{"id":"C2004A02276","name":"Coastal Waters (State Powers) Act 1980","slug":"coastal-waters-state-powers-act-1980","collection":"act","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":"75 of 1980","makingDate":null,"administeringDepartment":null,"currentVersion":{"id":7660,"registerId":"commonwealth-C2004A02276-current","compilationNumber":null,"startDate":"2026-03-30","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"Short title [see Note 1]","content":"#### 1 Short title \\[see Note 1\\]\n\n  This Act may be cited as the Coastal Waters (State Powers) Act 1980.","sortOrder":0},{"sectionNumber":"2","sectionType":"section","heading":"Commencement [see Note 1]","content":"#### 2 Commencement \\[see Note 1\\]\n\n  This Act shall come into operation on a date to be fixed by Proclamation.","sortOrder":1},{"sectionNumber":"3","sectionType":"section","heading":"Interpretation","content":"#### 3 Interpretation\n\n  (1) In this Act:\n\n> adjacent area in respect of the State means, in relation to each State, the area the boundary of which was described under the heading referring to that State in Schedule 2 to the repealed Petroleum (Submerged Lands) Act 1967 as in force immediately before the commencement of this Act.\n\n> coastal waters of the State means, in relation to each State:\n\n    (a) the part or parts of the territorial sea of Australia that is or are within the adjacent area in respect of the State, other than any part referred to in subsection 4(2); and\n    (b) any sea that is on the landward side of any part of the territorial sea of Australia and is within the adjacent area in respect of the State but is not within the limits of the State or of a Territory.\n  (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 the interpretation of this Act.","sortOrder":2},{"sectionNumber":"4","sectionType":"section","heading":"Extent of territorial sea and coastal waters","content":"#### 4 Extent of territorial sea and coastal waters\n\n  (1) For the purposes of this Act, the limits of the territorial sea of Australia shall be the limits existing from time to time, ascertained consistently with the Seas and Submerged Lands Act 1973 and instruments under that Act and with any agreement (whether made before or after the commencement of this Act) 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.\n  (2) If at any time the breadth of the territorial sea of Australia is determined or declared to be greater than 3 nautical miles, references in this Act to the coastal waters of the State do not include, in relation to any State, any part of the territorial sea of Australia that would not be within the limits of that territorial sea if the breadth of that territorial sea had continued to be 3 nautical miles.","sortOrder":3},{"sectionNumber":"5","sectionType":"section","heading":"Legislative powers of States","content":"#### 5 Legislative powers of States\n\n  The legislative powers exercisable from time to time under the constitution of each State extend to the making of:\n    (a) all such laws of the State as could be made by virtue of those powers if the coastal waters of the State, as extending from time to time, were within the limits of the State, including laws applying in or in relation to the sea‑bed and subsoil beneath, and the airspace above, the coastal waters of the State;\n    (b) laws of the State having effect in or in relation to waters within the adjacent area in respect of the State but beyond the outer limits of the coastal waters of the State, including laws applying in or in relation to the sea‑bed and subsoil beneath, and the airspace above, the first‑mentioned waters, being laws with respect to:\n    (i) subterranean mining from land within the limits of the State; or\n    (ii) ports, harbours and other shipping facilities, including installations, and dredging and other works, relating thereto, and other coastal works; and\n    (c) laws of the State with respect to fisheries in Australian waters beyond the outer limits of the coastal waters of the State, being laws applying to or in relation to those fisheries only to the extent to which those fisheries are, under an arrangement to which the Commonwealth and the State are parties, to be managed in accordance with the laws of the State.","sortOrder":4},{"sectionNumber":"6","sectionType":"section","heading":"International status of territorial sea","content":"#### 6 International status of territorial sea\n\n  Nothing in this Act affects the status of the territorial sea of Australia under international law or the rights and duties of the Commonwealth in relation to ensuring the observance of international law, including the provisions of international agreements binding on the Commonwealth and, in particular, the provisions of the Convention on the Territorial Sea and the Contiguous Zone relating to the right of innocent passage of ships.","sortOrder":5},{"sectionNumber":"7","sectionType":"section","heading":"Savings","content":"#### 7 Savings\n\n  Nothing in this Act shall be taken to:\n    (a) extend the limits of any State;\n    (b) derogate from any power existing, apart from this Act, to make laws of a State having extra‑territorial effect; or\n    (c) give any force or effect to a provision of a law of a State to the extent of any inconsistency with a law of the Commonwealth or with the Constitution of the Commonwealth of Australia or the Commonwealth of Australia Constitution Act.","sortOrder":6}],"analysis":{"issue_detection":{"absurdities":[{"type":"circular_definition","section":"3(1) - definition of 'adjacent area'","severity":"medium","reasoning":"While not strictly circular, the definition is parasitic on a repealed Act's Schedule 2, meaning the operative content of this Act depends on a document that Parliament has seen fit to repeal. Any future dispute about boundaries requires exhuming the pre-commencement text of a dead Act, creating practical and legal uncertainty. The 'as in force immediately before the commencement of this Act' qualifier compounds the problem because this Act's own commencement date is itself unfixed (s.2), creating a potential bootstrapping problem: the reference point for the definition shifts depending on when Proclamation is made.","confidence":0.72,"description":"The definition of 'adjacent area' is defined entirely by reference to a repealed Act (the Petroleum (Submerged Lands) Act 1967), frozen at the moment immediately before commencement. This creates a permanently static definition anchored to a document that no longer exists as operative law, making verification of the boundary descriptions dependent on locating historical records of a repealed instrument."},{"type":"self_contradicting","section":"3(2)","severity":"low","reasoning":"Section 3(2) uses the Royal Assent date as its temporal anchor, while s.3(1) uses the commencement date. If Royal Assent and commencement are different dates (which is structurally guaranteed by s.2), the interpretation rules and the substantive definitions are pinned to different historical moments. This is internally inconsistent within s.3 and could produce interpretive conflicts if the Acts Interpretation Act was amended between Royal Assent and Proclamation.","confidence":0.65,"description":"Section 3(2) freezes the Acts Interpretation Act 1901 at the version in force 'immediately before the day on which this Act received the Royal Assent', while section 3(1) defines 'adjacent area' by reference to the repealed Petroleum (Submerged Lands) Act 1967 as in force 'immediately before the commencement of this Act'. Since commencement is fixed by Proclamation (s.2) and may occur after Royal Assent, two different temporal reference points govern different parts of the same interpretation regime within the same section."},{"type":"other","section":"4(2)","severity":"medium","reasoning":"The practical effect is that this Act operates with a fictional 3-nautical-mile coastal waters zone while s.4(1) simultaneously directs that the territorial sea limits be ascertained from current instruments. The Act thus references two incompatible sea boundaries simultaneously: the real current territorial sea (s.4(1)) and the artificial 3nm coastal waters zone (s.4(2)). While arguably intentional policy design, it creates a legislative zone (3-12nm) that falls within Australia's territorial sea under international law but is excluded from both the coastal waters definition and, impliedly, from the full grant of state legislative power in s.5(a), producing a sovereignty gap.","confidence":0.78,"description":"Section 4(2) provides that if the territorial sea is ever extended beyond 3 nautical miles, the 'coastal waters' definition reverts to a 3-nautical-mile baseline for all purposes of the Act. Australia extended its territorial sea to 12 nautical miles via the Seas and Submerged Lands Act and proclamations thereunder. This means the 'coastal waters' definition in this Act is permanently and artificially frozen at 3 nautical miles despite the actual territorial sea being 12 nautical miles, creating a statutory zone that does not correspond to any real-world maritime boundary."},{"type":"impossible_compliance","section":"5(c)","severity":"medium","reasoning":"Legislative power is ordinarily a constitutional matter fixed by law, not an executive arrangement. By conditioning the grant of legislative competence on the existence of a Commonwealth-State management arrangement, s.5(c) creates a situation where a State law validly enacted under an existing arrangement could become constitutionally unsupported retrospectively if the arrangement is terminated by executive action. This produces a retroactive invalidity risk: State laws do not clearly lapse automatically when an arrangement ends, yet their foundational grant of power would have evaporated.","confidence":0.7,"description":"Section 5(c) grants States power to make fisheries laws applying beyond the outer limits of coastal waters, but only 'to the extent to which those fisheries are, under an arrangement to which the Commonwealth and the State are parties, to be managed in accordance with the laws of the State.' This is a grant of legislative power contingent on an executive arrangement, meaning the existence and scope of the constitutional power fluctuates with executive agreements that can be made or terminated without parliamentary involvement."}],"contradictions":[{"severity":"medium","section_a":"4(1)","section_b":"4(2)","confidence":0.82,"description":"Section 4(1) directs that the territorial sea limits shall be 'the limits existing from time to time' ascertained under current instruments, implying a dynamic and updated definition. Section 4(2) then carves out of 'coastal waters' any part of the territorial sea beyond what would exist at 3 nautical miles, effectively overriding the dynamic definition with a static historical limit for the core operative concept of the Act. The two subsections pull in opposite directions: one is ambulatory, one is frozen."},{"severity":"high","section_a":"5(a)","section_b":"7(a)","confidence":0.85,"description":"Section 5(a) grants State legislatures power to make laws as if 'the coastal waters of the State... were within the limits of the State', which functionally treats coastal waters as state territory for legislative purposes. Section 7(a) expressly provides that nothing in the Act 'shall be taken to extend the limits of any State'. These two provisions are in direct tension: s.5(a) creates a functional equivalence to extending state limits for legislative purposes, while s.7(a) denies that any such extension occurs."},{"severity":"medium","section_a":"6","section_b":"5(a) and 5(b)","confidence":0.73,"description":"Section 6 preserves international law obligations and specifically the right of innocent passage under the Convention on the Territorial Sea and the Contiguous Zone. Sections 5(a) and 5(b) grant States broad legislative power over the territorial sea including airspace above and seabed below. State laws enacted under s.5 could foreseeably impede innocent passage (e.g., through navigation restrictions, environmental regulations, or port access laws), yet s.6 merely says the Act does not 'affect' international status without providing any mechanism to police or invalidate conflicting State laws. The saving in s.6 is aspirational rather than operative, creating a gap between the broad grant of power and the preservation of international obligations."},{"severity":"low","section_a":"7(c)","section_b":"5 generally","confidence":0.6,"description":"Section 7(c) provides that nothing in the Act gives effect to a State law to the extent of any inconsistency with a Commonwealth law. However, s.5 purports to be a grant of legislative power, not merely an operational provision. If a State law made under the s.5 power is inconsistent with a Commonwealth law, s.7(c) renders the State law inoperative — effectively hollowing out the grant. This is arguably self-defeating: the Act extends State power but simultaneously preserves the Commonwealth's ability to override any exercise of that power, meaning the extension adds nothing that the States did not already have through the operation of s.109 of the Constitution."}]},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"The legislation remains tightly focused on its original purpose: clarifying and granting State legislative powers over near-shore waters. The structure and content show no significant expansion beyond the core mechanism of extending State legislative competence to coastal waters while preserving Commonwealth supremacy and international obligations. The limited extensions beyond 3 nautical miles (mining, ports, fisheries) were clearly part of the original legislative design to address practical coastal management needs."},"complexity_factors":["Nested definitions: 'coastal waters' depends on 'adjacent area' which depends on a repealed Act's Schedule 2, creating a chain of references","Temporal contingency in section 4(1): limits of territorial sea are 'existing from time to time' requiring dynamic interpretation against other legislation","Conditional exclusion in section 4(2): creates a 'frozen' 3-nautical-mile baseline even if territorial sea expands, requiring counterfactual calculation","Three distinct grants of power in section 5 with different geographic scopes and subject-matter limitations (5(a) unlimited within coastal waters; 5(b) limited subjects beyond; 5(c) fisheries only with agreement)","Savings provisions in section 7 that clarify what the Act does NOT do, requiring negative inference to understand full effect","Reference to repealed legislation (Petroleum (Submerged Lands) Act 1967) for boundary definitions, requiring historical legislative archaeology"],"plain_english_summary":"**What this law does:**\n\nThis Act gives Australian States the power to make laws for the sea areas just off their coasts — what it calls \"coastal waters\" — as if those waters were actually land within the State itself.\n\n**Why it was needed:**\n\nBefore 1980, there was legal uncertainty about whether States could make laws for offshore areas. The Commonwealth (federal government) controlled the territorial sea (the ocean up to 12 nautical miles from shore under international law). This Act carved out a specific zone — essentially the first 3 nautical miles — and said \"States, you can treat this as yours for law-making purposes.\"\n\n**Who it affects:**\n\n* **State governments** — they can now pass laws about fishing, pollution, shipping, mining, and other activities in near-shore waters\n* **People and businesses operating near the coast** — they must comply with State laws in these waters, not just Commonwealth laws\n* **The Commonwealth** — it keeps control of the broader territorial sea (beyond 3 nautical miles) and international obligations\n\n**Key features:**\n\n* **Coastal waters** are defined as the parts of Australia's territorial sea within 3 nautical miles of the coast (the \"adjacent area\"), plus any internal waters on the landward side\n* States can make laws for these waters **as if they were land within the State** — this includes laws about the seabed below and airspace above\n* States also get limited powers for areas **beyond** 3 nautical miles for specific things like:\n  * Mining that starts from land and goes under the seabed\n  * Ports, harbours, and coastal works\n  * Fisheries (but only where there's a Commonwealth-State agreement)\n* **Important limits:**\n  * This doesn't actually change State boundaries on a map — it's just about law-making power\n  * State laws still lose if they conflict with Commonwealth laws or the Constitution\n  * Australia's international obligations (like allowing innocent passage of foreign ships) remain untouched"},"summary":{"complexity_score":6,"scope_assessment":{"changed":false,"description":"The Act appears to have maintained its original scope. It was designed specifically to resolve the constitutional gap in state legislative power over coastal waters following the High Court's decisions on Commonwealth offshore power, and its provisions remain consistent with that intent. The 3 nautical mile cap built into section 4(2) anticipates and limits any scope creep from Australia's later extension of the territorial sea to 12 nautical miles."},"complexity_factors":["Requires understanding of Australia's constitutional division of powers between states and Commonwealth","Geographic definitions rely on a repealed Act (Petroleum (Submerged Lands) Act 1967), requiring cross-referencing legislation that no longer exists in its original form","Layered jurisdictional zones with different powers applying at different distances from shore","Interaction between domestic law and international law obligations (Convention on the Territorial Sea and the Contiguous Zone)","The 3 nautical mile cap concept requires understanding that Australia's territorial sea was later extended, creating a distinction between what states can and cannot control","Terms like 'adjacent area', 'territorial sea', and 'coastal waters' have technical legal and geographic definitions that differ from ordinary usage","The Act operates as a grant of constitutional power, which requires some understanding of how Australian federalism works to fully appreciate"],"plain_english_summary":"## Coastal Waters (State Powers) Act 1980\n\n### What does this law do?\nThis Act gives Australian **state governments** the legal authority to make laws covering the ocean waters just off their coastlines — areas that would otherwise fall under federal (Commonwealth) control.\n\n### The core problem it solves\nUnder Australia's Constitution, states only have lawmaking power within their own borders. The ocean is technically Commonwealth territory. This Act effectively says: *\"States can treat the coastal waters next to them as if those waters were part of the state\"* — allowing state parliaments to pass laws covering those waters.\n\n### Who does it affect?\n- **State governments**: They gain power to legislate for coastal waters (up to 3 nautical miles offshore — roughly 5.5 kilometres)\n- **Businesses and individuals** operating in coastal waters: fishing operators, port authorities, miners drilling under the seabed, shipping facilities, and anyone involved in coastal construction works\n- **The general public**: State laws about safety, environment, and commerce in coastal waters become valid and enforceable\n\n### What specifically can states now legislate about?\n1. **Coastal waters generally** (within 3 nautical miles): States can make virtually any law they like, as if the water were dry land within their borders — covering the seabed below and airspace above\n2. **Beyond coastal waters** (further out to sea): States can make more limited laws about:\n   - Underground mining that starts on land and extends under the sea\n   - Ports, harbours, shipping facilities, dredging, and other coastal works\n   - Fisheries — but only where the Commonwealth and the state have a formal agreement for the state to manage those fisheries\n\n### Important limits\n- This Act **does not** actually move state borders or change state boundaries on a map\n- **Federal law always wins**: If a state law conflicts with a Commonwealth law, the Commonwealth law prevails\n- **International law is preserved**: The Act doesn't interfere with Australia's international obligations, including ships' rights to pass through territorial waters ('innocent passage' — the right of foreign ships to travel through Australian waters peacefully)\n- The 3 nautical mile cap on full state powers means that if Australia ever extended its territorial sea beyond 3 nautical miles (it did, to 12), states don't automatically get full power over the extra distance"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This Act extends the territorial reach of State lawmaking by treating a State's coastal waters as within the scope of State laws and by authorising certain State laws to apply in adjacent waters beyond those coastal waters (s3, s5). At the same time, it preserves State boundaries (s7(a)) and does not displace Commonwealth responsibility for international obligations or Commonwealth law supremacy (s6, s7(c)). The extension is qualified by how the territorial sea limits are set and by specific subject-matter limits (s4, s5(b)–(c))."},"complexity_factors":["Cross-references to external sources and instruments (Seas and Submerged Lands Act 1973 and instruments under that Act) that determine territorial-sea limits (s4(1))","Temporal variability: limits of the territorial sea are treated as existing \"from time to time,\" so the scope of coastal waters can change without amendment to this Act (s4(1))","Conditional exclusion where the territorial sea breadth exceeds 3 nautical miles, creating a carved-out band not treated as coastal waters for some purposes (s4(2))","Multiple subject-specific extensions of State power (general coverage of coastal waters (s5(a)); specific extra-territorial application for mining and port/shipping works (s5(b)); fisheries only where a Commonwealth–State arrangement exists (s5(c)))","Tension and interaction between State lawmaking powers and Commonwealth responsibilities under international law and constitutional supremacy, preserved by savings and international-status provisions (s6, s7(c))"],"plain_english_summary":"What this Act does, in plain terms\n\n- Mechanically, the Coastal Waters (State Powers) Act 1980 gives each Australian State the power to make and apply its own laws to its “coastal waters” (as defined in s3) and, in specified circumstances, to certain adjacent waters beyond those coastal waters (s5). The Act defines “coastal waters of the State” and ties the territorial limits used to determine coastal waters to the limits of Australia’s territorial sea as they exist from time to time (s3, s4(1)).\n\n- Definitions and boundary rules: “Adjacent area” and “coastal waters” are defined by reference to a named schedule of a repealed Act (s3). The breadth of coastal waters depends on the outer limits of the territorial sea (s4). If the territorial sea is declared wider than 3 nautical miles, the Act preserves references dating from when the breadth was 3 nautical miles by excluding any newly added outer band from the meaning of coastal waters for some purposes (s4(2)).\n\n- The scope of State lawmaking powers (who decides and what they can do): Section 5 says State constitutions permit each State to make laws as if coastal waters were within State limits. That includes laws applying to the sea-bed and subsoil and the airspace above those waters (s5(a)). Section 5 also lets States make certain laws that extend into adjacent waters beyond the coastal waters for particular subjects (subterranean mining from land, ports/harbours/shipping facilities and related coastal works) (s5(b)), and—where there is a specific arrangement between Commonwealth and State—laws about fisheries in waters beyond the coastal waters to the extent the arrangement requires State management (s5(c)).\n\n- What the Act does not change or affect: It does not change State borders (s7(a)). It does not limit any pre-existing power allowing a State to make extra‑territorial laws (s7(b)). It does not allow State laws to override inconsistent Commonwealth law or the Constitution (s7(c)). The Act explicitly preserves Australia’s international law position and Commonwealth responsibility for ensuring international obligations (s6).\n\nWhy this matters (stated purpose, then practical testing against costs and incentives)\n\n- Stated purpose (as evident from the text): to extend the reach of State lawmaking so that State laws can apply in and in relation to coastal waters and certain nearby waters (s5). The text also preserves Commonwealth international obligations and existing limits on the States (s6, s7).\n\n- Who pays and who decides: States decide whether and how to exercise these powers (s5). Private persons and businesses operating in the coastal waters or in the specified adjacent waters will be subject to any State laws the States enact; compliance costs fall on those persons and businesses (inferred from s5’s application of State laws to those waters). The Commonwealth keeps ultimate responsibility for international obligations and can override inconsistent State laws (s6, s7(c)).\n\n- Incentives and behavioural effects: The Act increases the legal territory over which States can impose regulation, permitting States to regulate navigation-related infrastructure, dredging, subterranean mining from land, the seabed/subsoil and airspace above coastal waters (s5(a)–(b)). Where the Commonwealth and a State agree that State law will manage certain fisheries beyond coastal waters, States can regulate those fisheries under s5(c). These expansions create an incentive for States to adopt regulatory regimes affecting marine operations; affected commercial operators must adjust practices to comply with whichever State laws are enacted (s5).\n\n- Costs, compliance burden and bureaucratic discretion: The immediate compliance burden is on regulated parties who must follow State laws once enacted (s5). The Act itself does not set specific regulatory standards or penalties—those arise from State laws—so the scale and nature of compliance costs and administrative discretion depend on how each State legislates. The Act leaves room for administrative discretion in how States exercise their lawmaking powers (s5).\n\n- Trade-offs and opportunity costs: The Act transfers authority to States over certain maritime subjects (s5), while explicitly preserving Commonwealth international responsibilities and the supremacy of Commonwealth law (s6, s7(c)). This means regulatory power is closer to State governments and could allow tailored local law, but it may also require coordination where Commonwealth international obligations or overlapping jurisdictions exist (s6, s7).\n\n- Implementation risk and coordination needs: Because the Act ties the scope of State powers to changing territorial-sea limits (s4(1)) and to intergovernmental arrangements for fisheries (s5(c)), there is an implementation dependency on external determinations and agreements. That creates a need for coordination between Commonwealth and State governments to avoid gaps, overlaps or conflicts in law application (s4, s5(c), s6, s7).\n\nNet mechanical effect in one sentence\n\n- The Act authorises States to make laws that apply in or in relation to their coastal waters and, in specified subject areas, certain adjacent waters, while preserving State boundaries, Commonwealth supremacy on inconsistencies, and the Commonwealth’s international-law responsibilities (ss3–7)."}},"importantCases":[],"_links":{"self":"/api/acts/coastal-waters-state-powers-act-1980","history":"/api/acts/coastal-waters-state-powers-act-1980/history","analysis":"/api/acts/coastal-waters-state-powers-act-1980/analysis","conflicts":"/api/acts/coastal-waters-state-powers-act-1980/conflicts","importantCases":"/api/acts/coastal-waters-state-powers-act-1980/important-cases","documents":"/api/acts/coastal-waters-state-powers-act-1980/documents"}}