Bougainville’s Winding Path to Self‑determination

After years of consultations over the ratification of the 2019 Bougainville Independence Referendum, the date for the mandatory vote in Papua New Guinea’s (PNG) National Parliament has now been set for 30 August. Under the 2001 Bougainville Peace Agreement (BPA), the parliament in Port Moresby holds the “final decision‑making authority” over the referendum outcome, which in December 2019 delivered a 97.7 percent majority for independence. The 118 lawmakers must decide whether to ratify the result, a step that would compel the PNG Government to let Bougainville go. In the lead‑up to this historic vote, political actors are circulating a range of proposals for what should follow. While the PNG Government and the Autonomous Bougainville Government (ABG) continue negotiating behind closed doors, the prospects of a smooth ratification that would grant Bougainville immediate independence appear slim. Instead, Bougainville’s winding path to self‑determination seems set to take yet another unexpected turn.

Image: A winding path on Buka, Autonomous Region of Bougainville, July 2022 (Source: Christopher Brucker)

On 9 June, the PNG Parliament adopted a Sessional Order specifying the procedure for the mandatory ratification vote. To the surprise of many observers, the bill requires a three‑quarters majority for the referendum result to be ratified. Although the drafting process was originally intended to reflect the preferences of both sides, negotiations were overshadowed by unilateral moves from PNG leaders. Not for the first time, such obstructive actions by PNG have caused deep frustration within the ABG. President Ishmael Toroama has publicly lamented that the procedure would “undermine” the entire peace process and constitute a “breach” of the Melanesian Agreement, a key milestone in the consultations. While assuring that the ABG will “continue to participate in the negotiations in good faith”, Bougainville’s Vice-President Ezekiel Masatt made clear that “BOUGAINVILLE INDEPENDENCE IS NON-NEGOTIABLE.” Regardless of such repercussions, the ABG remains committed to attaining independence by 1 September 2027, even if this requires unilateral action.

Notwithstanding the outcome of the parliamentary vote, PNG Prime Minister James Marape has called to find a “solution” that reconciles the aspirations of both sides. Either parliamentary outcome, ratification or rejection, would necessitate follow-up consultations and will likely involve transitional provisions. Here would lie sufficient common ground for the development of a unique compromise. In this regard, PNG Minister for Bougainville Affairs Manasseh Makiba made clear that either parliamentary decision will resume the consultation process. A yes vote would not result in Bougainville becoming an independent state immediately. PNG will first need to amend its constitution; transitional arrangements would also be required to make the process workable. Likewise, a no vote would not automatically terminate engagement between the ABG and the PNG government. While the autonomy arrangement will remain in place, both sides will have to resume consultations, accommodating the unequivocal referendum result with the decision of the PNG Parliament. This also means that Bougainville’s current status quo, substantial autonomy, will undergo some change. The PNG Government appears to have realized that Bougainville’s independence bid cannot simply be rejected, even if the parliament votes no.

The current debate is dominated by three prospects: (1) independence for Bougainville, (2) unilateral action by the ABG, and (3) a compromise solution that goes beyond the current autonomy arrangement. Bougainville’s post‑referendum process has been full of twists and turns, with many agreements and proposals difficult for casual observers to follow. This blogpost seeks to clarify some of these ambiguities by providing a clear‑cut overview of the current challenges in Bougainville’s quest for independence. It briefly recalls what is at stake in the post‑referendum consultations and then takes a closer look at the three scenarios currently circulating.

The post-referendum consultations

Bougainville’s quest for self-determination has its roots in the 1886 Anglo‑German agreement that demarcated spheres of influence in the South Pacific, under which Bougainville was incorporated into German New Guinea and thereby cut off from the Solomon Islands. The long‑standing dispute over Bougainville’s identity and belonging escalated dramatically more than a century later, culminating in an uprising in November 1988 and a Unilateral Declaration of Independence in May 1990. After several years of protracted fighting, the so‑called “Crisis” came to an end in 1997 with a truce brokered by New Zealand and Australia. The peace process commenced in August 2001 with the signing of Bougainville Peace Agreement (BPA). Its three pillars are: 1) Substantial autonomy for Bougainville, 2) weapons disposal, and 3) an independence referendum following a transition period. While the referendum was required to include the option of “separate independence for Bougainville,” it was designed as non‑binding, meaning that its outcome “will be subject to ratification (final decision‑making authority) of the National Parliament.” To underscore its significance, the BPA was incorporated into PNG’s Constitution (Part XIV).

Image: Anglo-German Demarcation of the South Pacific, 1886 (Source: BArch R1001-3081/0025)

The Autonomous Region of Bougainville (AROB) was established in 2002, and disarmament was completed in 2005. After repeated postponements, the referendum took place in December 2019, with an overwhelming majority voting for independence. According to the BPA, Port Moresby and the ABG were then obliged to “consult over the results of the referendum” – a process that began in May 2021. The purpose of the consultation process is to find a working compromise for the schedule and mode of the parliamentary vote as well as its aftermath, as both the BPA and PNG’s constitution are vague on these matters. During the second round of consultations in July 2021, the two parties agreed that the ratification process would be concluded “no earlier than 2025 and no later than 2027.”

ABG President Ishmael Toroama, himself a former commander in the secessionist Bougainville Revolutionary Army (BRA) and a signatory to the BPA, came to power in 2020 with a clear mandate and a firm determination to implement the referendum result and achieve independence within a reasonable period. The initial target of 2025 was later revised to September 2027. From the outset, the ABG maintained that the overwhelmingly clear referendum result made ratification mandatory. Accordingly, the parliamentary vote would be merely acclamatory, requiring only a simple majority. Port Moresby, by contrast, argued for a two‑thirds majority, given the issue’s national significance and the constitutional status of the BPA.

The PNG Government seeks to retain control over Bougainville to avoid setting a precedent that could provoke secessionist mobilization or violent unrest in other regions of the country. In the short history of PNG, the conflict has been the country’s most significant political issue, making the Bougainville question an emotionally charged matter for many citizens. Bougainville’s enormous mineral reserves appear to be of lesser concern for Port Moresby. The ABG now holds the majority of shares in Bougainville Copper Limited (BCL), the principal mining company. Economic competencies, including control over natural resources, already fall under the autonomy arrangement and are therefore off‑limits to the PNG Government. A negative parliamentary vote would simply prolong Bougainville’s autonomous status until both sides agree on an alternative arrangement. There’s also no significant security interest, as PNG has neither military nor police on Bougainville, effectively excluding the region from the Mutual Defence Treaty with Australia signed in October 2025.

Throughout the years, the post‑referendum consultations were complex and often heated, marked by frequent misunderstandings but also by numerous agreements intended to structure the process. Since 2024, the consultations have been mediated by independent facilitators: initially the New Zealander Jerry Mateparae, from early 2026 on the South African Richard Melville Smith, operating under the auspices of the United Nations Development Programme. A major breakthrough was reached in June 2025 with the signing of the Melanesian Agreement, which committed the signatories to: (1) jointly work out a sessional order for the parliamentary vote, (2) accept its outcome, (3) continue consultations afterwards, and (4) develop a roadmap for the post‑vote period, the so‑called Melanesian Framework. As part of this process, the voting threshold has now been set to a three‑quarters majority, rendering a parliamentary endorsement of independence incredibly difficult. Makiba also stressed that the PNG Parliament is not a mere “rubber stamp” but has the authority to make a substantive decision on the matter. Ahead of the vote, it is clear that only a small minority of parliamentarians would openly support Bougainville’s independence, among them the four Bougainvillean members of the chamber. While we await the Melanesian Framework, which is intended to guide the consultation process after the historic vote, let us take a closer look at the three scenarios currently dominating the discussion.

Scenario one: independence

The immediate achievement of independence through a yes vote in the PNG Parliament is undoubtedly the ABG’s preferred outcome. Since 2020, Bougainvillean leaders have undertaken substantial efforts to move the region closer to “independence readiness.” After two years of region-wide consultations, a Bougainville Constitutional Planning Commission (BCPC) has presented its first draft of a “home-grown” Constitution of the Republic of Bougainville in May 2024. To fund independence, the ABG is advancing the redevelopment of the long-closed Panguna Mine in partnership with the Indian company Lloyds Metals & Energy Limited. Modern mining equipment has already arrived in Panguna, but the redevelopment process will take years. On the diplomatic front, President Toroama has repeatedly sought to establish ties with foreign leaders and appealed to Washington D.C. to support Bougainville’s independence.

If the PNG Parliament votes to ratify the referendum outcome, PNG would be constitutionally obliged to withdraw its jurisdiction and formally grant Bougainville independence on an agreed date, preferably no later than 1 September 2027. While the handover process has not yet been defined, it is plausible that a Bougainville Constituent Assembly would first adopt the new constitution, after which the Bougainville Government would formally declare independence. As PNG and Bougainville would continue their close relationship as two independent states, the new Bougainvillean Republic would then seek to establish diplomatic relations with its neighbours. It would aim to remain outside the major geopolitical rivalries in the Pacific and apply for membership in regional organisations such as the Pacific Islands Forum and the Melanesian Spearhead Group, as well as international organisations, most importantly the UN. If everything proceeds as planned, the UN General Assembly could decide on Bougainville’s admission by the end of 2027, making it the organisation’s 194^th member and the world’s newest independent state.

Image: First Draft of the Constitution of the Republic of Bougainville (Source: ABG)

However, following the recent adoption of the sessional order for the ratification vote, an all‑too‑smooth independence process for Bougainville appears increasingly doubtful. According to a recent legal opinion commissioned by the Marape Government, allowing Bougainville to secede would also require an amendment to PNG’s Constitution, which in turn demands another two‑thirds majority in Parliament. Beyond these constitutional questions, a further obstacle to immediate independence is Bougainville’s precarious fiscal and economic situation. Secession entails the withdrawal of the metropolitan state from the territory, including the full range of government functions that would then need to be assumed by the newly established state. Despite substantial competencies in economic and fiscal matters, the ABG can only raise about 8% of its budget internally. The largest share of the ABG’s annual revenue comes from PNG government grants, making Bougainville exceptionally dependent on Port Moresby. A rushed withdrawal from PNG would likely cut this revenue stream – a point frequently raised by PNG politicians. The ABG’s difficulties in independently raising budget revenues result from economic underdevelopment, itself a long‑term consequence of the Crisis. Even in the case of a positive parliamentary vote, a transition process would be required to prepare Bougainville for full independence, which the ABG is well aware of.

Scenario two: unilateral action

If the PNG Parliament rejects the ratification of the referendum and both sides fail to reach a compromise in the consultations, it is possible that the ABG will seek a unilateral solution. International observers have long warned that such a reaction could be possible, especially as reaction to obstructive actions by the PNG Government between 2021 and 2024. Such speculations were fuelled by statements from ABG Vice President Massat who declared that Bougainville might pursue “other routes to independence” or “bypass” the post-referendum process entirely. What he had in mind was less a straightforward unilateral declaration of independence (UDI) than a more gradual approach linked to Bougainville’s parallel constitution‑making process.

In an interview with Radio New Zealand, Massat outlined in March 2024 how the ABG could follow this constitutional strategy should the consultations and the parliamentary vote would fail bring independence for Bougainville: A Bougainvillean Constituent Assembly would be formed from the Bougainville House of Representatives, adopt the draft constitution, and thereby constitute Bougainville as an independent state. According to Massat, this would not be a “unilateral declaration [but] a constitutional process that has precedence.” Ironically, this precedence was set by PNG itself. In the early 1970s, local leaders in the Territory of Papua and New Guinea – then still an Australian colony – initiated a process of “autochthonous” constitution‑making. By bypassing colonial jurisdiction and developing a home-grown constitution through repeated consultations with the territory’s population, they effectively forced Australia to accelerate PNG’s decolonisation process.

While adopting such a process would mirror PNG’s own path to independence, its political consequences remain unclear. If anything, it would create a highly unpredictable situation. Unilateral action would likely disrupt the consultation process and lead to the termination of budget support from Port Moresby. Even though the ABG could claim to be acting in line with a precedent set by its own metropolitan state, Port Moresby’s reaction would remain the decisive factor for third states. If PNG’s government continues to uphold its legal claim over Bougainville, even the most carefully designed constitutional process will likely be regarded as unilateral action – with all the difficult consequences that entails.

Third states generally respect the territorial integrity of sovereign states and refrain from premature diplomatic recognition of secessionist entities. Non‑recognition is the most common initial response to unilateral independence, and there is no reason to expect Bougainville would be treated differently. Australia, the most significant regional power and “witness” to the peace process, shows no interest in supporting Bougainville against the wishes of Port Moresby. On the contrary, as Port Moresby’s traditional patron, Australian officials have repeatedly indicated that they respect PNG’s sovereignty and would not support a unilateral independence of Bougainville in any form. Bougainville maintains only limited diplomatic relations, even though the ABG has sought to raise its international profile in recent years. Under such circumstances, Bougainville would be likely to emerge not as the world’s next independent state, but as its next de facto state.

Image: Declaration of Independence, May 1990 (Source: Courtesy of Mike Forster)

Bougainville’s history with UDIs is a troubled one. Secessionists have unilaterally declared independence twice, first in 1975 and again in 1990. In both cases, third states have treated the conflict as an “internal matter” of PNG and refrained from supporting the breakaway entity. Whereas the 1975 attempt ended in a peaceful reintegration, the 1990 UDI triggered a significant escalation of the Crisis. Despite several peace initiatives and ceasefire agreements, the conflict claimed almost 20,000 lives and continued until October 1997, when it was finally pacified following a peace intervention by Australia and New Zealand. To be sure, a similar violent escalation is hardly possible today.

After the signing of the Melanesian Agreement in June 2025, unilateral rhetoric toned down substantially. Now that the historic vote is drawing closer and the chances of immediate independence are dwindling, Bougainvillean leaders appear to be expressing their frustration more openly again. Following the announcement of the threshold for the parliamentary vote, ABG Vice President Masat reiterated earlier warnings that Bougainville could pursue “unconventional options” to achieve independence. Whether this talk of unilateral action is merely a bargaining posture or a credible threat is difficult to assess. We cannot rule out that the ABG will proceed unilaterally if it perceives the process as dismissive of Bougainville’s independence aspirations. At most, the unilateral option becomes a real possibility when the PNG Parliament rejects the referendum result and both sides fail to agree on a compromise solution. It seems plausible that the ABG’s warnings of unilateral action have influenced the PNG Government’s declared willingness to pursue a compromise arrangement regardless of the parliamentary vote. However, this assumption cannot be proven at this time.

Scenario three: a middle way?

A rejection of the referendum result in the PNG Parliament will withdraw the independence option, but Bougainville’s current autonomy arrangement would remain in force. However, it seems that the PNG Government has understood that simply rejecting Bougainville’s independence bid will not work, given the unequivocal outcome of the referendum and the steadfast determination of the ABG. Marape seems to be ready to work out a compromise that at least goes beyond the status quo, regardless of the parliamentary vote. He recently raised the idea of a middle way between the current autonomy arrangement and full independence, accommodating both Bougainville’s unequivocal wish for independence and the clear reservations within the PNG Parliament. Under this proposal, consultations between the ABG and the PNG Government before and after 30 August would focus on developing a new compromise regarding Bougainville’s status. One “model” he highlighted was the relationship between the Cook Islands and New Zealand, commonly referred to as Free Association.

Associated statehood is a distinct status in international law, involving a formally codified special relationship between a metropolitan and an associated state. Major principles are specified in UN General Assembly Resolution 1541 (XV) of December 1960, which establishes Free Association as a credible mode of decolonization equal to independence and integration into another state. Upon formally achieving a full measure of self‑government, the associated state voluntarily delegates a number of sovereign powers back to its former metropole. In exchange, the associated state receives a degree of protection, typically in the fields of security and economy. The terms of the relationship are enshrined in a contract between both parties. Free Association is a highly adaptable model and allows for a wide range of arrangements, depending on the particular compromise reached between the two sides. Thus, it can also serve as a transitional status on the way to full independence. Throughout decolonization, the model was particularly attractive to small island territories in the Caribbean and the Pacific that saw themselves as not viable enough or were unwilling to achieve full independence.

Examples include:

1) The Compact of Free Association states (Palau, the Federated States of Micronesia, and the Republic of the Marshall Islands), which have transferred comprehensive security competencies to the United States and receive substantial economic support from Washington, but otherwise exercise unrestricted self‑government and are full UN members;

2) The Cook Islands and Niue in Free Association with New Zealand, which are fully self-governing, receive economic support, have the right to conduct foreign policy, but are not UN members;

3) The British West Indies (Antigua, Dominica, Grenada, Saint Christopher-Nevis-Anguilla, Saint Lucia, and Saint Vincent), where Free Association has been used as a transitional status before independence in the 1970s and 1980s.

Scholars have identified a number of substantial elements:

1) full internal self‑government for the associated state;

2) democratic approval through a referendum in the associated state;

3) the right of both parties to terminate the arrangement unilaterally;

4) economic assistance by the metropolitan state;

5) defence remaining the responsibility of the metropolitan state.

Further elements, such as 6) shared citizenship and 7) the extent of the right to conduct diplomacy and join international organisations depend on the particular arrangement. Associated states possess substantial international legal personality. Other than in autonomy arrangements, they are no longer part of the metropolitan state; the transfer of sovereign powers is voluntary and based on an agreement between equals. In terms of degrees of sovereignty, associated states occupy a middle position between fully independent states and integrated territories, with substantially more powers than autonomous regions. Recent research suggests that Free Association arrangements can both perpetuate relations of subordination, dependency, and patronage, but also provide agency for the associated state.

Image: Degrees of Sovereignty, WIP (Source: Christopher Brucker)

The option of Free Association for Bougainville was briefly discussed during the early preparations for the referendum but then discarded in November 2018. International advisors brought up the idea again in 2019. During the post-referendum consultations, Bougainvillean politicians ruled out Free Association several times. The Bougainville Memoir, an ABG mission statement presented during the consultations in April 2025, stated: “Bougainvilleans see no other political settlement options such as free associations, autonomy, federated states or any other. Independence is the only options Bougainvilleans voted for, will fight for until it is achieved.” In late 2025, Massat publicly declared that Free Association had already been “legally rejected.” On the other hand, Bougainvillean leaders have already conceded that a transition period could be part of the independence process. In the Bougainville Memoir, ABG President Toroama mentioned a “transition package” under UN supervision.

Regardless of the parliamentary outcome, both sides have agreed to continue the consultations and work out a bespoke compromise that accommodates both needs. During a recent speech in the PNG Parliament, Prime Minister Marape said with a view to the vote on 30 August: “If there is a no, it must be a no with a yes. If there is a yes, it must be a yes with a no.” Afterwards, Marape proposed a 15-year period during which Bougainville would have to “demonstrate readiness for nationhood” prior to yet another vote in the PNG Parliament. As the PNG Government has come to recognize that it must offer Bougainville a status exceeding the current autonomy powers, and as the ABG acknowledges that independence will require a transition period, a shared basis emerges for negotiating a transitional Free Association arrangement. According to sources, the Free Association model had already been presented to the parties by external advisors and was most definitely a topic of discussion during the consultations.

Depending on the arrangement, Bougainville would be allowed to symbolically declare independence, adopt its home‑grown constitution, establish diplomatic relations with neighbouring states, and seek UN membership. It would continue to receive budget support from Port Moresby and remain in a special relationship with PNG for a defined period or until particular benchmarks are reached. PNG, in turn, could buy time to prepare properly for Bougainville’s full secession and ensure an orderly and constitutionally sound withdrawal. Because such an arrangement would be complex and require consensus on a wide range of technical matters – currency, citizenship, property, transport, postal services, and more – negotiations would inevitably demand considerable time and energy. In line with international law and common state practice, a transitional Free Association arrangement would also require democratic legitimation. For Bougainville, this could even entail a second referendum, as the Free Association option was explicitly excluded from the 2019 vote. As Free Association has never been used to settle secessionist conflict outside a decolonization context, such an approach would make Bougainville a forerunner in developing new solutions to self‑determination disputes, offering valuable insights for comparable cases around the world, from New Caledonia to Greenland.

A pathway forward

A credible way out of the quandary could be the Melanesian Framework, a roadmap currently being drafted by the ABG and the PNG Government to define the “pathway forward” after the parliamentary vote. Proposed during the post‑referendum consultations, it could serve as the format in which both sides outline the fundamentals of a compromise solution. Despite recent resentments, work on the document continues behind the scenes. Its presentation is expected in July and will form part of the range of debates leading up to the parliamentary vote on 30 August. Observers should pay close attention to its release, as the Melanesian Framework could determine the next turn in the ever‑winding path toward Bougainville’s independence.

Author: Christopher Brucker

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