The Australia’s Foreign Relations Act and Australia’s Relationship with International Law

This article examines the consequences of the Australia’s Foreign Relations (State and Territory Arrangements) Act 2020 (Cth) (‘Foreign Relations Act’) for international law. It argues that the arrangements entered into by state, territory and local governments to which the Foreign Relations Act applies can be relevant to international law in three ways. First, they may relate indirectly to Australia’s international legal obligations. Second, they may be a means by which Australian subnational governments claim a role for themselves in governance on global issues. Third, as an exercise of diplomacy, they influence the relations Australia maintains with other nations and the way in which it participates in the international system. As the states and territories in particular become more assertive, including on international issues such as climate change, giving the Commonwealth complete control over such arrangements may impact Australia’s relationship with international law.


I Introduction
In April 2021, the Commonwealth government cancelled two memoranda of understanding between the Victorian state government and the Chinese government with respect to China's 'Belt and Road initiative' (the 'Belt and Road agreements'). 1 The decision was not unexpected and, in at least some ways, not especially controversial. The Commonwealth government is responsible for managing Australia's foreign policy and foreign relations. The Belt and Road initiative has caused controversy both within Australia and globally, and the Victorian government is the only Australian government to have signed on to the program. 2 Australia's relationship with China is one of its most important, and has become a particular source of difficulty for the Commonwealth since early 2020. 3 A decision about whether Australia should participate in a scheme such as the Belt and Road initiative might reasonably be one expected to be made at the national level. Nonetheless, the decision was significant in at least one respect. It was the first exercise of the Commonwealth's power to cancel agreements between Australian subnational governments and foreign governments, as conferred by the Australia's Foreign Relations (State and Territory Arrangements) Act 2020 (Cth) ('Foreign Relations Act').
Australian subnational governments, state and territory governments in particular, have long maintained relations of their own with foreign governments. The Foreign Relations Act gives the Commonwealth, for the first time, comprehensive control over those relations. The Foreign Relations Act has attracted a good amount of attention, much of it specifically about Australia's relationship with China. 4 Other commentary has focused on the Foreign Relations Act's impact on the balance of power between the Commonwealth and the states and territories. 5 It was introduced in the midst of Australia's COVID-19 pandemic response, which has both caused and exposed tensions in the relationship between the Commonwealth government and state and territory governments. For some, the Foreign Relations Act was a clear response to the Commonwealth's relative powerlessness in the face of state and territory assertiveness: one that gives it a 'weapon to politically bludgeon state premiers [it] doesn't like.' 6 The aim of this article is to consider instead the consequences of the Foreign Relations Act for international law and Australia's relationship with the international legal system. A connection between the Foreign Relations Act and international law has not been considered in any detail to date, and is perhaps better demonstrated by another incident. In November 2021, it was reported that the Department of Foreign Affairs and Trade ('DFAT'), acting under the Foreign Relations Act, had instructed five state and territory governments to withdraw their signatures to a memorandum of understanding authored by the 'Under2 coalition' (the 'Under2 memorandum'). 7 The Under2 coalition is a global network of subnational governments committed to action on climate change. The Under2 memorandum states the intention of these governments to 'accelerate the world's response to climate change and provide a model for broader international cooperation among nations'. 8 It affirms support of international instruments and regimes on climate change, including the temperature goals of the Paris Agreement. 9 Unlike the Belt and Road agreements, it relates explicitly to international legal norms. In some respects, the relationship between the Australian states and international law has received a great deal of attention, most notably following a series High Court decisions, culminating in the Tasmanian Dam case, 10 that confirmed the ability of the Commonwealth to implement Australia's international legal obligations without the consent of the states. 11 However, the focus of most work on the subject has been the appropriate allocation of rights and responsibilities between the Commonwealth and the states within Australia's federal system. 12 Considerably less attention has been given to the consequences of those roles from the perspective of international law. 13 In the United States, where work of this nature is more established, one longstanding view is that a federal constitutional structure is antithetical to international cooperation and participation in the international legal system. 14 This resonates in Australia. For example, the 11 year delay between Australia's ratification of the International Covenant on Civil and Political Rights 15 and its accession to the treaty's First Optional Protocol was due to disagreement between the states and the Commonwealth. 16 Some more recent work in the United States considers instead how international law can empower states in their own domestic law and policy-making. 17  to which they are themselves not parties. 18 However, there is very little work in Australia that explains this phenomenon as a matter of constitutional or international law. Subnational governments generally have limited, if any, formal role in international law. For the most part, international law recognises the national government alone as the relevant international subject and assimilates subnational governments to their national government, including for the purposes of international responsibility. 19 Some subnational governments in federal countries, such as German Länder and Swiss cantons, are given the constitutional capacity to enter into treaties. 20 It is unsettled whether the conferral of such powers creates for those subnational governments a measure of international legal personality. 21 In any case, Australian subnational governments have not been given such powers. Nonetheless, for some international lawyers, whether or not subnational governments possess formal international legal subjectivity, they have the potential to make a real contribution to the international legal system as more flexible actors better positioned to cooperate and to provide a more democratic mode of engagement with international law. 22 Cities and local governments have been a major focus of such work. 23 To account for this role, international lawyers point to nuanced ways in which subnational governments play a role in the system despite their formal exclusion: for example, by lobbying national governments and influencing lawmaking processes, 24 or by using international norms and standards as the basis for their own policies, potentially even as a tool of opposition to the national government. 25 This article considers how the Foreign Relations Act impacts Australia's relationship with international law by controlling or limiting the activities of subnational governments. Part II introduces the Foreign Relations Act. It first explains the constitutional law on the subject, and describes how, in the absence of an express prohibition or authorisation, Australian subnational governments have maintained their own foreign relations, even since prior to federation. It then sets out the context to the Foreign Relations Act's enactment, and explains how the legislation creates a markedly different approach to the management of subnational foreign relations than has been adopted in the past. Part III explains two ways in which the Foreign Relations Act is relevant to international law. First, it can apply to arrangements between subnational governments and foreign 18 governments that relate to Australia's international legal obligations. This is significant given that the Commonwealth government is internationally legally responsible for the conduct of subnational governments. Secondly, it can apply to arrangements by which subnational governments 'sign-up', in an informal sense, to international norms and standards, which they might in turn use as the basis for their own policies. Part IV considers how the Foreign Relations Act might affect Australia's relationship with international law in a more general way, by limiting the ability of subnational governments to maintain relations with other governments, and 'closing off' the nation from the rest of the world.

II Australia's Foreign Relations Act
Australian constitutional law places some clear limitations on the ability of the Australian states to play a role in foreign affairs, such as prohibiting their entry into treaties. However, the precise outer limits of their ability to conduct relations of other kinds with foreign governments have never been determined. The states and territories have stepped into this space, conducting their own foreign relations in furtherance of their interests, largely without any Commonwealth involvement. It is against this backdrop that the provisions of the Foreign Relations Act should be understood, as a marked shift from existing practice, which brings control of nearly all such activity into the Commonwealth.

A The States and Territories in International Relations
Australia's Constitution does not provide an express power for either the Commonwealth or the states to manage Australia's foreign affairs, enter into treaties or conduct diplomatic relations. This is because, at the time of federation in 1901, Australia was not an independent nation. The power to conduct Australia's external affairs remained with the British imperial government, which, it was assumed, would manage those affairs on behalf of Australia. 26 Over time, the imperial government devolved its power to manage Australia's foreign affairs to the Commonwealth, taking the position that the Commonwealth government was entitled to speak on behalf of the states. As Leslie Zines has explained, this was a policy decision on the part of the British government, which chose to 'use the analogy of a fully sovereign state and rely on the central government for all communication'. 27 Nonetheless, it was 'consistent with the political understandings, at the time of the calling of the constitutional conventions, that the colonies should be able to speak with one voice'. 28 By at least the 1940s, it was settled that Australia had international legal personality and that the Commonwealth government could conduct Australia's foreign affairs, including by entering into treaties, and sending and receiving diplomatic representatives. 29 The basis of the Commonwealth government's ability to do so is the executive power conferred by section 61 of the Constitution. 30 Some have claimed that, at the time of federation, the colonies had accrued some amount of legal personality and prerogative power to manage their own external affairs and enter into treaties, which 26 were subsequently retained by the states. 31 Others have doubted that the states ever had legal personality. 32 In any case, it now seems clear at least that only the Commonwealth has the power to enter into treaties and to conduct formal diplomatic relations, as recognised by international law. 33 Some comments from the High Court go further, and appear to suggest that the states have no power to deal with other countries at all. 34 However, the point has never been expressly determined.
In practice, the states and territories have long conducted their own foreign relations. The states have maintained representatives in the United Kingdom, in the form of Agents-General, since federation, as a continuation of earlier colonial practice. 35 They have also increasingly appointed representatives to other countries. 36 Many now have dozens of overseas offices run by agencies such as Global Victoria, Trade and Investment Queensland, and Invest NSW. 37 Their primary remit is the promotion of trade and investment ties with their major economic partners. All states and territories have international and regional engagement strategies focussed on the promotion of key industries, and cooperation on other matters such as tourism, education, and cultural exchange. 38 To further these strategies, they often enter into written arrangements with foreign government partners. Some of these arrangements are expressed in broad terms as umbrella agreements to cooperate on a range of matters and deepen ties between the two respective governments. In the parliamentary debates about the Foreign Relations Act, one member of Parliament referred to such an arrangement as coming 'disturbingly close to constituting a separate ongoing foreign policy.' 39 Speaking about Queensland specifically, international relations expert and former Australian diplomat Carl Ungerer has suggested that the states should expressly develop their own foreign policies, in the face of the Commonwealth's failure to adequately prosecute their interests overseas. 40 While state and territory governments clearly have the ability to enter into contracts and contractlike arrangements in the exercise of their functions, including with other governments, no court has considered how those arrangements sit with the Commonwealth's general responsibility for 31 Australia's external affairs. Moreover, such activities have gone largely uncontested by the Commonwealth. While these international activities are extensive, they rarely openly challenge the Commonwealth's constitutional responsibility for conducting Australia's external affairs or its foreign policy objectives. There have been some examples of disagreements between the Commonwealth and the states and territories on matters of foreign policy. For example, in 2021, the premier of Western Australia criticised the Commonwealth government's handling of its diplomatic relationship with China, a country with which Western Australia has extensive trading ties. 41 However, for the most part, the international activities of the states and territories are conducted in parallel to those of the Commonwealth government and concern the interests of the relevant state or territory specifically. 42 Until very recently there has been no requirement that the Commonwealth approve these activities or the arrangements entered into by states and territories with foreign governments. That has now changed with the introduction of the Foreign Relations Act.

B Background to the Foreign Relations Act
The Commonwealth government announced its intention to enact legislation regulating arrangements between Australian subnational governments and public universities, and foreign governments and foreign universities, in August 2020. 43 The overarching purpose of the legislation, as described by the Prime Minister at the time of its introduction into the Commonwealth Parliament, is to ensure that arrangements entered into by states, territories, local governments, and universities, are consistent with Australia's foreign policy. 44 The Australia's Foreign Relations (State and Territory Arrangements) Bill (the 'Bill') 45 was introduced into the Parliament on 3 September 2020, was passed by both houses on 3 December 2020, and commenced on 10 December 2020. 46 The legislation was influenced by a number of contemporary Australian political and geopolitical factors. In one sense, it is the latest in a series of legislative and administrative measures taken since 2017 to address foreign interference and improper foreign influence in Australian politics and society. These measures include the Foreign Influence Transparency Scheme (the 'FITS'), 47 the Security of Critical Infrastructure Act 2018 (Cth), and amendments to the foreign investment review framework requiring the assessment of certain proposed investments on national security grounds. 48 Both government and non-government members of Parliament and senators described the Foreign Relations Act as part of a suite of legislation designed to protect Australia's 'national security and sovereignty' by targeting foreign interference and improper foreign influence. 49 The particular kind of foreign interference that it targets is that 'of any nation that would seek to undermine Australian foreign affairs position by dealing with subnational governments'. 50 One government member of Parliament described the Act as necessary to counter the 'divide and conquer tactics of foreign powers', to ensure that 'our own people don't recklessly or naively give foreign governments the keys to the country'. 51 The legislation must also be understood in the context of Australia's relationship with China. The subject of China dominated debate in Parliament, 52 has been a feature of most media and expert commentary on the legislation, 53 and was a central topic of the Senate Foreign Affairs, Defence and Trade Legislation Committee's ('Senate Foreign Affairs Committee') inquiry into the Bill. 54 Despite the Commonwealth government's claim that the Act is 'country agnostic' and 'agreement agnostic', 55 the Belt and Road agreements were widely assumed to be its intended targets. 56 The FITS was established following sustained media coverage of alleged instances of Chinese The Bill was also introduced into the Parliament in the midst of the COVID-19 pandemic, the response to which in Australia has concentrated attention on relations between the Commonwealth and state and territory governments. On one view, Australia's response to the pandemic has been characterised by a relatively high level of coordination between the Commonwealth and state and territory governments. 61 However, it also created and exposed tensions in inter-governmental relations. Some notable examples were the decision of some state and territory leaders to impose border closures in respect of their own states and territories despite Commonwealth opposition; 62 the Commonwealth government's sustained criticism of the lockdown measures imposed by particular states; 63 and state government criticism of the Commonwealth's management of its vaccination program. 64 State and territory governments and leaders attained a level of political and popular relevance that has challenged traditional federal dynamics, as power ostensibly shifted away from the centre. 65 At the same time, despite its early leadership, the Commonwealth was either forced, or chose, to adopt a relatively passive role in managing the crisis. 66  Act, introduced only 6 months into the pandemic response, gave the Commonwealth the ability to assert itself on subject matter fairly firmly within its constitutional and political remit. The Act also applies to arrangements entered into by Australian public universities. The Commonwealth government has demonstrated particular concern about the risk of foreign interference in the university sector. However, the justification that has been given for the Foreign Relations Act as an addition to existing schemes targeting foreign influence is a separate need to ensure consistency of foreign policy across all levels of government. 67 While public universities are constituted under the laws of the states and territories, they are not governmental entities. There was some suggestion in the testimony heard by the Senate Foreign Affairs Committee that the decision to include public universities in the ambit of the Foreign Relations Act was made after the scheme, originally meant to regulate subnational entities, was first conceived. While DFAT met with state and territory governments in the lead up to the Bill's introduction to Parliament to discuss arrangements of concern, no consultation occurred with universities. 68 During questioning in Senate Estimates, DFAT representatives said that, when they were first advised of the Bill, its scope envisaged subnational government entities. 69 They were unable to give a precise date at which the decision to include universities within the scope of the Bill was made. 70 In any case, while the Foreign Relations Act's application to universities raises a number of particular issues, relating, for example, to academic freedom and the relationship between the government and the higher education sector, it will not be the focus of this article.

C Overview of the Foreign Relations Act
The Foreign Relations Act creates a legislative regime that applies to all written arrangements between, on the one hand, Australian state, territory and local governments, and public universities ('state and territory entities'), and, on the other, foreign governmentsboth national and subnationaland foreign universities lacking 'institutional autonomy' ('foreign arrangements'). 71 It has three main areas of operation. First, it requires all state and territory entities to notify the Commonwealth Minister for Foreign Affairs and Trade ('the Minister') before they enter into a foreign arrangement. In the case of arrangements between state and territory governments and foreign national governments specifically ('core foreign arrangements'), the state or territory government must also notify the Minister before it commences negotiating such an arrangement. 72 The Minister must give approval before a state or territory government can commence negotiating a 'core foreign arrangement', 73 and again before it can enter into the arrangement. 74 In all other cases, the Minister does not have to give express approval, but can prohibit negotiation of, or entry into, an arrangement. 75 Second, it required all state and territory entities to notify the Minister of any foreign arrangements already in effect at the time that the Act entered into force by a prescribed deadline in 2021. 76 The Minister is required to list all arrangements of which they have been notified on a public register. 77 At the time of writing, that register listed nearly 3800 arrangements. Third, the Minister can make a declaration in respect of any arrangement that is already in force, rendering the arrangement invalid, not in operation, or requiring its termination. 78 The Minister can exercise this power even if they have previously approved the arrangement, or decided not to prohibit it. 79 This was the power used to declare the Belt and Road agreements to be no longer in operation.
The Foreign Relations Act does not prohibit any particular type of foreign arrangements. In fact, there was some indication in the parliamentary debates about the Bill that the legislation is intended to facilitate, rather than limit, the cultivation by subnational governments of relations with foreign governments. The Second Reading Speech refers to the 'important contributions that state, territory and local government entities make to advancing Australia's foreign policy', which are a 'useful and productive part of Australia's huge breadth of international engagement'. 80 It refers to the potential for the Commonwealth to 'leverage these relationships to further our national objectives in our international engagements'. 81 According to the Explanatory Memorandum, the Foreign Relations Act is not intended to 'prohibit, restrict or discourage State/Territory entities from engaging with foreign governments', but is actually designed to 'support the States and Territories in undertaking effective, appropriate and informed international engagement'. 82 It describes the Foreign Relations Act principally as a 'legislative scheme for Commonwealth engagement' with state and territory foreign arrangements. 83 Nonetheless, if the aim of the Foreign Relations Act is to ensure collaboration between national and subnational entities, it is unclear that it has been drafted in a way that will necessarily achieve this. Although the Minister must report annually on steps taken to engage with subnational entities 84a provision added to the Bill by amendment proposed by the opposition 85there is no requirement or process established in the Foreign Relations Act for regular consultation between subnational governments and the Commonwealth. In particular, there is no specific obligation for the Minister to engage with a state or territory entity before making a decision in respect of an arrangement to which it is a party. A dedicated taskforce has been established within DFAT to 73 oversee the scheme, including to engage with the entities to which the Foreign Relations Act applies. 86 However, the level of engagement to be conducted remains formally within the discretion of the Minister under the provisions of the Foreign Relations Act. Some proposals for the management of subnational foreign relations in other jurisdictions have adopted a more institutionalised approach to consultation. For example, a Bill introduced into the United States Congress in 2019 proposed the establishment of an Office of Subnational Diplomacy, to support the states in undertaking foreign relations of their own in a way compatible with national foreign policy objectives. 87 Although part of the Office's role would be to align subnational priorities with foreign policy goals, it would not have a federal veto right over subnational arrangements. Instead, the Bill establishes an institutional framework within which consultation on such matters can occur. The proposal does not deny the security concerns created by the decentralisation of diplomacy, including with respect to subnational engagement with China. 88 In fact, as with the Australian legislation, there is a strong indication that the Bill is intended above all to deal with Chinese influence at the subnational level. 89 However, the proposed solution is to increase the capacity of subnational governments to confront these concerns, including by embedding federal experts within those subnational entities to advise them on such issues. 90 While the Bill is still before Congress, in October 2022, the United States Department of State appointed its first Special Representative for Subnational Diplomacy to integrate local concerns into national foreign policy and foster the diplomatic activities of subnational governments. 91 There are other aspects of the Foreign Relations Act that state and territory entities have suggested are more likely to limit than facilitate subnational foreign relations. First, the Foreign Relations Act applies to any written arrangement between the relevant entities, whether or not it is legally binding, and whatever its subject matter. 92 This could include memoranda of understanding, strategic partnerships, and even email exchanges, 93 meaning the requirements of the legislation will apply to virtually all conduct involving state and territory entities and foreign governments. Second, the test against which the Minister is to consider each arrangement asks whether the arrangement would adversely affect Australia's foreign relations or be inconsistent with Australia's foreign policy. 94 The term 'Australia's foreign relations' is not defined, and the term 'Australia's foreign 86 policy' is defined so broadly that, according to one Senate committee, it essentially gives the Minister an 'unfettered discretionary power.' 95 The only requirement is that the Minister be satisfied that the relevant policy is the Commonwealth's policy on Australia's foreign relations or things outside Australia. 96 The policy does not need to be written or publicly available, and does not need to be formulated, decided upon or approved by any member or body of the Commonwealth. 97 Some state and territory entities have pointed out that this definition gives the Minister a wide-ranging discretion in their assessment of foreign arrangements that cannot be tested against any meaningful criteria. 98 Finally, the Foreign Relations Act does not provide for merits review of any decisions made under it, and such decisions are excluded from judicial review under the Administrative Decisions (Judicial Review) Act 1977 (Cth). 99 While certain constitutionally-entrenched rights to judicial review are preserved, 100 the Minister is not required to observe any requirements of procedural fairness in making decisions under the Foreign Relations Act. 101 This means that there is no requirement that the Minister put to the relevant state and territory entity any matter they propose to rely on in making their decision, or provide reasons for their decision. 102 In practice, this might significantly curtail the ability of a person or entity subject to an adverse decision to seek judicial review of that decision, or to learn about factors likely to influence the exercise of the Minister's powers under the Foreign Relations Act.

III Foreign Arrangements and International Norms
The term 'foreign arrangement' is defined broadly in the legislation to refer to any written arrangement, agreement, contract, understanding or undertaking between (relevantly) a state, territory, or local government and a foreign government. 103 The definition is not limited in any way by reference to the content of the arrangement. It does not specify whether the arrangement can or should deal with international law concepts, standards or norms. The only guidance provided on this point in any of the legislative materials is found in the Explanatory Treaties or other arrangements governed by public international law will not fall within the definition of arrangement because Australian States and Territories do not possess the power to enter into a treaty or arrangement that would be binding under public international law. This is within the exclusive responsibility of the Commonwealth.
As a matter of constitutional law this statement is correct, and was not contested by any member of Parliament, any submission to the Senate Foreign Affairs Committee inquiry into the legislation or in any of the commentary. While there was some debate about the extent to which state and territory governments are constitutionally permitted to engage in foreign relations activity of other kinds 105a point on which, as described above, there is little constitutional doctrineit is settled that only the Commonwealth has the power to enter into treaties, being legally binding agreements governed by public international law. Treaties are not the only type of agreement or arrangement that might deal with, or be relevant to, international law. Yet none of the Foreign Relations Act, the Explanatory Memorandum, or the parliamentary debates and inquiries mentions the term 'international law' in any other context. This section considers how the foreign arrangements to which the Foreign Relations Act applies might nonetheless be relevant to Australia's international legal obligations or otherwise engage with international legal norms and standards.

A The Trade and Investment Activities of States and Territories
The Commonwealth parliamentary debates make clear that the activities of subnational governments most expected to attract the exercise of the Minister's powers under the Act are those relating to the protection and fulfilment of their economic interests. By reference predominantly to the Belt and Road agreements, the debates demonstrate that an overarching purpose of the legislation is to ensure that the foreign trade and investment activities of states and territories do not invite foreign interference, or affect Australia's strategic concerns and interests. 106 A number of politicians drew a distinction between the economic interests of states and territories and the sovereign interests of Australia as a nation, and argued that the justification for the legislation lay in the fact that 'sovereignty can and should outweigh money'. 107 These comments cast the activities of the states and territories as those of private economic actors. One opposition member of Parliament likened the global activities of subnational governments to those of 'tech companies', the 'Fortune 500' and 'independent entrepreneurs', comparing subnational governments such as states and territories to corporations such as Apple. 108 The limited contribution that subnational governments made to the debate similarly indicates that their trade and investment activities were front of mind when considering the Foreign Relations Act's application. In its submission to the Senate Foreign Affairs Committee inquiry into the legislation, the New South Wales government supported the general intent of the legislation, but called for some amendments to reflect the fact that international arrangements are key to securing its economic prosperity, and should not produce unintended economic consequences. 109 The submission of the government of the Northern Territory also described its foreign arrangements as a 'bedrock to advancing trade and investment opportunities for Territory businesses'. 110 The Victorian government's response to the declaration made in respect of the Belt and Road agreements stated simply that 'Victoria will continue to work hard to deliver jobs, trade and economic opportunities for our state'. 111 Even if the application of the Foreign Relations Act was limited to agreements of this kind, it is artificial to imagine that a clear distinction can be drawn between the trade and investment activities of state and territory governments and the nation's international law obligations. As the range of matters subject to international legal regulation expands, so too does the potential for their overlap with matters traditionally within the domain of subnational governments. Moreover, some work considers explicitly the possibility that subnational governments, particularly cities, will act contrary to international norms and standards in their quest to establish overseas commercial ties and attract investment in the form of foreign capital: a regulatory 'race to the bottom' occasioned by jurisdictional competition. 112 This is particularly important given that subnational governments, unlike private economic actors, are assimilated to the central government for the purposes of state responsibility. 113 If a state or territory government acts contrary to international law, it is Australia that will be held internationally responsible. 114 For example, in 2013 the World Trade Organization ('WTO') Appellate Body upheld an earlier Panel ruling that the government of Ontario's renewable energy feed-in-tariff program breached Canada's obligations under certain of the WTO agreements. 115 State and territory governments have caused Australia to breach its international obligations in the past by their legislation. 116 Where a state's legislation places Australia in breach of international law, section 109 of the Constitution ensures that legislation enacted by the Commonwealth on the relevant subject will prevail over the state legislation to the extent of any inconsistency. 117 However, no equivalent constitutional provision ensures the ability of the Commonwealth to take similar steps with respect to unlegislated state arrangements with foreign governments that might similarly implicate 109  Australia's international obligations. It was unclear in debates about the Foreign Relations Act whether such a use was envisaged for the legislation. One submission to the Senate Foreign Affairs Committee's inquiry into the legislation raised the possibility that a Commonwealth government committed to a zero emissions target could use the legislation to prohibit any arrangement that might contribute to increased greenhouse gas emissions. 118 This might be significant given that many of the foreign activities of at least certain states relate to the promotion and development of their resources sectors. For instance, the Public Register lists a 2011 arrangement between the Western Australian government and China, the first memorandum of cooperation signed by China's National Development and Reform Commission with a subnational government, committing the governments to, among other things, encouraging Chinese companies to engage in resource exploration and development in Western Australia and investing in infrastructure required for resource development. 119 The arrangement was expressly identified by the Western Australian government as one that might be subject to a declaration under the Foreign Relations Act. 120 Another example of such an agreement is a 2011 memorandum of understanding between the government of Queensland and the Japan Bank for International Cooperation ('JBIC') intended to facilitate JBIC support of the business activities of Japanese companies in Queensland's resource sector. 121 There is nothing in either of these arrangements that contravenes Australia's international obligations. However, the Commonwealth government made a net zero emissions commitment as part of Australia's 'nationally determined contribution' to the aims of the Paris Agreement in 2021. 122 There is growing doubt that continuing exploitation of fossil fuel resources is consistent with the achievement of such an outcome. 123 The assessment of 'Australia's foreign policy' and 'Australia's foreign relations' under the Foreign Relations Act may involve consideration of Australia's international legal obligations, but the legislation itself does not require that it do so. Without more extensive definitions of the term, more substantial advice from the Minister, and more transparent information about the operation of the Foreign Relations Act, it is not possible to know.

B Transnational Governance Networks
The provisions of the Foreign Relations Act may also apply to foreign arrangements by which state and territory governments engage directly with international norms and international legal regimes.
One example of such an arrangement is the Under2 memorandum described earlier. The basis for the Minister's decision with respect to the Under2 memorandum was apparently a failure to notify the Commonwealth of the arrangement, to which the state and territory governments were already signatories at the time of the Foreign Relations Act's entry into force, rather than a ruling on its content. It appears from the Public Register that approval was subsequently given for at least some states to re-enter the arrangement. 124 Nonetheless, the incident demonstrates that the Foreign Relations Act applies to arrangements that allow subnational governments to engage explicitly with international law norms and standards, potentially in ways that challenge or openly oppose the position of the Commonwealth government. In contrast to the Victorian government's muted response to the cancellation of the Belt and Road agreements, the Victorian Minister for Energy, Environment and Climate Change labelled the decision with respect to the Under2 memorandum 'egregious' and called those responsible 'vandals.' 125 Networks such as the Under2 coalition give subnational governments the opportunity to play a role in global governance and engage directly with international norms. The number of such networks is rapidly growing. The most studied of these are city networks, which Michele Acuto and Steve Rayner have defined as 'formalized organizations with cities as their main members and characterized by reciprocal and established patterns of communication, policy-making and exchange.' 126 One estimation in 2016 suggested that there might be 200 city networks globally. 127 Another in 2018 put the number at over 300. 128 They range in size from small local or regional networks to global networks with thousands of members. 129 Australian local governments, for example, are members of the World Organization of Cities and Local Governments ('UCLG'), ICLEI -Local Governments for Sustainability, and the C40 Cities Climate Leadership Group. City networks have gained prominence most notably due to their activism on climate change, but they deal with a range of subjects, including sustainability, migration, poverty, gender and inequality, energy, economic issues, public health and peacebuilding. 130 Some are specialised, but many work across a variety of topics, functioning as a general forum for policy development. 131 Such networks can provide practical assistance to subnational law and policymakers, in the sense of information and expertise sharing. However, they can also play a policy development or regime building role. Their output often takes the form of nonlegally binding written instruments, such as declarations, action plans and compacts. 132 Such arrangements, as is now apparent, would fall under the Foreign Relations Act.
Subnational governance networks can directly influence international institutions and the development of international law. For example, the UCLG successfully lobbied for the inclusion of sustainable development goal 11 on 'Sustainable Cities and Human Settlements'. 133 The UCLG also influenced the drafting of the Global Compact on Migration adopted by the United Nations General Assembly in 2018. 134 Michele Acuto has described how this influence is the result of both top-down processes and subnational governments' own initiative. 135 International organisations such as the United Nations and the World Bank, and regional organisations such as the European Union, increasingly address themselves to subnational governments, on occasion making room at the table for their participation in traditionally nation state-centric fora. 136 For example, the United Nations has partnered with ICLEI -Local Governments for Sustainability in its work on sustainability issues. 137 Helmut Aust has argued that, by entering into non-binding agreements with the World Bank, the C40 Cities Climate Leadership Group is able to influence the standards that are adopted by the World Bank in its agreements with other entities. 138 At the same time, subnational governments actively seek to assert their role by adopting policy frameworks meant to influence existing international regimes. 139 Governance networks are often the vehicle by which such a role is established. Governance networks can also shape international law and policy-making indirectly, by allowing for the development of norms and standards on a range of global issues from the 'bottom-up'. 140 Janet Levin and Hari Osofsky have described the process of bottom-up lawmaking as one in which a community of diverse actors 'coalesce around shared, on-the-ground experiences and perceived self-interests', that, over time, assume normative significance and harden into law. 141 Governance networks provide a forum for these norms and standards to be diffused horizontally, amongst their members. 142 Through the networks' interactions with national governments, international organisations and other entities, those norms can then ultimately be diffused upwards, to influence international policy-making. 143 In this way, governance networks not only provide a forum for the sharing of information and expertise, and a vehicle for lobbying and the exertion of influence, but they also play a 'jurisgenerative role,' 144 allowing subnational governments to function as part of a 'norm-generating community'. 145 They provide a space for the concretisation of standards developing at the subnational level, and facilitate their translation to the international level. Such an understanding of the role of governance networks is consistent with theoretical approaches to international law and lawmaking that consider more generally how non-state, sub-state and suprastate actors make normative contributions to the corpus of international law even while acting outside international law's formal structures and processes. 146 While most contemporary work on the subject of governance networks is about cities and local governments, the same principles can be applied to networks involving regional or sub-federal governments. Australian states and territories are part of governance networks, such as the Under2 coalition, and the Network of Regional Governments for Sustainable Development. 147 Moreover, they are active participants in these networks. For example, a number of Australian states and territories sit on the Under2 coalition steering group. 148 New South Wales, South Australia and the Australian Capital Territory have announced the formation of a net zero emissions policy forum for subnational governments, an initiative supported by the Under2 coalition, which is intended to attract a global membership. 149 If the states and territories continue to seek a more pronounced role in governance on issues such as climate change, engaging with other governments and with international institutions may become an essential tool by which they do so. Notably, state and territory governments signed a series of instruments and declarations concluded in connection with the 26 th Conference of the Parties to the United Nations Framework Convention on Climate Change 150 ('COP26') in 2021. These included a 'Declaration on Accelerating the Transition to 100% Emission Cars and Vans' signed by the governments of Victoria, New South Wales, Tasmania, 151 South Australia and the ACT; 152 a 'Global Coal to Clean Power Transition Statement' signed by the ACT government; 153 and the 'Further, Faster, Together: Under2 Leaders Action' declaration, signed by the NSW government. 154 At the time of writing, the latter two were listed as 'not in operation' on the Public Register.
It is unclear the extent to which the Foreign Relations Act will limit subnational foreign activity, and thereby the opportunities for such engagement. The Foreign Relations Act does not prohibit foreign arrangements of any particular kind. However, subnational governments have raised concerns that the broad nature of the Minister's discretion under the Foreign Relations Act, the vague definitions of its operative provisions, the lack of any review rights, and the administrative burden created by the scheme may have a chilling effect on subnational foreign engagement. 155 If this proves true, the Foreign Relations Act could become, whether deliberately or inadvertently, a means of limiting the ability of Australian subnational governments to engage with international law.

IV Subnational Diplomacy and International Cooperation
The diplomatic activities of state and territory governments play a role in Australia's relationship with international law in another sense: by constituting Australia as an international actor and influencing the way in which it interacts with the outside world, including with the international legal system. One of the fundamental purposes of the international system is to ensure cooperation between States. 156 This purpose is enshrined in numerous international legal duties of cooperation. In the MOX Plant case, Judge Wolfrum concluded that the 'duty to cooperate denotes an important shift in the general orientation of the international legal order … it balances the principles of sovereignty of States and thus ensures that community interests are taken into account vis-à-vis individualistic State interests.' 157 Duties of cooperation generally require States to have regard to, or at least demonstrate an awareness of, the interests and concerns of other States. 158 However, other actors, including subnational governments, can play a role in creating and maintaining the underlying conditions for inter-State cooperationand, at times, in complicating prospects of such cooperation.
The 'law of cooperation' adopts a regulatory approach that prioritises communication and coordination between States. 159 It requires the establishment of international institutions and treaty frameworks to facilitate the ongoing engagement between States necessary to ensure effective governance. 160 These processes ensure that States understand their relations with one another in terms of their relative global interdependence. The 'law of cooperation' therefore depends on robust relations and exchange, to create an 'international community' whose members are 'imbued with a collective consciousness which subsumes individual awareness'. 161 This is especially the case to the extent that international law purports to regulate matters of 'common interest' or 'common concern' to the international community as a whole: matters in which all States have an interest, but which none can effectively address alone, 162 such as climate change and the protection of biodiversity. They are borne of 'a consensus according to which respect for certain fundamental values is not to be left to the free disposition of States individual or inter se but is recognized and sanctioned by international law as a matter of concern to all States'. 163 Common interest issues have their origins in the individual interests of the relevant States, but their protection relies on the agreement and coordination of the States concerned. 164 In this sense, diplomacythe maintenance of channels of communication and contact between political communities generallyis fundamental to the 'law of cooperation'. It is essential in both ensuring order and stability in international relations, 165 and in facilitating an awareness of common interests and common values. 166 Entities other than States can and do engage in diplomacy, in the general sense of the maintenance of relations between political communities. Diplomacy as an institution long pre-dated the modern, State-based international system. Even as the term has come most commonly to describe the formal relations between State governments governed by international law, subunits within those States have continued their own diplomatic practices. Scholars such as Ivo Duchacek and Panayotis Soldatos have considered those practices specifically in the context of subunits in federal States. 167 Duchacek has described how the diplomacy conducted by regional governments has traditionally been spurred by the need for cooperation between political communities sharing borders, but that it has evolved into further-reaching practices of 'global micro-diplomacy' out of an 'awareness of universal interdependence'. 168 City diplomacy too has been the subject of much contemporary work, as cities look beyond their borders to establish connections that might form the basis of information sharing and policy collaboration, and allow for them to work together to influence national governments and international organisations. 169 There is now work on the diplomatic practices of subnational governments in a number of countries, including, for example, China, 170 South Africa, 171 India 172 and Belgium. 173 The diplomatic activities of subnational governments can help bridge gaps between States, creating conditions for improved international cooperation. They can enhance the international position of the State, by giving 'density and intensity' to its foreign policy, and drawing on the relative flexibility and pragmatism of subnational governments. 174 In many cases, subnational governments can act more freely in their relations with foreign governments, as they are only partially 'sovereignty bound'. 175 Their diplomacy is usually characterised by relative informality, and the voluntary pursuit of political and economic ties. 176 Moreover, in situations where a lack of understanding of other countries acts a barrier to cooperation, subnational diplomacy can provide the basis for the development of cultural exchange and awareness that can form the basis for higherlevel ties. 177 In the United States, for example, legislators have recognised the potential for subnational diplomacy to 'advance international cooperation', and suggested a role for the federal government in 'empower[ing] subnational diplomacy to work with competitors where diplomatic tensions and disagreements might otherwise hamper cooperation.' 178 The diplomatic activities of Australia's states and territories can play a role in sustaining Australia's ties with foreign governments and its international position. This point was raised in various submissions to the Senate Foreign Affairs Committee inquiry. The Connected Cities Lab at the University of Melbourne argued that subnational diplomacy can be used by national executives to 'leverage foreign influence and cooperation beyond the national government level', and is 'fundamental to a modern, multilayered diplomatic strategy'. 179 Several reports in recent decades have described the weakening of Australia's diplomatic corps, as a result of funding cuts and underinvestment in DFAT. 180 The weakening of Australia's diplomatic capacity, and its failure to invest particularly in regional multilateralism, was raised in the parliamentary debates about the Foreign Relations Act. 181 Of course, not all subnational diplomatic activity is conducted in aid of, or in alignment with, the foreign policy goals of the national government. But even where this is the case, subnational governments function as part of a diplomatic 'web', 182 helping to maintain ties even where those at the national level falter: providing 'ballast in a relationship to ride out the diplomatic storms'. 183 Notably, as at March 2022, 2406 of the 3791 arrangements listed on the Public Register involved counterparties in China, 184 a government with which Australia has had difficult diplomatic relations for several years. 185 prioritise international engagement considerably more than its predecessor. 196 At others, they exhibit a fundamental wariness of the outside world. 197 The Foreign Relations Act, itself influenced heavily by the domestic debate and politics of the era in which it was enacted, tends towards the latter approach. In doing so, it may have ramifications for the way that Australia engages with the rest of the world, and with an international system that depends on cooperation and exchange between States.

V Conclusion
This article has argued that the Foreign Relations Act might have consequences for Australia's relationship with international law by limiting or affecting the ability of state, territory and local governments to develop and manage their own relations with foreign governments. At least in one sense, the Foreign Relations Act could enhance the ability of the Commonwealth to act in compliance with its international legal obligations by giving it control over subnational foreign arrangements that might be substantively inconsistent with those obligations. However, it also gives the Commonwealth the power to limit the ability of state, territory and local governments to engage with other subnational and national governments on issues of both local and global significance. As international lawyers increasingly look to actors other than the central State government for solutions to multilateral 'gridlock', 198 they are beginning to construct a more complete account of the ways in which subnational governments might be relevant to international law. Many of these operate outside the formal structures of international law, but they nonetheless have the potential to influence its development and to uphold and further the aims of the international system.
If Australian subnational governments, particularly the states and territories, continue to assert themselves in opposition to the Commonwealth, the powers conferred on the Commonwealth by the Foreign Relations Act could become of particular significance. The conflict between the Commonwealth and the states and territories that has been a hallmark of the pandemic era may be an anomaly, but it may also become a more lasting phenomenon. Where divisions between the Commonwealth and the states and territories exist on matters in which governments around the world similarly have an interest, such as climate change, the states and territories may continue to look beyond their borders to form partnerships and find support for their policies. The Foreign Relations Act places control over such arrangements squarely in the hands of the Commonwealth.
There is another, secondary, sense in which the Foreign Relations Act might impact Australia's relationship with international law. The foreign activities of subnational governments give the nation multiple points of contact to the rest of the world. They can play a role in establishing and maintaining ties with foreign governments and other international actors. Such ties can be important in enabling and facilitating relations between States, and in keeping channels of communication open. They can also undermine national foreign policy and complicate the pursuit of normative goals of the international system. For better or for worse, the Foreign Relations Act centralises control over such activities in the Commonwealth government. This might impose some measure of discipline on Australia's international engagement in a difficult geopolitical climate, but it also risks closing the nation off from the rest of the world. It might have consequences for Australia's relationship with an international legal system that relies, at least in part, on the contributions and ambitions of actors such as subnational governments.