INTERNATIONAL ENVIRONMENTAL LAW AND ECOLOGICALLY SUSTAINABLE DEVELOPMENT
How international rules become Australian law; sovereignty and transboundary harm; ESD; climate change; marine pollution; biodiversity; and the whaling litigation.
This chapter incorporates the complete Week 3 seminar material presently supplied, together with the Week 2 tutorial learning carried forward from Chapter 2. The law, cases, treaties and statutory links have been checked against authoritative sources as at 30 September 2026. Chapter 4 will build on this foundation when the next seminar/tutorial materials are supplied.
International environmental law can look remote from ordinary Australian legal practice. It is not. Many of the rules that govern threatened species, World Heritage, migratory wildlife, ozone-depleting substances, climate obligations, marine pollution and biodiversity exist in Australian legislation because Australia has undertaken international commitments and the Commonwealth Parliament has legislated to give those commitments domestic effect. Chapter 3 therefore teaches a lawyer to move across legal levels rather than treating international and domestic law as separate subjects.
The central question is always practical: what is the environmental problem, what legal rule answers it, why does that rule bind the relevant actor, and what must the client do next?
3.1 Why environmental problems cross legal borders
Political borders are human constructs. Air pollution does not stop at a customs checkpoint. Rivers flow through several jurisdictions. Migratory animals move across national boundaries. Greenhouse gases mix in a global atmosphere. Marine pollution can travel enormous distances. A decision made within one country can therefore create environmental consequences in another country or in areas beyond national jurisdiction.
This creates a structural problem. States are sovereign, but environmental systems are interconnected. International environmental law develops rules for managing that tension. It does not abolish sovereignty. Rather, it supplies rules through which States accept duties, coordinate conduct, exchange information, prevent or reduce harm and resolve disputes.
3.2 Private international environmental disputes: jurisdiction, governing law and enforcement
Private international law, often called conflict of laws, deals with disputes involving private actors and a cross-border element. The environmental dimension does not change the core conflict-of-laws questions. The lawyer must ask which court can hear the dispute, which jurisdiction's substantive law applies, how evidence and parties can be brought before the court, and whether any judgment can be recognised and enforced where the defendant or its assets are located.
The Week 3 seminar uses the Baia Mare cyanide spill in Romania as the teaching example. A mining operation used cyanide in gold processing. A containment failure during severe weather released contaminated water into a river system and the pollution moved across national borders. The legal lesson is more important than any disputed numerical estimate of the spill: an environmental event can originate in one State, cause damage in another, involve corporations connected with a third country and leave a successful claimant with a further enforcement problem if the responsible corporate structure or assets are elsewhere.
A student should therefore resist writing, “Pollution crossed the border, so international law applies.” That is incomplete. A private claim may still be brought under domestic tort, statutory or compensation law, while conflict-of-laws principles determine the forum and applicable law.
3.3 Public international environmental law: rules between States
Public international law regulates legal relations between States and, in appropriate contexts, international organisations. Environmental disputes at this level can involve treaty obligations, customary international law, State responsibility, diplomatic processes, arbitration or adjudication before an international tribunal such as the International Court of Justice.
This distinction matters because an Australian domestic court does not become the International Court of Justice merely because facts have an international dimension. A domestic court applies Australian law within its jurisdiction. A public international law dispute between States proceeds through the international mechanisms available to them.
3.4 The three principal sources students must distinguish
| Source | What it is | Why the distinction matters |
|---|---|---|
| Treaty / convention / protocol | A written international agreement governed by international law. Treaties create binding obligations for parties according to their terms once the relevant consent-to-be-bound requirements are satisfied. | Do not assume the treaty itself is directly enforceable by an Australian citizen. Ask whether and how Australia implemented it domestically. |
| Declaration / soft law | A political or normative instrument that may articulate principles without itself having treaty status. | Soft law can influence legislation, policy and interpretation, but its legal force must not be overstated. |
| Customary international law | A rule developed through sufficiently widespread and consistent State practice accompanied by acceptance that the practice is legally required (opinio juris). | Both elements must be identified. Repeated conduct alone is not enough if States do not treat it as legally obligatory. |
3.5 Customary international law: State practice plus opinio juris
Customary international law requires two related elements: general State practice and acceptance as law, commonly expressed by the Latin term opinio juris. The second element is what distinguishes a legal custom from habit, convenience or diplomatic courtesy.
The Week 3 seminar connects this idea with Pulp Mills on the River Uruguay (Argentina v Uruguay). The International Court of Justice stated that where there is a risk that proposed industrial activity may have a significant adverse transboundary impact, the requirement to undertake an environmental impact assessment can be regarded as a requirement under general international law. The teaching significance is substantial: environmental impact assessment is not merely an Australian planning technique. In an appropriate transboundary context, assessment is part of the international legal architecture for prevention and due diligence.
Facts. Argentina challenged Uruguay's authorisation of pulp mills on a boundary river and alleged breaches of a bilateral river regime and environmental obligations.
Issue. What procedural and substantive environmental obligations applied to a project capable of transboundary effects?
Principle. The Court treated environmental assessment as part of the due-diligence framework where significant transboundary adverse impact is risked. It also distinguished procedural cooperation obligations from substantive environmental obligations.
Why it matters. It teaches students that environmental assessment, notification, cooperation and scientific evidence can have international legal significance before damage occurs.
3.6 Sovereignty is the starting point - not the end of the analysis
The seminar describes permanent sovereignty as a foundational idea. A State exercises legal authority over its territory, subject to international law. Sovereignty explains why each State ordinarily controls activities within its jurisdiction. It does not mean that the State may use its territory without regard to the rights of other States or shared environmental systems.
In the marine context, the United Nations Convention on the Law of the Sea (UNCLOS) provides the legal framework students should recognise. The territorial sea may extend up to 12 nautical miles from the applicable baselines. The exclusive economic zone (EEZ) may extend up to 200 nautical miles. The rights in an EEZ are not identical to full territorial sovereignty; they are sovereign rights and jurisdiction for purposes recognised by UNCLOS. Beyond national maritime zones, different high-seas and international regimes apply.
3.7 The no-harm principle and Trail Smelter
Sovereignty is qualified by responsibility. The classic environmental expression is the no-harm principle: a State should not allow activities within its jurisdiction or control to cause serious environmental injury to another State. The Week 3 seminar explains the idea by analogy with the common-law intuition that a landowner cannot use property in a way that unlawfully harms a neighbour.
Facts. Emissions from a lead and zinc smelter in Trail, British Columbia crossed into Washington State and caused damage.
Issue. Could Canada permit activities in its territory that produced proven cross-border injury in the United States?
Outcome and principle. The arbitral tribunal imposed responsibility in the circumstances and required control of the transboundary pollution. The case became a foundational authority for the proposition that territorial sovereignty is accompanied by obligations regarding serious transboundary harm.
Use it when. A problem involves pollution moving from one State into another, prevention of transboundary harm, State responsibility or the historical development of international environmental law.
3.8 Treaties: signature, ratification and domestic implementation are different steps
A treaty can be negotiated and signed at the international level, but students must distinguish signature from ratification and both from domestic implementation. The Vienna Convention on the Law of Treaties supplies the general treaty framework, but the central Australian constitutional point for this chapter is simpler: Australian treaties are ordinarily not self-executing. Ratification does not, by itself, rewrite domestic law or create every treaty rule as a directly enforceable cause of action for individuals.
Where domestic legal rights, prohibitions, licences or penalties are required, Parliament generally legislates. For Commonwealth environmental legislation, the constitutional source frequently includes s 51(xxix) of the Constitution - the external affairs power.
3.9 External affairs power: why Commonwealth v Tasmania matters
Section 51(xxix) gives the Commonwealth Parliament power to make laws with respect to external affairs. In environmental law its importance is illustrated by the Tasmanian Dam Case.
Facts. Tasmania sought to proceed with the Gordon-below-Franklin hydro-electric project in an area associated with Australia's World Heritage obligations. Commonwealth legislation sought to prevent conduct affecting the protected property.
Issue. Could the Commonwealth validly legislate to implement Australia's international obligations even though land and resource development were occurring inside a State?
Outcome. The High Court upheld important parts of the Commonwealth scheme. The external affairs power was central to the Commonwealth's capacity to implement Australia's World Heritage Convention obligations.
Why it matters in Chapter 3. It supplies the constitutional bridge between an international environmental commitment and binding Commonwealth domestic legislation.
3.10 Treaties and administrative decision-making: the Teoh caution
The seminar refers to the doctrine associated with Minister for Immigration and Ethnic Affairs v Teoh [1995] HCA 20; (1995) 183 CLR 273. Historically, the High Court held that ratification of a treaty could contribute to a legitimate expectation in administrative decision-making even where the treaty had not been incorporated into domestic law.
Students must not turn that proposition into “ratified treaties are Australian law.” They are not. Nor should Teoh be taught without its later context. In Re Minister for Immigration and Multicultural and Indigenous Affairs; Ex parte Lam [2003] HCA 6; (2003) 214 CLR 1, the High Court's treatment of legitimate expectation substantially limited the utility of that terminology. For environmental advice, the safe method is to identify the domestic statute and the legally mandatory considerations rather than assume an unincorporated treaty is directly enforceable.
3.11 Ozone protection: the international-to-domestic chain in one example
Ozone protection provides a clean illustration of the chapter's method. International concern about ozone depletion produced the Vienna Convention for the Protection of the Ozone Layer and the Montreal Protocol on Substances that Deplete the Ozone Layer. Australia then enacted domestic controls.
The current Ozone Protection and Synthetic Greenhouse Gas Management Act 1989 (Cth) makes the connection explicit. Section 3 states objectives that include giving effect to Australia's obligations under the Vienna Convention and Montreal Protocol, while s 69B identifies the external affairs power and relevant international agreements as part of the Act's constitutional basis.
The international instrument is not decorative background. It explains why the Commonwealth legislates, where constitutional power comes from, and how a global environmental problem becomes a domestic licensing and control regime.
3.12 From sustainable development to ESD: the Brundtland-Rio-Australia pathway
The conceptual origin of modern sustainable-development language is commonly associated with the 1987 World Commission on Environment and Development report, Our Common Future, known as the Brundtland Report. Its enduring idea is development that meets present needs without compromising the ability of future generations to meet their own needs.
The 1992 United Nations Conference on Environment and Development - the Rio Earth Summit - then produced several influential instruments, including the Rio Declaration on Environment and Development, Agenda 21 and the Forest Principles, as well as major treaty developments in climate change and biological diversity.
The Rio Declaration is soft law, not a treaty. Its importance lies in articulating principles that have influenced treaties, domestic legislation, environmental policy and judicial reasoning. Australia developed the domestic expression ecologically sustainable development (ESD), reflected in the 1992 Intergovernmental Agreement on the Environment and subsequently embedded in legislation.
3.13 EPBC Act ss 3, 3A and 136: turning ESD into operative legal reasoning
The current Environment Protection and Biodiversity Conservation Act 1999 (Cth) does more than mention sustainability. Section 3 includes promotion of ecologically sustainable development among the Act's objects. Section 3A identifies five ESD principles:
- integration of long-term and short-term economic, environmental, social and equitable considerations;
- the precautionary principle;
- intergenerational equity;
- conservation of biological diversity and ecological integrity as a fundamental consideration; and
- improved valuation, pricing and incentive mechanisms.
The distinction between an object and an operative decision rule matters. Section 136(1) sets mandatory considerations for approval decisions, including matters relevant to controlling provisions and economic and social matters. Under s 136(2)(a), the Minister must take into account the principles of ESD when considering those matters.
3.14 The precautionary principle: uncertainty is part of the legal problem
Section 3A(b) expresses the precautionary principle: where there are threats of serious or irreversible environmental damage, lack of full scientific certainty should not be used as a reason for postponing measures to prevent environmental degradation.
The principle is often misunderstood. It does not mean “ban anything uncertain.” Nor does it mean “science is irrelevant.” It means that serious environmental risk cannot be ignored merely because the evidence is incomplete. The legal decision-maker should identify the threat, assess the uncertainty, evaluate the consequences of being wrong and adopt proportionate preventative measures where the legal framework requires it.
Facts. Shoalhaven City Council proposed a link road. A licence had been granted under State fauna-protection legislation. The evidence concerning the giant burrowing frog was incomplete: the area was not treated as prime habitat and the species had not been directly observed on the project site, but evidence indicated a male call had been heard and the species could travel significant distances.
Issue. How should a decision-maker respond when the possible impact on a threatened species is serious but the scientific evidence is uncertain?
Reasoning. Stein J treated precaution as a common-sense decision principle suited to uncertainty about species population, habitat and behaviour. Lack of complete knowledge did not justify assuming the risk away.
Outcome. The licence was not granted on the material then available, while leaving open the possibility that better scientific knowledge could support a different decision later.
Why it matters. Leatch teaches the difference between prevention, where harm is sufficiently known, and precaution, where uncertainty itself is legally relevant because the possible harm is serious or irreversible.
3.15 How to apply precaution step by step
3.16 Intergenerational equity: decisions are not confined to today's impacts
Section 3A(c) describes intergenerational equity: the present generation should ensure that the health, diversity and productivity of the environment are maintained or enhanced for future generations. This principle expands the decision horizon. A project may produce immediate benefits while transferring environmental costs to people who cannot participate in today's decision.
Facts. Peter Gray challenged aspects of the environmental assessment process for the proposed Anvil Hill open-cut coal mine in New South Wales. The greenhouse analysis addressed direct mine emissions but did not adequately account for downstream emissions from burning the coal.
Issue. Could assessment stop at emissions physically produced at the mine gate?
Reasoning. The Court treated ESD, including intergenerational equity, as relevant to the statutory assessment process and required a broader understanding of environmental consequences.
Why it matters. Students learn to ask about indirect, downstream and cumulative impacts, not merely immediate site disturbance. A complete environmental assessment can require attention to consequences occurring later or elsewhere.
3.17 ESD does not always operate against development: Taralga
Environmental principles do not mechanically select one side. A renewable-energy project may itself advance long-term environmental objectives while causing local amenity, landscape or ecological impacts. The lawyer must therefore identify the statutory criteria and weigh the evidence rather than label one party “pro-environment”.
Teaching point. The Land and Environment Court considered objections to a wind farm and the broader environmental benefits of renewable energy. The case demonstrates that ESD principles can support a project where its long-term environmental benefits form part of the statutory balance.
Exam use. Use Taralga to resist the simplistic proposition that ESD always means refusing development. ESD is a disciplined framework for integrated decision-making.
3.18 Climate change: from framework convention to domestic law
Climate change illustrates layered international regulation. The United Nations Framework Convention on Climate Change (UNFCCC) establishes the foundational framework and recognises differentiated responsibilities and capabilities. The Kyoto Protocol developed quantified and market-based mechanisms for participating developed-country parties, while the Paris Agreement establishes a global framework based on nationally determined contributions, progression and review.
Students should distinguish a framework convention from later protocols or agreements. The convention establishes the institutional and legal architecture; later instruments can add or refine commitments.
3.19 Australian climate legislation: targets are not the same thing as reporting
The Climate Change Act 2022 (Cth) sets national emissions-reduction targets. Section 10(1) identifies a target of reducing net greenhouse gas emissions to 43% below 2005 levels by 2030 and to net zero by 2050.
That legislation must be distinguished from the National Greenhouse and Energy Reporting Act 2007 (Cth), which establishes a reporting framework for greenhouse gas emissions, energy production and energy consumption and supports administration of related regulatory mechanisms. One statute contains national targets; the other creates reporting and data obligations. Conflating them produces bad legal advice.
3.20 Climate adaptation in planning: today's approval can create tomorrow's hazard
Climate law is not only about reducing emissions. Planning and development law also deals with adaptation: flooding, sea-level rise, coastal erosion, heat, bushfire and infrastructure resilience. The seminar's coastal subdivision example asks whether land should be approved for development where modelling indicates serious future inundation and loss of access.
The legal technique is familiar: identify the planning statute and scheme, identify the relevant hazard policy or assessment requirement, obtain technically competent evidence, and determine whether the proposal is acceptable over the planning horizon. Precaution and intergenerational equity can explain why a decision-maker should not ignore a foreseeable future hazard merely because it may occur beyond the present owner's lifetime.
3.21 Marine pollution: international liability translated into domestic statutes
Marine oil pollution requires rapid response. International conventions allocate liability and support compensation mechanisms so that clean-up need not wait for final resolution of every fault dispute. Australian law gives effect to that architecture through several statutes rather than one generic “oil pollution Act”.
Two central Commonwealth statutes students should recognise are the Protection of the Sea (Civil Liability) Act 1981 (Cth) and the Protection of the Sea (Oil Pollution Compensation Funds) Act 1993 (Cth). Sea dumping is separately addressed through the Environment Protection (Sea Dumping) Act 1981 (Cth).
The teaching lesson is structural: identify the source of marine pollution, identify the relevant international convention, then identify the Australian implementing statute. Liability for oil carried by tankers, pollution from ships, dumping of waste at sea and emergency response do not necessarily sit in the same Act.
3.22 Biological diversity: more than counting species
The Convention on Biological Diversity (CBD) defines biological diversity broadly to include variability among living organisms and diversity within species, between species and of ecosystems. Article 1 identifies three objectives: conservation of biological diversity, sustainable use of its components, and fair and equitable sharing of benefits arising from genetic resources.
This breadth matters because environmental law is not simply a list of charismatic animals. Habitat, ecological processes, genetic variation and ecosystem relationships can be legally and scientifically important. A species may appear locally abundant yet depend on a threatened habitat, breeding area, food source or migration route.
The seminar identifies recurring causes of biodiversity loss including habitat destruction, over-exploitation, invasive species and climate change. It also emphasises two reasons biodiversity regulation is difficult: extinction and habitat loss can be irreversible, and human knowledge of ecological relationships is incomplete.
3.23 Biosphere 2 as a teaching analogy: why ecological humility matters
The seminar uses the Biosphere 2 experiment as an analogy for ecological uncertainty. The deeper lesson is not the precise number of species or engineering details; it is that humans can misjudge which ecological interactions are necessary to maintain a functioning system. Environmental decision-making therefore requires humility about incomplete knowledge.
This links directly back to precaution. If a development would remove the only known breeding habitat of a threatened species, the absence of complete knowledge about the species' ecological role does not logically prove that its loss is harmless. The legal task is to apply the governing statute and evidence without pretending that uncertainty equals safety.
3.24 International biodiversity instruments become specific domestic hooks
The CBD is broad, but biodiversity law also includes instruments directed to particular sites, habitats, species and forms of trade. Students should recognise the architecture:
| International instrument | Environmental focus | Australian legal connection to investigate |
|---|---|---|
| World Heritage Convention | Cultural and natural heritage of outstanding universal value | EPBC Act World Heritage provisions and constitutional external-affairs basis. |
| Ramsar Convention | Wetlands of international importance | EPBC Act protection of declared Ramsar wetlands. |
| Convention on Migratory Species (Bonn Convention) and relevant bilateral migratory-bird agreements | Migratory wildlife crossing national boundaries | EPBC Act listed migratory species provisions. |
| CITES | International trade in endangered species | EPBC Act wildlife-trade controls and permits. |
| International Convention for the Regulation of Whaling 1946 | Conservation and regulation of whaling | International Whaling Commission regime; Australian cetacean protection under the EPBC Act. |
3.25 Whaling: one problem, two legal pathways
The whaling material is a powerful synthesis because it shows the same environmental conduct being examined through both Australian domestic law and public international law.
Under the International Convention for the Regulation of Whaling (ICRW), the International Whaling Commission adopted a commercial whaling moratorium. Article VIII permits a contracting government to issue special permits authorising its nationals to kill, take and treat whales for purposes of scientific research. Japan relied on the special-permit mechanism for its Antarctic research programmes, including JARPA II.
The legal issue was not simply whether a permit had the word “scientific” on it. It was whether the programme was genuinely within the treaty exception when assessed against its design and implementation.
3.26 Antarctica: sovereignty claims are legally sensitive
Australia claims sovereignty over the Australian Antarctic Territory, but Antarctic sovereignty is internationally complex and is not universally recognised. The Antarctic Treaty preserves the positions of claimant and non-claimant States through Article IV while enabling peaceful use, scientific cooperation and a stable legal framework without requiring final resolution of territorial claims.
3.27 The Australian Whale Sanctuary: start with EPBC Act s 225
Part 13 of the EPBC Act contains Commonwealth cetacean protections. Section 225 establishes the Australian Whale Sanctuary. The statutory definition and application must be read carefully rather than reduced to the shorthand “3 nautical miles to 200 nautical miles”. Sections 229 and 230 form part of the offence/civil-penalty regime concerning killing or injuring cetaceans in the Sanctuary, subject to statutory exceptions and permits.
Inside Queensland coastal waters, separate State wildlife rules may also apply. The current Nature Conservation (Animals) Regulation 2020 (Qld) contains whale and dolphin approach rules, including no-approach and caution zones. Again, the professional lesson is layered regulation rather than a single universal rule.
3.28 Humane Society International v Kyodo Senpaku Kaisha: domestic enforcement
Humane Society International (HSI), an environmental organisation, sought to use Australian domestic law against a Japanese whaling company operating in waters Australia treated as part of the Australian Whale Sanctuary adjacent to the Australian Antarctic Territory. The litigation raised difficult questions of extraterritorial service, international relations, enforceability and the proper role of a domestic court.
First instance. Allsop J refused leave to serve the proceeding outside Australia. The international and diplomatic setting, including the practical enforceability of any injunction, formed part of the context.
Appeal. The Full Federal Court allowed HSI's appeal. The judicial task of applying Australian law could not simply be displaced by executive concerns about diplomatic consequences. The case returned for further steps, including substituted service.
Injunction. The Federal Court ultimately granted declaratory and injunctive relief restraining the company from conduct contrary to the EPBC Act in the Sanctuary. Enforcement remained practically difficult while the company and vessels remained outside ordinary Australian enforcement reach.
Teaching significance. A legal right and a practical remedy are not the same thing. Jurisdiction, service, enforcement assets and diplomatic context all matter after the substantive environmental prohibition has been identified.
3.29 The same controversy at international law: Whaling in the Antarctic
Issue. Was Japan's JARPA II programme genuinely “for purposes of scientific research” within Article VIII of the ICRW?
Outcome. The International Court of Justice concluded that the special permits granted in connection with JARPA II did not fall within Article VIII in the relevant respects and required Japan to revoke existing permits and refrain from granting further permits under that programme.
Why it matters. Compare this with the HSI litigation. The Federal Court proceedings concerned enforcement of Australian domestic legislation against a company. The ICJ proceeding was a State-to-State international law case brought by Australia against Japan, with New Zealand intervening. Same environmental controversy; different parties, sources of law, forums and remedies.
3.30 Bringing the whole chapter together: the international-to-domestic map
A student who remembers only a list of treaties has missed the chapter. The objective is to understand legal transmission: how an environmental problem becomes an international commitment, how that commitment can support Australian legislation, how the legislation creates concrete prohibitions or decision criteria, and how a lawyer applies those rules to a project or dispute.
3.31 Practitioner issue-spotting checklist
- Define the environmental harm. Pollution, habitat loss, greenhouse emissions, marine spill, species impact or cumulative harm?
- Locate the geography. One State, multiple States, another country, territorial sea, EEZ, Antarctic waters or global commons?
- Identify the actors. Private company, individual, Commonwealth, State, foreign State, regulator or NGO?
- Classify the source. Treaty, soft law, custom, Constitution, Commonwealth Act, State Act, regulation or case?
- Explain legal force. Is the treaty implemented domestically? What constitutional power supports the Act?
- Find the exact operative law. Section, subsection, paragraph, article, definition, exception and permit power.
- Match the authority. What case explains the provision or principle and what does it actually establish?
- Test evidence and uncertainty. What is known? What is modelled? What is missing? What expert work is required?
- Apply counterarguments. Is the impact serious, indirect, reversible, mitigable, uncertain, socially necessary or outweighed by another statutory objective?
- Advise the next lawful step. Assess, refer, obtain permit, redesign, condition, monitor, challenge, seek injunction or negotiate.
Chapter 3 FAQs - Questions
- Why is international environmental law relevant to an Australian environmental lawyer?
- What is the difference between private and public international environmental law?
- What two elements create customary international law?
- Does ratifying a treaty automatically make every treaty rule enforceable in an Australian court?
- Why is Constitution s 51(xxix) important?
- What legal work do EPBC Act ss 3, 3A and 136 perform?
- Does the precautionary principle require refusal whenever science is uncertain?
- How does intergenerational equity change environmental assessment?
- What is the difference between the Climate Change Act 2022 and the NGER Act 2007?
- Why are the HSI/Kyodo Federal Court cases different from Whaling in the Antarctic in the ICJ?
Chapter 3 FAQs - Answers
Chapter 3 Multiple Choice Questions
- Which is required for customary international law?
A. A UN General Assembly vote only
B. State practice plus opinio juris
C. An Australian regulation
D. A private contract - Which constitutional provision is especially important to implementation of environmental treaties?
A. s 51(xxix)
B. s 92 only
C. s 128 only
D. s 116 - Which statement about treaties in Australia is most accurate?
A. Ratification automatically amends every State Act
B. Treaties are always directly enforceable by individuals
C. Domestic legislation is generally required to give treaty obligations domestic legal effect
D. A treaty is merely political soft law - EPBC Act s 3A(b) expresses which principle?
A. Polluter immunity
B. Precautionary principle
C. Separation of powers
D. Common law nuisance - Which case is the giant burrowing frog authority discussed in the seminar?
A. Gray
B. Leatch
C. Teoh
D. Kyodo - What was central in Gray v Minister for Planning?
A. Nuclear waste storage
B. Whale sanctuary boundaries
C. Downstream greenhouse consequences of coal
D. Ozone-depleting substances - Which Commonwealth Act sets the national 2030 and 2050 emissions targets?
A. Climate Change Act 2022
B. EPBC Regulations 2000 only
C. Water Act 2007
D. Sea Dumping Act 1981 - Which international instrument defines the framework for law of the sea zones?
A. CITES
B. UNCLOS
C. Ramsar Convention
D. Paris Agreement - Which case is associated with transboundary smelter pollution?
A. Trail Smelter
B. Taralga
C. Cole v Whitfield
D. Teoh - What is the correct relationship between HSI/Kyodo and the ICJ whaling case?
A. They are the same proceeding
B. Both were High Court cases
C. One is Australian domestic litigation and the other is State-to-State international litigation
D. Neither concerned whaling - Which CBD objective is NOT one of the three core objectives?
A. Conservation of biodiversity
B. Sustainable use
C. Fair sharing of benefits from genetic resources
D. Automatic prohibition of all development - What is the best first response to an uncertain but potentially irreversible species impact?
A. Treat uncertainty as proof there is no risk
B. Identify the seriousness of harm, the uncertainty and proportionate preventative measures
C. Ignore expert evidence
D. Approve automatically
Chapter 3 Multiple Choice Answers
- B. Custom requires State practice plus opinio juris.
- A. Section 51(xxix) is the external affairs power.
- C. Treaties are ordinarily not self-executing domestically.
- B. Section 3A(b) states the precautionary principle.
- B. Leatch is the giant burrowing frog case.
- C. Gray concerned assessment of downstream greenhouse emissions.
- A. Climate Change Act 2022, s 10.
- B. UNCLOS.
- A. Trail Smelter.
- C. They used different legal systems, parties and forums.
- D. The CBD does not create an automatic ban on development.
- B. That is the disciplined precautionary analysis.
Chapter 3 Short Answer Questions
- Explain why sovereignty and the no-harm principle must be read together.
- Explain the difference between a treaty and a declaration such as the Rio Declaration.
- Explain why Pulp Mills matters to environmental impact assessment.
- Trace the ozone-protection pathway from international law to Australian legislation.
- Explain the exact relationship between EPBC Act ss 3A(b) and 3A(c).
- Explain what Leatch teaches about scientific uncertainty.
- Explain why Taralga is important when advising on renewable-energy projects.
- Explain why enforcement was a practical difficulty in the HSI/Kyodo litigation.
Chapter 3 Short Answer Model Answers
Chapter 3 Seminar Application Questions
Teaching note. These are original book questions constructed from the Week 3 seminar material. They are not represented as separate official Bond University tutorial questions. Attempt them before turning to the model answers on the following page.
A privately owned Australian mining company operates through a subsidiary in Country A. A containment failure contaminates a river that flows into Country B. Farmers in Country B suffer losses and the government of Country B also alleges a breach of international environmental obligations. Identify the different legal pathways that may arise and explain why private international law and public international law must not be collapsed into one analysis.
Australia ratifies a new multilateral treaty requiring protection of an internationally significant ecosystem. A developer argues that the treaty has no relevance because the project is entirely within Queensland. Explain the steps a lawyer must investigate before accepting or rejecting that argument, including the role of Constitution s 51(xxix).
A project survey records no threatened frog during two daytime inspections. A specialist later records a call consistent with the species after heavy rain and says the species may travel substantial distances from breeding habitat. The proponent says the species is “not proven to be present”. Explain how a decision-maker should reason through the precautionary principle and Leatch.
A proposed coal project quantifies operational emissions but excludes emissions from future combustion of the product. The governing statutory scheme requires ESD to be considered. Explain why Gray v Minister for Planning is relevant and what further information the decision-maker may need.
Choose one of the World Heritage Convention, Ramsar Convention, Bonn Convention/CMS, CITES or the International Convention for the Regulation of Whaling. Trace the pathway from the international instrument to the Australian legal provision or regulatory regime a practitioner would investigate.
An overseas whaling company is alleged to have taken whales in waters Australia treats as part of the Australian Whale Sanctuary, but the company has no office or assets in Australia. Explain the difference between an Australian EPBC Act enforcement proceeding against the company and a State-to-State international dispute under the whaling convention.
Chapter 3 Seminar Application Model Answers
Question 1 - Model answer
Issue. The same event can create private claims and public international law issues. The lawyer must classify each relationship before choosing a forum or rule.
Law and method. Private international law asks which domestic court has jurisdiction, which law governs, how process is served, and whether a judgment can be recognised and enforced. Public international law separately asks whether one State owes another State a treaty or customary-law obligation and whether there is a jurisdictional basis for arbitration or international adjudication.
Application. Farmers may have domestic tort, statutory or compensation claims against private corporate defendants. Country B may raise State responsibility, diplomatic or treaty issues against Country A. The existence of international environmental principles does not turn private farmers into parties before the ICJ, and the existence of domestic litigation does not exhaust any State-to-State issue.
Conclusion. Build two maps: a private cross-border claims map and a public international law map, then identify where they interact.
Question 2 - Model answer
Issue. Whether an international obligation can support Australian domestic regulation of a project located wholly within one State.
Law. A treaty is ordinarily not self-executing in Australian domestic law. The practitioner must identify whether Parliament has enacted implementing legislation and whether that law is supported by a constitutional head of power. Constitution s 51(xxix), the external affairs power, is a central source of Commonwealth legislative capacity to implement bona fide international obligations. Commonwealth v Tasmania demonstrates that the intrastate location of the physical activity does not, by itself, prevent Commonwealth regulation supported by external affairs.
Application. Identify the treaty obligation, the implementing Commonwealth Act, the exact controlling provision, the protected value or matter, the statutory trigger and any required referral/approval pathway. State approvals must be mapped separately.
Conclusion. “The project is entirely in Queensland” is not a complete constitutional answer.
Question 3 - Model answer
Issue. Whether incomplete evidence can be treated as proof that the threatened species is absent.
Law. EPBC Act s 3A(b) states the precautionary principle in the federal ESD framework. Leatch v National Parks and Wildlife Service illustrates how serious potential biodiversity harm and material scientific uncertainty can require precautionary decision-making.
Application. The daytime surveys reduce but do not eliminate uncertainty. The acoustic record, weather conditions and species movement ecology create a credible risk requiring further targeted surveys, habitat assessment, route redesign, buffers, timing controls or other proportionate measures. Precaution does not automatically mean permanent refusal, but it prevents the decision-maker from converting uncertainty into assumed safety.
Conclusion. The correct legal response is to manage the uncertainty before irreversible harm occurs.
Question 4 - Model answer
Issue. Whether an assessment that excludes downstream combustion emissions may fail to give the decision-maker legally relevant information.
Law. Intergenerational equity requires attention to future environmental consequences. Gray v Minister for Planning is important because it demonstrates that downstream greenhouse emissions may be relevant to an adequate environmental assessment where ESD forms part of the statutory decision framework.
Application. The assessment should identify and, where reasonably possible, quantify downstream emissions, disclose methodology and uncertainty, and explain how those impacts relate to the statutory test. Questions of causation, control and weight can be argued after the information is before the decision-maker.
Conclusion. Excluding downstream emissions merely because combustion occurs elsewhere can create legal risk where the statute requires a broader ESD assessment.
Question 5 - Model answer
Method. Start with the international instrument and identify the obligation or protected subject matter. Then identify the Australian constitutional source supporting implementation, the implementing statute, the exact protected category and the operative provision. For example, the World Heritage Convention connects to the EPBC Act World Heritage controlling provisions; migratory-species treaties connect to the listed migratory species regime; CITES connects to wildlife-trade controls; and the whaling convention sits alongside Part 13 cetacean protections. Do not stop at the treaty name: the practitioner needs the domestic legal hook.
Question 6 - Model answer
Issue. Domestic statutory enforcement and international State responsibility are distinct.
Domestic pathway. The NGO must identify the Australian Whale Sanctuary and the precise EPBC prohibition, establish standing and jurisdiction, serve the foreign company and seek available relief. The HSI/Kyodo litigation shows that service outside Australia and practical enforcement can be difficult even where the court grants relief.
International pathway. A dispute that the foreign State has breached the ICRW is a public international law dispute requiring State parties and an international jurisdictional basis. Whaling in the Antarctic illustrates that separate pathway.
Conclusion. Always identify the party, source of law, forum and remedy before using the label “international whaling case”.
Chapter 3 IRAC Problem Questions
An Australian-controlled mining company operates a processing facility in Country A, five kilometres from the border with Country B. Following unusually heavy rain, a waste pond overflows and contaminated water enters a river flowing into Country B. Farmers in Country B lose crops and drinking-water supplies are disrupted. There is no specific bilateral pollution treaty. Advise the company about the legal issues that must be investigated before it assumes either that only Country A law applies or that an international court will determine the dispute.
A road authority proposes a bypass through degraded woodland. No endangered frog has been visually recorded on the site for twenty years, but a qualified ecologist records a call consistent with the species and explains that adults may move kilometres from breeding habitat. The proponent argues that there is no “scientific proof” the frog is present. Advise the decision-maker on precautionary reasoning.
A company proposes a new Australian coal mine. Its environmental assessment calculates diesel, electricity and fugitive emissions from the mine but excludes emissions from combustion of exported coal because those emissions will occur overseas. The governing statute requires ESD principles to be considered. Advise whether the assessment methodology creates a legal risk.
An overseas company takes whales in waters Australia regards as part of the Australian Whale Sanctuary adjacent to the Australian Antarctic Territory. The company has no office or assets in Australia. An Australian environmental NGO wants an injunction. Advise on the domestic statutory pathway, procedural obstacles and the distinction between domestic litigation against the company and any international dispute with the company's State.
Chapter 3 Detailed IRAC Model Answers
IRAC 1 - Cross-border chemical discharge
Issue. The principal issues are whether the dispute is a private cross-border claim, a public international law dispute between States, or both; which courts have jurisdiction; which domestic law governs liability; whether customary international environmental principles are relevant; and whether a judgment can be enforced against the company or its assets.
Rule. Private international law addresses forum, governing law, service and recognition/enforcement where private parties and events span jurisdictions. Public international law separately regulates duties between States. The no-harm principle, historically illustrated by Trail Smelter, recognises that territorial sovereignty is accompanied by responsibility regarding serious transboundary environmental harm. Pulp Mills demonstrates the importance of due diligence, cooperation and environmental assessment where significant transboundary harm is risked.
Application. The company's facility and alleged failure occurred in Country A, while much of the damage occurred in Country B. A claimant may therefore explore proceedings in one or more domestic forums depending on their jurisdictional rules. The company must identify corporate entities, insurance, contractual arrangements, applicable environmental licences and tort/statutory causes of action. The absence of a bespoke bilateral pollution treaty does not prove there is no liability. Equally, affected farmers cannot simply commence an ICJ case: the ICJ adjudicates disputes between States that have a jurisdictional basis. Country B might pursue diplomatic or State-to-State avenues, while farmers pursue private claims. Evidence concerning design, rainfall foreseeability, containment capacity, warning, causation and damage will be essential.
Counterargument. The company may argue an extraordinary natural event broke causation or that it complied with domestic standards. Those arguments require factual and legal testing; compliance with one licence does not automatically answer negligence, statutory liability or transboundary responsibility.
Conclusion. The correct advice is a multi-jurisdictional investigation, not a categorical statement that one country's law or one international tribunal controls the entire dispute.
IRAC 2 - Uncertain threatened-species habitat
Issue. Whether the absence of direct visual confirmation permits the decision-maker to disregard potential serious harm to the endangered frog.
Rule. Under the precautionary principle, reflected in EPBC Act s 3A(b) and explained in authorities such as Leatch, lack of full scientific certainty should not be used to postpone preventative measures where threats of serious or irreversible environmental damage exist.
Application. The potential loss of habitat for an endangered species is capable of being serious and irreversible. Scientific uncertainty plainly exists: visual surveys have not confirmed presence, but qualified acoustic evidence and known movement behaviour support a plausible risk. The decision-maker should therefore ask what further surveys, seasonal work, habitat mapping, route redesign, buffers or conditions could reduce uncertainty and risk. The proponent's argument wrongly converts “not conclusively proven” into “not present”.
Counterargument. Precaution is not automatic refusal. If rigorous further surveys establish absence, or if redesign eliminates material risk, approval may become legally supportable.
Conclusion. The decision-maker should not approve on the assumption of no frog merely because the science is incomplete. Uncertainty must be managed through proportionate evidence and preventative measures.
IRAC 3 - Coal project and downstream emissions
Issue. Whether excluding combustion emissions creates a legally inadequate environmental assessment where ESD is mandatory.
Rule. Intergenerational equity under EPBC Act s 3A(c) and analogous State ESD provisions directs attention to future environmental consequences. Gray v Minister for Planning is a leading authority showing that environmental assessment may need to consider downstream greenhouse emissions rather than confining analysis to direct mine-site emissions.
Application. The exported coal is mined precisely so it can be combusted. Although combustion occurs overseas and separate legal questions arise about control and causation, excluding downstream emissions altogether may prevent the decision-maker from understanding the project's full climate consequences. Because the statute requires ESD to be considered, the safer legal course is to quantify or reasonably estimate relevant downstream emissions, explain methodological limitations, avoid double counting and state how the information bears on the statutory decision.
Counterargument. The company can argue overseas combustion is undertaken by independent actors and that the decision-maker's statutory jurisdiction is project-specific. That may affect the weight assigned to downstream emissions, but it does not necessarily justify withholding the information.
Conclusion. There is a material legal risk in an assessment that simply omits downstream emissions. Gray supports a broader assessment approach where ESD forms part of the statutory decision framework.
IRAC 4 - Antarctic whaling and enforcement
Issue. The issues are whether the conduct falls within the EPBC Act's Australian Whale Sanctuary provisions, whether the NGO can obtain and serve Australian proceedings on the foreign company, whether an injunction would be practically enforceable, and how this differs from an international dispute between Australia and the foreign State.
Rule. EPBC Act s 225 establishes the Australian Whale Sanctuary and ss 229-230 form part of the cetacean prohibition regime. The HSI/Kyodo litigation shows that extraterritorial service, judicial discretion and practical enforcement can become central where the respondent is foreign. The Full Federal Court held that diplomatic concerns did not simply displace the court's judicial task. Separately, a State-to-State treaty dispute proceeds under public international law, illustrated by Whaling in the Antarctic.
Application. The NGO should first establish the exact location, species, conduct and statutory prohibition. It must then address standing, originating process and service outside Australia. If ordinary service cannot be achieved, substituted service may be sought if the procedural rules permit. Even if an injunction is granted, the company may have no assets or vessels within Australian enforcement reach. That practical difficulty should be explained without confusing it with the court's power to declare and restrain unlawful conduct. Any contention that the foreign State breached the ICRW is a different legal controversy involving States and an international jurisdictional basis.
Counterargument. The respondent may contest Australian jurisdiction, sanctuary coverage, treaty-sensitive territorial assumptions, service and enforceability. Those objections require precise statutory and procedural analysis.
Conclusion. Domestic EPBC enforcement against the company and international proceedings against a State are distinct pathways. A competent adviser must identify both and never collapse them into one “whaling case”.
Chapter 3 Resources
Commonwealth of Australia Constitution Act - Federal Register of Legislation
Environment Protection and Biodiversity Conservation Act 1999 (Cth) - current authorised compilation
National Greenhouse and Energy Reporting Act 2007 (Cth)
Ozone Protection and Synthetic Greenhouse Gas Management Act 1989 (Cth)
Protection of the Sea (Civil Liability) Act 1981 (Cth)
Protection of the Sea (Oil Pollution Compensation Funds) Act 1993 (Cth)
Environment Protection (Sea Dumping) Act 1981 (Cth)
Nature Conservation (Animals) Regulation 2020 (Qld)
United Nations Convention on the Law of the Sea - UN
Trail Smelter Arbitration - UN Reports of International Arbitral Awards
Pulp Mills on the River Uruguay - International Court of Justice
Vienna Convention for the Protection of the Ozone Layer - UNEP
Rio Declaration on Environment and Development - United Nations
Convention on Biological Diversity
Convention on Migratory Species (Bonn Convention)
Antarctic Treaty - official Secretariat
International Convention for the Regulation of Whaling - IWC
Whaling in the Antarctic (Australia v Japan: New Zealand intervening) - ICJ
Commonwealth v Tasmania [1983] HCA 21
Minister for Immigration and Ethnic Affairs v Teoh [1995] HCA 20
Leatch v National Parks and Wildlife Service [1993] NSWLEC 191
Gray v Minister for Planning [2006] NSWLEC 720
Taralga Landscape Guardians Inc v Minister for Planning [2007] NSWLEC 59
Humane Society International Inc v Kyodo Senpaku Kaisha Ltd [2005] FCA 664
Humane Society International Inc v Kyodo Senpaku Kaisha Ltd [2006] FCAFC 116
Humane Society International Inc v Kyodo Senpaku Kaisha Ltd [2008] FCA 3
Blue text is used as a research pathway, not decoration. Start with the authoritative source, confirm the current provision or judgment, and then return to the narrative to understand why it matters and how to use it.