 3 nautical miles, the Act excludes from the coastal waters of the State any part that would not have been within a 3 nautical mile breadth. So the Act treats the 3 nautical mile measurement as a material benchmark for the coastal waters concept.

• Legislative powers of States (s 5). The central legal construct is that each State’s constitutional law-making powers extend to making laws "as if" the coastal waters were within the limits of the State, including the sea-bed, subsoil and airspace (s 5(a)). That is a legal fiction embedded in statute to allow extraterritorial operation of State laws in specific maritime zones. The extension is qualified in s 5(b) and (c) which allow State laws to have effect beyond the outer limits of coastal waters within the adjacent area for particular purposes: subterranean mining from land within the State, ports and harbour works, and, subject to an arrangement, fisheries management.

• Relationship to international law and Commonwealth duties (s 6). The Act explicitly does not alter the international legal status of the territorial sea or diminish the Commonwealth’s obligations to ensure observance of international law, including conventions on innocent passage. Thus the Act limits itself to domestic distribution of law-making competence and acknowledges external constraints.

• Savings and inconsistency (s 7). The Act unambiguously preserves that it does not extend State boundaries, nor validates State laws inconsistent with Commonwealth law or the Constitution. It also does not affect any existing extraterritorial law-making power apart from the statutory extension made here.

• Interpretation anchor (s 3(2)). The Acts Interpretation Act 1901, "in the form in which it was in force, as amended, immediately before the day on which this Act received the Royal Assent," applies to interpreting this Act. That choice fixes the interpretive regime to a particular temporal version of a general interpretive statute.

These concepts are tightly interdependent: the area definitions imported from the Petroleum Act, the territorial sea limits governed by the Seas and Submerged Lands Act and any agreements, and the 3 nautical mile cap together determine the spatial reach of any State laws enacted under the authority the Act creates (s 3, s 4, s 5). The legislation does not itself create specific regulatory schemes for activities in those waters; it creates competence for States to legislate within those defined limits and subject to the savings and international constraints stated.

Primary decision-makers and duty-holders:

• State Parliaments and governments. The Act expressly expands the legislative competence of each State: s 5 confers statutory extension so States can pass laws applying "as if" the coastal waters were within the State limits, and can make laws about the sea-bed, subsoil and airspace. Therefore the principal actors who gain power are the State legislative and executive branches.

• The Commonwealth. The Commonwealth is affected in several ways. The instrument, in its initial provision (s 2), is a request for the Commonwealth Parliament to enact an Act in the form of Schedule 1. If adopted, the Commonwealth retains its international law responsibilities (s 6) and supremacy over inconsistent State law (s 7(c)). The Commonwealth also controls the legal definition of the territorial sea for purposes of the Act by operation of the Seas and Submerged Lands Act and bilateral agreements (s 4(1)).

Secondary practical stakeholders:

• Operators on or under the sea-bed and subsoil. The Act expressly brings the sea-bed and subsoil within the possible reach of State law (s 5(a), (b)). Entities engaged or contemplating mining operations, pipelines, cables, seabed works, or installations should expect that State legislation may regulate those matters within the coastal waters and, for certain matters, in the adjacent area beyond coastal waters (s 5(b)).

• Ports, harbour operators, dredging contractors and coastal infrastructure providers. Section 5(b) specifically permits State laws in relation to ports, harbours and other shipping facilities, and related dredging and coastal works, to have effect in waters of the adjacent area beyond the coastal waters’ outer limits. That assigns operational regulatory relevance to State law for these activities where they fall within the adjacent area.

• Fisheries managers and fishers. Fisheries regulation beyond the outer limits of the coastal waters can be made by the State only where there is an arrangement between the Commonwealth and the State that specifies that fisheries are to be managed under State laws (s 5(c)). Therefore fishers, fisheries managers, and seafood businesses operating in those waters will be subject to Commonwealth arrangements and, potentially, State law as governed by those arrangements.

• Airspace users. The Act mentions airspace above coastal waters and the adjacent area (s 5(a) and (b)), so operators whose activities concern low-level aviation, unmanned aircraft operations, or airspace-sensitive installations above those waters will be within the regulatory ambit of State law to the extent States legislate consistent with the Act.

Actors who remain decision-makers or obligations-preservers:

• International parties and obligations. The Act specifically preserves the territorial sea’s international status and the Commonwealth’s duties to ensure compliance with international law, including provisions concerning innocent passage (s 6). External actors and foreign vessels therefore remain subject to international law administered at Commonwealth level, notwithstanding expanded State law-making competence domestically.

Indirectly affected groups:

• Businesses providing services to offshore installations or ports may face regulatory overlap or uncertainty, because the Act allows State laws to apply to sea-bed and coastal works within the adjacent area even where those waters are outside the coastal waters’ outer limits (s 5(b)). Contract drafting, compliance planning and insurance arrangements for activities in those zones will need to account for potential State law application.

• Courts and administrative tribunals. Because the Act alters the permitted territorial extent of State law, adjudicators will be called on to interpret the spatial reach of State laws under s 5, the interaction with Commonwealth law (s 7(c)), and the definitional anchors in s 3 and s 4.

In summary, the Act reallocates domestic rule-making capacity in particular maritime zones in favour of the States, while leaving international status and Commonwealth supremacy intact. The practical effects will fall mainly on State legislatures and executive agencies, and on private actors whose activities occur in the sea-bed, subsoil, airspace and waters described.

The Act is primarily about powers and permissive authority, not prescriptive duties. The central rights and permissive authorities are state-centred; there are a few explicit duties and preserved obligations.

Rights and authorised powers:

• States’ legislative authority to make laws with extraterritorial application, as if coastal waters were within State limits (s 5(a)). This is an authorised expansion of the territorial scope of State constitutional powers. Practically, States gain the right to legislate about activities in the sea-bed, subsoil and airspace above coastal waters.

• States’ authority to make laws having effect in waters of the adjacent area beyond the outer limits of coastal waters for specified subject matters: subterranean mining from land within the State; ports, harbours and other shipping facilities including installations, and dredging and other works relating thereto, and other coastal works (s 5(b)). This is a tightly enumerated right for particular subject-matter areas.

• A conditional right for State fisheries laws to apply beyond the outer limits of coastal waters, but only to the extent that the fisheries are to be managed under State laws pursuant to an arrangement to which the Commonwealth and the State are parties (s 5(c)). This makes fisheries regulation contingent on intergovernmental arrangements.

Preserved duties and obligations:

• Commonwealth duty to ensure observance of international law; the Act does not affect the international status of the territorial sea or the Commonwealth’s rights and duties in relation to international agreements, specifically including the Convention on the Territorial Sea and the Contiguous Zone and the right of innocent passage (s 6). Therefore the Commonwealth retains the duty to ensure domestic measures, including State laws enacted under s 5, do not cause the Commonwealth to fail in its international obligations.

• The Act contains savings that constrain State action: it does not extend the limits of any State (s 7(a)), it does not derogate from any pre-existing power to make laws with extra-territorial effect (s 7(b)), and it does not give force to State laws to the extent of any inconsistency with Commonwealth law or the Constitution (s 7(c)). These provisions function as limits on the exercise of the new rights, ensuring State laws must respect constitutional and Commonwealth law supremacy.

Interpretive duty:

• The Acts Interpretation Act 1901, as in force (and as amended up to Royal Assent), applies to interpretation of this Act (s 3(2)). That creates a duty to apply that interpretive regime when construing terms and provisions in this Act and, by extension, when assessing the scope of rights and powers it confers.

Procedural and timing aspects that create contingent duties:

• Commencement is by proclamation (s 2 of Schedule 1), so there is an administrative obligation on the Commonwealth executive to issue a commencement proclamation before the Act takes effect. Until proclamation, the statutory rights and permissive powers in Schedule 1 have no operative effect.

Absence of express enforcement obligations and penalties:

• The Act contains no express offences, penalties or administrative enforcement mechanisms. It confers law-making power; it does not specify duties for enforcement bodies or penalties for breaches. That will be supplied by State laws enacted under the powers the Act creates. Practically, rights to legislate are accompanied by the expectation that States will create the consequential compliance duties, enforcement regimes and penalties in their own legislation.

In short, the Act creates substantive rights for States to legislate in specified maritime zones and subject areas (s 5), while explicitly preserving Commonwealth international obligations (s 6) and the constitutional/Cwlth law supremacy constraint (s 7). The Act itself imposes few operational duties; most enforcement and compliance duties must be created and carried out by the States under the new legislative competence.

The Act supplied contains no express penalty provisions, enforcement mechanisms, or agency-designation clauses. It is a competence-defining statute: it creates and clarifies where State legislative competence can reach, and leaves substantive regulatory design, compliance obligations, enforcement machinery and penalties to be inserted by the States when they exercise the delegated competence.

Implications of that omission, as the Act itself shows:

• Enforcement will occur under State law. Section 5 grants States the power to make laws in relation to coastal waters, the sea-bed and subsoil, and certain adjacent area matters. Because the Act does not itself create offences or enforcement powers, any penalties for contravention of State law in those areas must be created by the State legislatures and will be enforced under State procedural and administrative frameworks. The Act therefore shifts regulatory responsibility to States without providing centralised Commonwealth enforcement resources.

• Gaps and transitional uncertainty. The absence of enforcement provisions produces a temporal gap: until a State enacts implementing legislation specifying offences, licences, inspection powers, penalties and remedial mechanisms, there will be uncertainty as to the consequences of particular conduct in those waters. This is a mechanical effect: the State possesses the competence (s 5) but has no obligation in the Act to impose duties or penalties.

• Interaction with Commonwealth enforcement. Where Commonwealth law already regulates the subject matter, enforcement of Commonwealth obligations remains the Commonwealth’s domain, and State laws inconsistent with Commonwealth law have no force (s 7(c)). Therefore where Commonwealth enforcement regimes exist, they remain applicable and will take precedence over inconsistent State enforcement. Also s 6 preserves the Commonwealth’s duty under international law, implicating Commonwealth enforcement responsibilities to the extent necessary to comply with international obligations.

• International law constraints that can affect enforcement. Because s 6 explicitly preserves the international status of the territorial sea and the Commonwealth’s duty to ensure observance of international law, certain State enforcement measures could be constrained if they impede rights protected under international law (for example, innocent passage). Thus potential State enforcement actions need to be calibrated to avoid generating international law breaches that the Commonwealth would need to rectify.

• Judicial enforcement and remedies. Any legal disputes about the scope of State laws enacted under the authority of s 5 will fall to courts and tribunals to resolve, subject to the constitutional primacy of Commonwealth law per s 7(c). The Act itself does not stipulate forum or remedy; the normal constitutional and judicial mechanisms will apply where questions of inconsistency, validity or extent of State law arise.

• Administrative implementation risk. Because commencement is by proclamation (s 2 of Schedule 1), unless and until the Act (if enacted by the Commonwealth) commences, no enforcement or penalty regimes created under State law will be triggered by the statutory authority in this instrument. That timing dependence introduces administrative risk if stakeholders assume a synchronous roll-out of State regulatory regimes.

In summation, the Act does not provide penalties or a central enforcement framework. It delegates power without prescribing enforcement architecture, which leaves enforcement to States (subject to Commonwealth supremacy and international constraints) and creates interim uncertainty until States enact and operationalise their own regimes.

The Act is drafted to operate in a networked way with several external legislative instruments and constitutional rules. Its operative textual cross-references determine how it sits alongside and within other laws.

Inter-action with the Petroleum (Submerged Lands) Act 1967: s 3(1) defines "adjacent area in respect of the State" by reference to Schedule 2 to the Petroleum (Submerged Lands) Act 1967 as in force immediately before commencement. The Act therefore imports the boundary descriptions from that external Act and freezes them at a particular temporal version. That cross-reference means the spatial scope assigned to State powers under this Act is tied to pre-existing petroleum-related boundary demarcations.

Interaction with the Seas and Submerged Lands Act 1973 and bilateral agreements: s 4(1) makes the limits of the territorial sea, for the purposes of this Act, the limits ascertained consistently with the Seas and Submerged Lands Act 1973 and instruments under that Act, and with any agreement for the time being in force between Australia and another country with respect to the outer limit of a particular part of that territorial sea. Thus the Act defers to Commonwealth law and international agreements when fixing the outer spatial boundary used to determine coastal waters for State legislative reach.

Relation to constitutional division of powers and inconsistency doctrine: s 7(c) expressly provides that nothing in the Act gives force to a State law to the extent of any inconsistency with a law of the Commonwealth or with the Constitution. That preserves the constitutional hierarchy and the operation of the inconsistency doctrine: Commonwealth law and constitutional limitations continue to invalidate or displace inconsistent State law despite the extension of State competence authorised by the Act.

Interaction with pre-existing extraterritorial State powers: s 7(b) states that nothing in the Act derogates from any power existing, apart from this Act, to make laws of a State having extra-territorial effect. That preserves any other legal modalities under which States may extend their laws extraterritorially, so this Act is a further (not exclusive) source of extraterritorial competence.

Interpretive framework anchor: s 3(2) requires that the Acts Interpretation Act 1901, in the form in which it was in force, as amended, immediately before Royal Assent, applies to interpretation of this Act. This means interpretive norms and presumptions from the Acts Interpretation Act as it stood at that cut-off date are the primary interpretive lens. Any later amendments to the Acts Interpretation Act will not alter the interpretive regime for this Act unless and until this Act is themselves repealed or amended.

International law interface: s 6 states that nothing in the Act affects the territorial sea’s international status or the Commonwealth’s responsibilities to ensure observance of international law (explicitly noting the Convention on the Territorial Sea and the Contiguous Zone on innocent passage). Practically, that means State laws enacted under the Act must be compatible with international rights and duties which the Commonwealth is obliged to uphold; conflict with international obligations could trigger Commonwealth measures or require the Commonwealth to take steps to ensure compliance.

Consequences for administrative and regulatory overlap: Because s 5 allows State laws to operate in sea-bed, subsoil and airspace and permits certain State laws beyond the coastal waters’ outer limits in the adjacent area (s 5(b)), there is potential for overlapping regulatory regimes between State law and existing Commonwealth law governing the same activities, particularly where the Commonwealth has legislated in related fields (for example, navigation, customs, immigration, maritime safety and offshore resource management). The Act does not harmonise or prioritise detailed operational provisions; it preserves the high-level constitutional allocation (s 7(c)).

In short, the Act is deliberately structured to plug into and rely upon existing Commonwealth statutes and international agreements to define spatial boundaries and to preserve Commonwealth primacy on inconsistency and international law, while granting States domestic competence to legislate within those externally-anchored limits.

The text supplied contains no recorded amendments to the Schedule 1 model Act itself. The body of the instrument includes procedural and temporal anchors (for example, commencement by proclamation and references to other Acts "as in force immediately before commencement") but does not recite any subsequent legislative changes to the Schedule 1 provisions.

Two observations from the Act’s internal drafting are relevant to amendment risk and interpretation:

• Freezing external references. Section 3(1) refers to the "adjacent area in respect of the State" as described in Schedule 2 to the Petroleum (Submerged Lands) Act 1967 "as in force immediately before the commencement of this Act." Similarly, s 3(2) fixes the Acts Interpretation Act 1901 as "in the form in which it was in force, as amended, immediately before the day on which this Act received the Royal Assent." Those textual choices are functionally amendments of the usual rule that references update automatically: the Act deliberately freezes the relevant external provisions and interpretive framework at particular historical points. Such freezing reduces ambiguity caused by later amendments to the referenced Acts, but at the cost of potential divergence between contemporaneous law and the snapshot used by this Act.

• The Act anticipates external changes to the territorial sea. Section 4(1) ties the limits of the territorial sea to determinations under the Seas and Submerged Lands Act 1973 and instruments under that Act, and to any bilateral agreements. That means if those external instruments are amended or new agreements are made, the territorial sea limits for this Act's purposes will change accordingly unless s 4(2) intervenes. Section 4(2) then adds a specific qualification applying if the breadth of the territorial sea is determined to be greater than 3 nautical miles: it excludes from the coastal waters defined in this Act any part of territorial sea that would not have been within the limits had the breadth stayed at 3 nautical miles. That is an operational downside-protection built into the Act itself.

Because the supplied text is a Schedule that asks for Commonwealth enactment and because it contains temporal locks on external references, the practical amendment path for the regime as enacted would follow normal Commonwealth legislative procedures. However, the document before us contains no subsequent amendments, repeal history, or legislative note indicating later changes. Any researcher or practitioner must therefore treat the present text as the authoritative text provided and seek out official legislative revision histories externally if required. The Act itself offers no history or record of later amendment inside the supplied material.

The supplied material contains no litigation history, reported cases, judicial decisions, or references to disputes concerning the Act or Schedule 1. The text is a model Commonwealth Act requested by the Parliament and contains statutory provisions, preamble and definitions, but does not provide any record of judicial interpretation, challenge, or case law.

Given that absence in the source text, any statement about litigation, judicial approaches, or how courts have construed the provisions would be outside the document supplied and therefore not supportable from this source alone. Practitioners seeking binding judicial interpretation would need to consult external case law databases and official law reports concerning the Coastal Waters (State Powers) Act or the Constitutional Powers (Coastal Waters) Act 1979, as enacted, to determine whether and how courts have addressed questions such as:

• the proper construction of "coastal waters of the State" as defined via cross-reference to the Petroleum (Submerged Lands) Act Schedule 2 (s 3(1));
• the effect and constitutionality of the statutory fiction that State laws apply "as if" coastal waters were within the State (s 5(a));
• the interplay between s 5 and Commonwealth laws or international obligations preserved by s 6 and s 7;
• the effect of s 4(2) where the territorial sea breadth is determined to exceed 3 nautical miles; and
• any disputes arising from the cross-jurisdictional application of State laws to sea-bed, subsoil or airspace.

Because none of those judicial outcomes are recorded in the supplied Act text, this section records only the document’s silence: there is no litigation history contained in the source provided.

The Act’s text contains a number of drafting choices and cross-references that create concrete compliance and interpretive pitfalls for practitioners. These are not evaluative claims about policy merit; they are direct consequences of the Act’s chosen mechanics.

Frozen reference points

• The Act fixes the "adjacent area" by reference to Schedule 2 of the Petroleum (Submerged Lands) Act 1967 "as in force immediately before the commencement of this Act" (s 3(1)). That snapshot approach means later amendments to the Petroleum Act or its schedules will not update the boundaries relevant to State powers under this Act. Practitioners must therefore map coastal waters against the historic Schedule 2 boundary descriptions, not a later version. Failure to do so will produce incorrect geographic characterisations.

• The Acts Interpretation Act 1901 is applied "in the form in which it was in force, as amended, immediately before the day on which this Act received the Royal Assent" (s 3(2)). This freezes interpretive presumptions and rules to a particular temporal version. If subsequent amendments to that interpretive statute change default rules (for example, on ambiguity, retroactivity, or construction of references), those changes will not apply to this Act without amendment.

Three-nautical-mile cap

• Section 4(2) excludes from "coastal waters" any part of the territorial sea that would not have been within limits had the breadth continued to be 3 nautical miles, if the territorial sea is later determined greater than 3 nautical miles. The immediate operational risk is that the spatial extent of State law under s 5 can be materially narrower than the contemporary territorial sea, potentially creating a band of water where Commonwealth law (and not State law under this Act) is the presumptive domestic regime. Practitioners should not assume that a later extension of the territorial sea automatically expands State competence under this Act; it may have the opposite effect.

Conditional fisheries reach

• Section 5(c) makes State fisheries laws applicable beyond the outer limits of the coastal waters only to the extent that the fisheries are to be managed pursuant to an arrangement to which the Commonwealth and the State are parties. Absent such an arrangement, State fisheries laws will not have extraterritorial effect in those waters. Stakeholders should verify the existence and terms of any intergovernmental arrangements before treating State fisheries regulation as applicable.

No enforcement architecture in the Act

• The Act confers competence but does not create enforcement mechanisms, offences, licensing schemes, or administrative authorities. Until States enact implementing statutes and operational frameworks, there will be regulatory voids and uncertainty about compliance obligations and penalties. Those gaps are a practical compliance hazard.

International law and innocent passage

• Section 6 expressly preserves the territorial sea’s international status and the Commonwealth’s duty to ensure observance of international law, "in particular" the Convention on the Territorial Sea and the Contiguous Zone relating to the right of innocent passage. State laws that inadvertently impede those internationally-protected rights could trigger Commonwealth countermeasures or require legal adjustment. Practitioners drafting State laws must consider whether domestic provisions could interfere with innocent passage or other international rights.

Inconsistency survival

• Section 7(c) reaffirms that State laws inconsistent with Commonwealth law or the Constitution have no force or effect to the extent of inconsistency. This says that the extension of State legislative reach does not immunise State laws from constitutional or Commonwealth statutory invalidity. Drafters should therefore review concurrent Commonwealth statutes (for example, customs, navigation, maritime safety, and offshore resource laws) to guard against inconsistency.

Ambiguity about airspace and installations

• The Act brings the airspace above coastal waters and certain adjacent waters within the scope of State laws (s 5(a) and (b)). But it does not specify altitudinal limits or reconcile with Commonwealth air navigation and aviation safety legislation. That could create uncertainty where State and Commonwealth regimes overlap vertically.

In sum, the main gotchas derive from frozen external references, the 3 nautical mile benchmark and its excluding effect, the conditional nature of fisheries reach, the absence of enforcement detail, international law constraints, and the ongoing risk of inconsistency with Commonwealth law. Each of those consequences follows from the explicit wording of the Act and should be front-of-mind when advising clients or drafting implementing State legislation.

Compliance under the legal regime created by this Act is largely a matter of state legislative action and careful alignment with Commonwealth and international constraints. The Act itself confers power but leaves the detail to States and to intergovernmental arrangements. The following are concrete steps and checks derived from the Act’s text that legislative drafters, regulators and affected businesses should employ.

For State governments and legislative drafters

1. Map spatial scope against the frozen boundary descriptions. Use Schedule 2 to the Petroleum (Submerged Lands) Act 1967 as it stood immediately before the Act’s commencement to determine the "adjacent area" and then ascertain "coastal waters of the State" as defined in s 3(1). Do not rely on later amendments to the Petroleum Act for those boundaries.

2. Account for the 3 nautical mile rule (s 4(2)). Where the territorial sea has been or may be determined to be greater than 3 nautical miles, identify any parts that the Act excludes from coastal waters and plan regulatory design accordingly. If a State intends to regulate in zones beyond the coastal waters’ outer limits, ensure the subject matter fits within s 5(b) (subterranean mining from land; ports, harbours and related works) or that there is an arrangement under s 5(c) for fisheries.

3. Draft implementing statutes for enforcement. The Act confers competence but not penalties or enforcement mechanisms. States must enact laws that set out offences, licensing requirements, inspection and seizure powers, administrative sanctions, and judicial remedies for activities in those waters. Ensure enforcement provisions are compatible with Commonwealth law (s 7(c)) and international obligations (s 6).

4. Coordinate with the Commonwealth on fisheries arrangements. For fisheries beyond coastal waters to be regulated by State law, an arrangement between the Commonwealth and the State is required (s 5(c)). Enter negotiations and conclude formal arrangements specifying the fisheries and management modalities before relying on State law to regulate fishers in those zones.

5. Screen for inconsistency and international law impact. Run compatibility checks against relevant Commonwealth statutes (customs, immigration, navigation, environmental protection, offshore resource management, aviation) and against international obligations, in particular those referenced in s 6. Ensure State measures do not conflict with rights such as innocent passage.

6. Consider vertical regulation and aviation law overlap. If regulating airspace above coastal waters, coordinate with Commonwealth aviation regulators to avoid conflicting regimes.

For businesses and operators (ports, seabed operators, fishers, airspace users)

1. Ascertain applicable jurisdiction. Determine whether your activity is within State coastal waters (as defined by s 3 and s 4) or beyond them but within the adjacent area. Where activities fall beyond coastal waters’ outer limits, confirm whether s 5(b) or s 5(c) provides a State regulatory basis.

2. Check for State implementing legislation and compliance obligations. Do not assume the Act itself creates obligations or licences. Identify the specific State statutes, regulations and licence schemes enacted under the authority of s 5, and comply with those. Where no State law yet exists, verify whether Commonwealth law applies and comply with Commonwealth requirements.

3. For fisheries, confirm management arrangements. Before relying on State fisheries rules outside coastal waters, obtain the text of any arrangement between the State and the Commonwealth that delegates management to the State (s 5(c)). If no arrangement exists, treat Commonwealth fisheries law as the applicable regime.

4. Consider international navigation and innocent passage. Vessels, intermediaries and service providers should ensure operations do not impede rights of innocent passage and should be aware that the Commonwealth enforces international obligations (s 6).

5. Update contracts and insurance. Contracts for offshore work, dredging, installation of facilities, seabed mining and similar activities should include clauses allocating regulatory risk, jurisdictions, and compliance responsibilities, recognising that State laws may apply and that their content will be determined by subsequent State legislation under s 5.

6. Monitor commencement and legislative roll-out. Because the Schedule 1 Act and any Commonwealth enactment take effect by proclamation (s 2 of Schedule 1), and State implementing laws may follow their own timelines, monitor the dates on which statutory authorities come into force and plan compliance timelines accordingly.

For courts, regulators and advisers

1. Apply the frozen interpretive regime. When construing the Act, use the Acts Interpretation Act 1901 as it stood immediately before Royal Assent (s 3(2)). Be careful about applying later amendments to general interpretation principles.

2. Treat State laws as subject to Commonwealth supremacy. Where there is overlap, test State provisions for inconsistency with Commonwealth law or the Constitution; apply s 7(c) to displace inconsistent State law.

3. Where jurisdictional questions arise, map the precise spatial coordinates to the frozen adjacent area and to the coastal waters concept as defined in the Act to determine whether the State law was validly enacted under the authority conferred.

In sum, compliance under this framework is a combination of geographic mapping against frozen statutory references, intergovernmental coordination especially on fisheries, the drafting and enactment of implementing State legislation to provide enforcement and penalties, and careful checks for inconsistency with Commonwealth law and international obligations. The Act confers power; practical compliance requires subsequent statutory and administrative action by the States and coordination with the Commonwealth.