Noumea Convention 1986: South Pacific Marine Environment

Background: SPREP founded 1982 + UNEP Regional Seas

The South Pacific basin is the largest by area of the 18 UNEP Regional Seas Programmes and is structurally distinctive among them. It is not a closed sea like the Mediterranean, the Black Sea or the Persian Gulf, nor a true open margin like the Atlantic-African coast covered by the Abidjan Convention or the South-East Pacific margin covered by the Lima Convention, but rather a vast oceanic archipelagic theatre in which the land area is small and dispersed while the ocean area is enormous and continuous. The basin spans more than 12,000 km from west to east (from the Solomon Sea to the Pitcairn Islands) and more than 3,000 km from north to south (from the equator to the Tropic of Capricorn at approximately 23.5°S, with the Convention area extending to 30°S to capture the New Zealand and Norfolk Island sub-tropical waters), and contains the world’s largest concentration of small island developing states (SIDS) by both number and aggregate ocean territory.

The institutional architecture for cooperation in this basin developed through three overlapping regional bodies. The South Pacific Commission (SPC) was established by the Canberra Agreement of 6 February 1947 as a colonial-era inter-governmental body of the metropolitan powers (Australia, France, the Netherlands, New Zealand, the United Kingdom and the United States) to coordinate the administration of the non-self-governing territories of the South Pacific. The South Pacific Forum (later renamed the Pacific Islands Forum, PIF) was established at Wellington in August 1971 as the political body of the newly independent Pacific island states (Cook Islands, Fiji, Nauru, Samoa, Tonga and the metropolitan powers Australia and New Zealand) outside the colonial-era SPC framework. The South Pacific Regional Environment Programme (SPREP) was established in 1982 as a joint programme of the SPC and the PIF, headquartered initially at the SPC offices in Noumea, New Caledonia.

SPREP was elevated to an autonomous regional intergovernmental organisation by the 1993 SPREP Agreement (the Agreement Establishing SPREP, signed in Apia on 16 June 1993 and in force from 31 August 1995), with its Secretariat relocating to Apia, Samoa in 1992 in advance of the autonomous status. The acronym was retained but the name evolved from “South Pacific Regional Environment Programme” to “Secretariat of the Pacific Regional Environment Programme” in 2004 to reflect membership extending into Micronesia beyond the geographic South Pacific.

By the early 1980s SPREP had become the natural counterpart for UNEP in negotiating an Action Plan and framework Convention for the South Pacific. UNEP launched preparatory consultations through expert meetings with the SPREP Secretariat and the member states and territories, producing two parallel documents on the same Mediterranean and Caribbean architectural pattern: an Action Plan for Managing the Natural Resources and Environment of the South Pacific Region as the operational programme, and a binding framework Convention as the legal anchor. The Action Plan was endorsed in 1982 at the same Conference at which SPREP was founded, and the Convention was opened for signature four years later at Noumea in 1986.

1986 Noumea signing + 1990 entry into force

The Conference of Plenipotentiaries on the Protection of the Natural Resources and Environment of the South Pacific Region convened in Noumea, New Caledonia in November 1986 under the auspices of UNEP and SPREP. The Conference was hosted by the Government of France in its capacity as the metropolitan administering power for New Caledonia and was held against the politically sensitive backdrop of the 1985 sinking of the Rainbow Warrior in Auckland Harbour by French DGSE agents on 10 July 1985 (which had inflamed Pacific opinion against France) and the continuing French nuclear testing programme at Mururoa and Fangataufa in French Polynesia. The Conference adopted three instruments on the closing day, 24 November 1986: the parent Convention, the Dumping Protocol and the Pollution Emergencies Protocol.

The Convention required ratification by ten states or territories to enter into force. Ratifications were deposited at a moderate pace through the late 1980s: Australia, the Cook Islands, Fiji, France, the Marshall Islands, the Federated States of Micronesia, New Zealand, Papua New Guinea, the Solomon Islands and the United States reached the threshold, with the Convention entering into force on 22 August 1990, three years and nine months after signature. The two Protocols entered into force on the same day under their parallel ratification provisions.

The 1990 entry-into-force opened a consequential regional decade. The end of the Cold War in 1989-1991 reshaped Pacific strategic geography; France ended its atmospheric nuclear testing in 1974 and underground nuclear testing in January 1996; the independence of Palau in 1994 completed the decolonisation of the Trust Territory of the Pacific Islands; and the 2002 Pacific Islands Forum decision to establish a Council of Regional Organisations of the Pacific (CROP) consolidated regional co-ordination across SPREP, the PIF, the SPC, the FFA and the University of the South Pacific.

The 22 contracting parties (PICs + USA + UK + France + AU + NZ)

As of 2026 the Noumea Convention has 22 Contracting Parties, comprising the independent Pacific Island Countries plus the metropolitan and former metropolitan powers that retain administering responsibilities in the basin:

• Independent Pacific Island Countries (14): Cook Islands, Federated States of Micronesia, Fiji, Kiribati, Marshall Islands, Nauru, Niue, Palau, Papua New Guinea, Samoa, Solomon Islands, Tonga, Tuvalu and Vanuatu.
• Metropolitan and administering powers (4): Australia (in its own right and historically for Norfolk Island), New Zealand (in its own right and for the Cook Islands and Niue under the Realm of New Zealand free-association arrangements), France (for French Polynesia, New Caledonia and Wallis and Futuna) and the United Kingdom (historically for Pitcairn while retaining the depositary obligation).
• United States (for American Samoa, Guam and the Commonwealth of the Northern Mariana Islands), counted variously as one or three Parties depending on the methodology used by SPREP.

The 22 Parties are extremely heterogeneous compared with the 5 of the Lima Convention or the 9 of the Helsinki Convention. They range from Australia (a G20 economy of approximately 27 million people and a continental landmass) to Niue (a free-associated state of approximately 1,600 people on a single raised coral island of 261 km²), and they span six time zones and three subregional groupings (Polynesia, Melanesia and Micronesia). The political diversity is structurally embedded in the SPREP Council, where each Party regardless of population has equal voting rights. The result is that the decision-making weight of small island states is comparable to or greater than the decision-making weight of the metropolitan powers, an arrangement that has shaped the Convention’s climate-resilience and seabed-mining-precaution agendas through the 2010s and 2020s.

Geographical scope: >30 Mkm² South Pacific (130°E to 120°W, equator to 30°S + EEZs)

The Convention area is defined in Article 2 as the South Pacific Region, comprising:

• The two-hundred-nautical-mile zones of the SPREP member parties from the high-water mark to the outer limit of the EEZ as established by each Party;
• The areas of high seas enclosed within the geographic envelope from the equator to 30°S and from 130°E to 120°W;
• Areas of the Tasman Sea to the south of the geographic envelope where they are linked to the EEZs of Australia, New Zealand or Norfolk Island.

The latitudinal-longitudinal extent of the geographic envelope alone is approximately 35 million km², and once EEZs of PICs falling outside the geographic box are added (notably the Kiribati EEZ which extends from approximately 4°N in the Northern Line Islands to 12°S in the Phoenix Islands and to 11°S in the Gilbert Islands, well across the equator), and once the Tasman Sea linkages are added, the operational Convention area exceeds 30 million km² by all credible methodologies and may approach 40 million km² under generous interpretations. The basin contains:

• The Coral Sea between the Great Barrier Reef and Vanuatu, one of the world’s most biodiverse warm-water seas, encompassing the Australian Coral Sea Marine Park (approximately 989,842 km²);
• The Solomon Sea between PNG, the Solomon Islands and Vanuatu, a tectonically active area at the convergence of the Indo-Australian and Pacific plates;
• The Tasman Sea between Australia and New Zealand, a temperate-to-subtropical transition basin with the East Australian Current and the Tasman Front;
• The South Pacific gyre between French Polynesia and Easter Island, the most oligotrophic ocean region on Earth with Secchi-disk transparencies approaching 70 m;
• The Equatorial Pacific and the Western Pacific Warm Pool centred near 5°N, 150°E, the largest body of warm water on Earth and the principal driver of El Niño-Southern Oscillation (ENSO).

Polynesia, Melanesia and Micronesia subregions

The Convention area encompasses the three classical Pacific subregions:

• Polynesia (the “many islands”): a vast triangle from Hawaii in the north to New Zealand in the south-west to Easter Island in the south-east, encompassing within the Noumea Convention area French Polynesia, the Cook Islands, Niue, Samoa, American Samoa, Tokelau, Tonga, Tuvalu, Wallis and Futuna and Pitcairn. Polynesian seafaring traditions migrated eastward from the Lapita complex of around 1500 BCE to colonise the entire eastern Pacific by approximately 1300 CE, the most extensive maritime expansion of any pre-modern people.
• Melanesia (the “black islands”): the chain of large volcanic and continental islands from Papua New Guinea through the Solomon Islands, Vanuatu, New Caledonia and Fiji. Melanesia contains the largest landmasses in the basin (PNG at 462,840 km² is the second-largest island in the world after Greenland), the highest population densities (PNG alone is approximately 10 million of the basin’s roughly 13 million PIC residents) and the most linguistically diverse population on Earth (PNG has approximately 840 living languages).
• Micronesia (the “small islands”): the scatter of low coral atolls and small high islands north of Melanesia, encompassing within the Convention area Palau, the Federated States of Micronesia, the Marshall Islands, Kiribati (the Gilbert Islands portion), Nauru and the US territories of Guam and the Commonwealth of the Northern Mariana Islands. Micronesia is the most low-lying and climate-vulnerable of the three subregions, with most inhabited islands at less than 5 m mean elevation.

The three subregions are linked by overlapping shipping lanes, fisheries (the central and western Pacific tuna fishery is the largest single-species fishery on Earth by volume) and migration corridors, but they are politically organised through three distinct subregional groupings: the Polynesian Leaders Group (since 2011), the Melanesian Spearhead Group (since 1986) and the Micronesian Presidents’ Summit (since 2003). All three coordinate their environmental positions through SPREP at the regional level and through the Pacific Islands Forum at the political level.

EEZ-to-land ratio: Kiribati 11,000:1, Cook Islands 5,000:1

The Pacific Island Countries collectively have the largest EEZ-to-land ratios on Earth, an arithmetic consequence of small dispersed land area combined with the universal 200 nautical mile EEZ under UNCLOS Articles 55 to 75. Selected ratios (EEZ area in km² divided by land area in km²):

• Kiribati: approximately 3,550,000 km² EEZ over 811 km² land, giving roughly 11,000:1
• Cook Islands: approximately 1,960,000 km² EEZ over 236 km² land, giving roughly 5,000:1
• Tuvalu: approximately 900,000 km² EEZ over 26 km² land, giving roughly 34,600:1 (the highest EEZ-to-land ratio of any state on Earth)

Tokelau (a New Zealand non-self-governing territory) exceeds even Tuvalu by this measure. The PICs collectively administer ocean territories totalling approximately 20 million km² (more than the combined land area of the United States, China and India) on a combined land area of approximately 550,000 km² (less than the area of France).

The structural consequence is that the PICs are maritime states in the most literal sense: their economies are primarily driven by fisheries access fees, tuna licence revenues and the limited coastal tourism their land base supports, with the EEZ serving as the principal national patrimony rather than the land base. The implication for the Noumea Convention regime is that the operational scope of the Convention extends across an ocean territory of continental scale managed by national administrations of small island scale, requiring extensive regional pooling of monitoring, surveillance and enforcement capacity through SPREP, the FFA, the Pacific Community and the regional university system.

Secretariat: SPREP in Apia, Samoa (since 1992)

The Permanent Secretariat of SPREP is located at Vailima, Apia, Samoa at the foot of Mount Vaea (the burial site of Robert Louis Stevenson, who died in Vailima in 1894). The Secretariat moved from Noumea to Apia in 1992 in advance of the autonomous status conferred by the 1993 SPREP Agreement, in part to relocate from a French colonial capital to an independent Pacific Island Country capital and in part to centralise SPREP near the Pacific Islands Forum Secretariat (which is in Suva, Fiji).

The Secretariat is staffed by approximately 120 personnel of whom approximately 60 percent are Pacific-Islander nationals, organised into divisions for biodiversity and ecosystems, climate change resilience, waste management and pollution control, environmental monitoring and governance, and corporate services. The Director-General is appointed by the SPREP Council for a five-year term renewable once. The Secretariat administers the Noumea Convention, the SPREP Agreement, the Apia Convention 1976 (Convention on Conservation of Nature in the South Pacific, which never received the four ratifications required to remain in full operation and was effectively superseded by the Noumea Convention), and the SPREP Strategic Plan 2017-2026 with its successor under negotiation.

The Secretariat hosts the Pacific Climate Change Centre (opened 2019), the Inform Pacific environmental data platform, the Pacific Ocean Pollution Prevention Programme (PACPOL) and the Pacific Marine Climate Change Cooperative, all of which constitute the operational delivery mechanism for the Convention’s substantive obligations.

Two protocols: reference table

The following table summarises the two instruments adopted alongside the Convention at Noumea on 24 November 1986.

Both Protocols are in force with the same Contracting Party pool as the parent Convention. No additional Protocols have been adopted as of 2026, though a potential Protocol on Land-Based Sources or on Plastic Pollution has been canvassed at recent COPs.

Dumping Protocol (Noumea 1986, in force 1990)

The Protocol for the Prevention of Pollution of the South Pacific Region by Dumping was adopted at Noumea on 24 November 1986 and entered into force on 22 August 1990, the same day as the parent Convention. It is one of the regional dumping protocols in force globally, complementing the 1976 Barcelona Dumping Protocol (as amended 1995) in the Mediterranean and the provisions of the 1972 London Convention and the 1996 London Protocol at the global level. The Protocol prohibits the dumping at sea of:

• Annex I “Black List” substances: organohalogen compounds, mercury, cadmium, persistent plastics and synthetic materials, persistent oils and hydrocarbons, high-level radioactive wastes, biological and chemical warfare materials, and waste of any other description that has carcinogenic, mutagenic or teratogenic properties at sea-relevant concentrations;
• Annex II “Grey List” substances without prior special permit: significant quantities of arsenic, lead, copper, zinc, organosilicon compounds, cyanides, fluorides, low-level radioactive wastes, scrap metal, ship and platform structures, and substances causing serious obstruction to navigation;
• All other substances without prior general permit.

The Protocol was historically significant because it explicitly prohibited the dumping of high-level radioactive waste at a time when the global dumping regime under the 1972 London Convention still permitted certain radioactive dumping (the LC moratorium on radioactive dumping took effect in 1983 and was made permanent by the 1996 London Protocol). The Noumea Dumping Protocol therefore represented a regional consolidation of the precautionary approach to radioactive marine disposal, three years ahead of the global moratorium becoming binding under the Protocol.

The Protocol also imposes additional regional obligations not present in the global regime: it prohibits dumping in areas of special biological or ecological importance (defined by SPREP COP decisions), it prohibits dumping by vessels and aircraft of non-Parties in the Convention area to the extent permitted by international law, and it requires Parties to maintain records of all dumping operations for transmission to SPREP and the IMO.

Pollution Emergencies Protocol (Noumea 1986, in force 1990)

The Protocol Concerning Co-operation in Combating Pollution Emergencies in the South Pacific Region was adopted at Noumea on 24 November 1986 and entered into force on 22 August 1990, the same day as the parent Convention and the Dumping Protocol. It is the regional implementation instrument for the global OPRC Convention 1990 (Oil Pollution Preparedness, Response and Co-operation), which was adopted four years after the Noumea Protocol but with which the Noumea Protocol is fully harmonised through subsequent COP decisions.

The Protocol obliges Parties to:

• Maintain a National Marine Pollution Contingency Plan for response to oil and chemical pollution incidents;
• Notify other Parties and the SPREP Secretariat of pollution incidents which affect or are likely to affect their interests;
• Co-operate in mutual assistance for response operations including the deployment of equipment, expertise and personnel;
• Designate a Competent National Authority (typically the maritime safety authority or the environment ministry) for receipt and transmission of pollution alerts;
• Participate in the Pacific Islands Regional Marine Spill Contingency Plan (PACPLAN), which serves as the regional co-operation framework administered by SPREP.

PACPLAN was first adopted in 1992 and has been revised four times, most recently in 2021 to incorporate HNS (Hazardous and Noxious Substances) response under the OPRC-HNS Protocol 2000, and to incorporate container loss response following the MV Rena grounding of October 2011 on Astrolabe Reef in the Bay of Plenty, New Zealand, the largest pollution incident in New Zealand history.

Substantive obligations of the parent Convention

The parent Convention imposes obligations across six substantive areas, which Article 5 identifies as the principal threats to the natural resources and environment of the South Pacific Region.

Pollution from ships: Article 6 obliges Parties to take all appropriate measures to prevent, reduce and control pollution of the Convention area from any source and to use the best practicable means available for this purpose. For vessel-source pollution this means adopting and implementing the international rules established through the IMO, in particular MARPOL and SOLAS, as the minimum standard, with Parties free to adopt more stringent measures within their national jurisdiction. The PSSA regime for the Great Barrier Reef and Torres Strait is the most operationally significant expression of this authority in the Convention area.

Pollution from dumping: Article 9 expressly prohibits the dumping of wastes and other matter into the Convention area except in accordance with the rules, standards and recommended practices established by competent international organisations and as further defined by the Dumping Protocol. The Protocol’s Annex I black list implements the Article 9 prohibition at the detailed level.

Pollution from land-based sources: Article 7 obliges Parties to take all appropriate measures to prevent, reduce and control pollution of the Convention area from land-based sources, including rivers, estuaries, coastal installations and outfall structures. This is the Convention’s least-developed substantive obligation: no Protocol on land-based sources has been negotiated, unlike the Cartagena, Barcelona and OSPAR regimes which each have a land-based-sources protocol. The absence reflects the political sensitivity of imposing land-based discharge standards on sovereign states whose land-based regulatory capacity varies from Australia’s federal environmental regime to some of the least-resourced administrations in the world.

Pollution from seabed activities: Article 8 obliges Parties to take all appropriate measures to prevent, reduce and control pollution arising from seabed activities subject to their jurisdiction. This provision became operationally significant in the 2010s with the emergence of the deep-seabed mining proposals in the PNG Manus Basin and the Cook Islands Penrhyn Basin, providing the Convention-level framework within which the environmental assessment and monitoring obligations apply.

Airborne pollution: Article 10 obliges Parties to take all appropriate measures to prevent, reduce and control pollution of the Convention area resulting from discharges into the atmosphere from activities under their jurisdiction or control. In 2026 this provision is read alongside the IMO 2020 0.50% global sulphur cap under MARPOL Annex VI, making it relevant to all vessel transits of the Convention area under MARPOL Annex VI.

Specially protected areas: Article 14 obliges Parties to take appropriate measures to protect and preserve rare and fragile ecosystems and the habitat of depleted, threatened or endangered flora and fauna, including establishment of protected areas. This article provides the Convention-level legal basis for the Great Barrier Reef Marine Park, the Phoenix Islands Protected Area, the Coral Sea Marine Park and the Cook Islands Marine Park, all of which constitute implementation of Article 14 obligations within each Party’s jurisdiction.

Waigani Convention 1995: a distinct instrument

A frequent point of confusion is between the Noumea Convention framework and the Waigani Convention 1995. The two are separate treaties with different negotiating histories, different Parties and different scopes.

The Convention to Ban the Importation into Forum Island Countries of Hazardous and Radioactive Wastes and to Control the Transboundary Movement and Management of Hazardous Wastes within the South Pacific Region (the Waigani Convention) was adopted in Waigani, Papua New Guinea on 16 September 1995 and entered into force on 21 October 2001. It is a standalone treaty negotiated through the Pacific Islands Forum and modelled on the Basel Convention 1989 on hazardous waste, adapted for the Pacific context to ban the import of hazardous and radioactive wastes into Forum Island Countries from outside the region.

The Waigani Convention is not a Protocol to the Noumea Convention. It is administered separately from the SPREP Secretariat. Its Parties are the Forum Island Countries plus Australia and New Zealand; France and the United States are not Parties. The Convention’s practical effect is a regional ban on waste-import flows into PICs, complementing the Noumea Dumping Protocol’s prohibition on marine dumping of the same categories of material. The two instruments reinforce each other but must not be conflated.

Treaty of Rarotonga 1985 (SP Nuclear Free Zone) linkage

The South Pacific Nuclear Free Zone Treaty, the Treaty of Rarotonga, was opened for signature at Rarotonga, Cook Islands on 6 August 1985 (deliberately on the fortieth anniversary of the Hiroshima bombing) and entered into force on 11 December 1986. The Treaty was negotiated through the Pacific Islands Forum and signed sixteen months ahead of the Noumea Convention; the two instruments are administratively independent (the Rarotonga Treaty is administered by the PIF Secretariat, the Noumea Convention by the SPREP Secretariat) but operationally linked through the regional precautionary approach to radioactive contamination.

The Rarotonga Treaty prohibits within its zone (which closely matches the Noumea Convention area, with minor differences at the boundaries):

• Manufacturing, acquisition, possession or control of nuclear weapons by any party;
• Stationing of nuclear weapons by any party;
• Testing of nuclear weapons by any party;
• Dumping at sea of radioactive waste, which is the direct counterpart of the Noumea Dumping Protocol prohibition.

The Treaty has three Protocols extending obligations to nuclear-weapon states. Protocol 1 (commitment by states with territories in the zone, namely France, the United Kingdom and the United States, to apply Treaty prohibitions in those territories) was signed by France, the UK and the US in 1996 after extended diplomatic friction. Protocol 2 (negative security assurances by nuclear-weapon states) was signed by China, France, Russia and the UK with the US signing in 1996 but with US Senate ratification still pending as of 2026. Protocol 3 (commitment not to test in the zone) was signed by the same five nuclear-weapon states.

The Rarotonga-Noumea linkage is operationally most significant in the Dumping Protocol prohibition on radioactive dumping (Noumea Dumping Protocol Annex I) and in the regional opposition to the 1995 French Mururoa testing resumption (the only nuclear testing in the zone after the Treaty entered into force, with six underground tests from September 1995 to January 1996 prompting a region-wide diplomatic backlash and contributing to France’s signature of Protocol 1 in March 1996).

Wellington Convention 1989: driftnet ban linkage

The Convention for the Prohibition of Fishing with Long Driftnets in the South Pacific, the Wellington Convention, was opened for signature at Wellington on 24 November 1989 (precisely three years after the Noumea Convention) and entered into force on 17 May 1991. The Wellington Convention prohibits the use of driftnets longer than 2.5 km in the South Pacific Convention area, an instrument originally targeted at Japanese, Korean and Taiwanese high-seas driftnet fleets that had operated in the South Pacific tuna and billfish fisheries through the late 1980s with very high bycatch of marine mammals, sea turtles and seabirds.

The Wellington Convention is the regional implementation of UN General Assembly Resolution 44/225 (1989) which called for a global moratorium on large-scale pelagic driftnet fishing, and which led to UN General Assembly Resolution 46/215 (1991) imposing a global moratorium effective 31 December 1992. The Wellington Convention has two Protocols: Protocol 1 (extending prohibitions to nationals and vessels of distant-water fishing parties, signed by the United States in 1990) and Protocol 2 (extending prohibitions to additional South Pacific states, signed by Canada, Chile and Tokelau).

The relationship between the Wellington Convention, the Noumea Convention and the Pacific Islands Forum Fisheries Agency is a useful illustration of the regional regime layering that characterises South Pacific environmental governance: the Noumea Convention provides the framework for the marine environment; the Wellington Convention provides the specific gear-restriction obligations; the FFA provides the operational fisheries management; and the Pacific Islands Forum provides the political coordination across all three.

Climate change + sea-level rise: existential threat to atoll states

For the low-lying atoll states of the Pacific (Tuvalu, Kiribati, the Marshall Islands and the Cook Islands northern atoll group), climate change is not a long-term policy challenge but an existential question of national survival within the lifetime of children currently in school. Mean sea level in the western tropical Pacific has risen at approximately 3 to 4 mm per year since 1993 (about double the global average due to Pacific Decadal Oscillation dynamics) and the IPCC AR6 projections for SSP5-8.5 indicate 0.6 to 1.1 m of additional rise by 2100, with 2 to 5 m by 2300 if the Antarctic Marine Ice Sheet Instability scenarios materialise.

The atoll states are characterised not only by low elevation (see next section) but by freshwater lens vulnerability: the freshwater that supports island habitation comes from a Ghyben-Herzberg lens of fresh water floating on saline groundwater, with the lens thickness approximately 40 times the elevation above mean sea level. As mean sea level rises and storm surges erode the atoll perimeter, the freshwater lens shrinks faster than the land area shrinks, and inhabitability is lost well before submergence in the strict cartographic sense.

The Noumea Convention has emerged through the 2010s and 2020s as the primary regional environmental instrument under which the climate-resilience agenda is coordinated. The 2015 Suva Declaration on Climate Change (PIF), the 2050 Strategy for the Blue Pacific Continent (PIF 2022), the 2024 Pacific Climate Resilience submissions to UNFCCC and the SPREP Pacific Climate Change Centre programme all reference the Noumea Convention as the underlying legal anchor for the marine and coastal-environment dimension of climate response. The Noumea Convention COP has adopted formal climate-resilience decisions at its meetings since 2010, although the Convention text itself does not explicitly reference climate change (it pre-dated the UNFCCC by six years).

Tuvalu, Kiribati, Marshall Islands: average elevation below 2 m

The three states most at existential climate risk in the Convention area share an average land elevation below 2 metres above mean sea level: Tuvalu at approximately 1.83 m, Kiribati atolls at approximately 1.8 m and the Marshall Islands at approximately 1.8 m.

Tuvalu is a country of nine islands totalling 26 km² with a population of approximately 11,000, of which the capital atoll Funafuti holds approximately 6,000. The highest natural elevation is approximately 4.6 m at a point on Niulakita Island. The Te Falepili Union Treaty (Australia-Tuvalu 2023) established a bilateral climate-mobility pathway for Tuvaluan citizens facing climate displacement, the first such bilateral treaty in international law. It is a precedent that may extend to Kiribati and the Marshall Islands through equivalent arrangements with other metropolitan powers.

Kiribati is a country of 33 atolls and reef islands totalling 811 km² distributed across approximately 3,550,000 km² of EEZ, with a population of approximately 130,000. The country spans the equator and the International Date Line and includes the Phoenix Islands Protected Area. The capital, South Tarawa, holds approximately 64,000 people on 16 km², one of the most densely populated places on Earth. Kiribati’s 2014 purchase of land in Fiji (the Vanua Levu Natoavatu estate, approximately AUD 9.6 million) was symbolically important as a precautionary climate-displacement land bank, though the land is currently used for agricultural purposes.

The Marshall Islands is a country of 29 atolls and 5 raised coral islands totalling 181 km² with a population of approximately 42,000 spread across approximately 2,100,000 km² of EEZ. The country also carries the nuclear legacy of 67 US nuclear tests at Bikini Atoll and Enewetak Atoll between 1946 and 1958, with the Castle Bravo test of 1 March 1954 (15 megatons, the largest US nuclear test) producing the Lucky Dragon Five fallout incident and the long-term displacement of the Bikini and Rongelap atoll populations.

Coral bleaching: 2016, 2017, 2022 and 2024 events

The South Pacific has experienced four region-wide mass coral bleaching events in the eleven years from 2016 to 2026, an unprecedented frequency in the available paleo-coral and modern-monitoring records:

• 2016 mass bleaching event: triggered by the 2015-2016 super El Niño, with NOAA Coral Reef Watch recording Degree Heating Weeks (DHW) values exceeding 12 across northern Great Barrier Reef sectors and across Fiji and the Solomon Islands. The Great Barrier Reef lost approximately 30 percent of shallow-water coral in its northern third, the most severe coral mortality recorded in the Reef’s modern history at that point.
• 2017 mass bleaching event: an unusual second consecutive year of bleaching driven by residual ocean heat, affecting principally the central Great Barrier Reef and parts of New Caledonia. Combined with 2016, the two-year sequence reduced shallow-water coral cover across the Reef by approximately 50 percent.
• 2022 mass bleaching event: occurred under La Niña conditions for the first time in instrumental history, affecting the southern Great Barrier Reef and parts of Fiji and Tonga. The 2022 event demonstrated that bleaching is no longer dependent on El Niño-phase ocean heat.
• 2024 mass bleaching event: NOAA confirmed a fourth global coral bleaching event spanning 2023-2024 across all three ocean basins, the most extensive on record. Aerial and in-water surveys recorded bleaching across more than 66 percent of the Great Barrier Reef with mortality assessments still in progress as of mid-2026.

The cumulative effect of the 2016, 2017, 2020, 2022 and 2024 events on Great Barrier Reef coral cover is approximately a 60 percent reduction in shallow-water coral since 2000, a finding that informed the 2021 World Heritage Committee in-danger listing recommendation and that constitutes the principal evidentiary basis for the 2024 South Pacific PSSA expansion proposal under MEPC review.

Nuclear legacy: Bikini, Mururoa and Fangataufa

The Convention area carries one of the most substantial nuclear-test legacies on Earth, distributed across three principal sites:

• Bikini Atoll and Enewetak Atoll, Marshall Islands: 67 US nuclear tests between 1946 and 1958 including the Castle Bravo test of 1 March 1954 (15 megatons fission-fusion-fission, with fallout reaching the Japanese fishing vessel Daigo Fukuryū Maru “Lucky Dragon Five” at 130 km distance). The Bikini and Rongelap populations were forcibly relocated and have not been able to return permanently due to residual caesium-137 in the local food chain. Bikini Atoll was inscribed on the UNESCO World Heritage List in 2010 as a site of nuclear-test history.
• Mururoa Atoll and Fangataufa Atoll, French Polynesia: 193 French nuclear tests between 1966 and 1996, of which 41 atmospheric (1966-1974) and 152 underground (1975-1996). The 1995-1996 testing series under President Jacques Chirac (six tests) produced the most acute regional diplomatic crisis since the Rainbow Warrior sinking, with EU sanctions imposed on French goods and a Pacific Islands Forum diplomatic boycott of France. France ended testing on 27 January 1996 and signed the Comprehensive Nuclear-Test-Ban Treaty (CTBT) on 24 September 1996.
• Christmas Island (Kiritimati) and Malden Island, Kiribati: 31 UK and US nuclear tests between 1957 and 1962 (Operation Grapple by the UK at Malden 1957-1958 and Operation Dominic by the US at Christmas Island 1962). Residual radioactivity is detectable, and the long-term health implications for UK and Fijian military veterans of the Grapple tests have been the subject of UK Government compensation programmes since 2022.

The Noumea Convention Dumping Protocol prohibition on radioactive waste dumping and the parallel Treaty of Rarotonga prohibition on nuclear testing collectively close the regional door to further radioactive contamination of the basin, but the legacy contamination management of Bikini, Mururoa, Fangataufa, Christmas Island and the Marshall Islands fallout zone remains an ongoing operational obligation under the Convention’s land-based-sources article and the SPREP Pacific Marine Climate Change Cooperative.

Plastic pollution: Henderson Island accumulation site

Henderson Island is a 37 km² uninhabited raised coral atoll in the Pitcairn Islands group, a UK Overseas Territory, located at 24°22’S 128°20’W in the eastern South Pacific. The island was inscribed on the UNESCO World Heritage List in 1988 for its endemic biodiversity (it has four endemic land bird species and approximately 70 endemic plant species) and is one of the few raised coral atolls in the world to have escaped human modification.

A 2017 study by Lavers and Bond (published in Proceedings of the National Academy of Sciences) found that the East Beach of Henderson Island carried approximately 38 million plastic items (about 18 tonnes), the highest density of plastic debris recorded on any beach in the world at that time. The plastic is sourced from the South Pacific gyre convergence and includes items traceable to 24 countries by manufacturer marks, dominated by Asian and South American sources. A 2019 follow-up study found accumulation rates of approximately 3,500 items per day on a single 10 m beach transect, indicating ongoing gyre delivery.

Henderson Island has become the most-cited single example of the transboundary nature of marine plastic pollution and the futility of beach-by-beach cleanup in the absence of source-control measures. The 2018 SPREP Cleaner Pacific 2025 strategy and the 2022 SPREP Pacific Regional Action Plan: Marine Litter 2018-2025 (now under revision for the 2026-2035 period) explicitly cite Henderson Island as the regional emblem of the source-to-sea plastic challenge, and Pacific delegations used it as a recurring reference point during the 2023 Global Plastics Treaty negotiations (the INC-3 Nairobi 2023 and subsequent rounds).

IUU fishing + PNA Vessel Day Scheme

Illegal, unreported and unregulated (IUU) fishing in the Western and Central Pacific tuna fishery is one of the most economically and ecologically significant maritime environmental challenges in the Convention area. The basin contains the world’s largest tuna fishery: the Western and Central Pacific Fisheries Commission (WCPFC) area produces approximately 2.5 million tonnes of tuna per year, equivalent to 55 percent of global tuna catch, dominated by the skipjack tuna (Katsuwonus pelamis) catch in the equatorial purse-seine fishery.

The Parties to the Nauru Agreement (PNA), established in 1982 and comprising eight equatorial-zone states (FSM, Kiribati, Marshall Islands, Nauru, Palau, PNG, Solomon Islands and Tuvalu) plus Tokelau, manage the Vessel Day Scheme (VDS) for the purse-seine tuna fishery. The VDS replaced the previous catch-per-unit-effort regime in 2010 with a fixed total allowable effort measured in fishing days, allocated to PNA member states by historical share and tradeable between member states under the Total Allowable Effort ceiling. The VDS has approximately doubled the access fee revenue to PNA states from approximately USD 60 million per year before 2010 to approximately USD 500 million per year by 2024, the most successful rights-based fisheries management outcome among small island developing states globally.

The IUU fishing residual after the VDS is monitored through the Forum Fisheries Agency (FFA) Vessel Monitoring System, the Pacific Maritime Surveillance Programme (PMSP), the Quadrilateral Defence Coordination Group (Australia, NZ, France, US) maritime patrol contributions and satellite-based AIS dark-vessel detection. The 2023 FFA estimate of regional IUU value is approximately USD 333 million per year, principally Asian distant-water fleets violating zone access licences. The Noumea Convention’s role on IUU fishing is environmental rather than fisheries-management (which is the FFA’s mandate), focusing on the marine-pollution and bycatch dimensions of IUU operations.

Seabed mining: PNG Solwara 1, Cook Islands and opposition

Deep-seabed mining has emerged through the 2010s and 2020s as one of the most divisive environmental issues in the Convention area, with PIC governments split between developing seabed mineral resources within national EEZs and supporting a regional and global moratorium.

The principal sites: PNG Solwara 1 was a seafloor massive sulphide (SMS) project in the Manus Basin of the Bismarck Sea, approximately 50 km off New Ireland, awarded a 20-year mining licence by the PNG Government in 2011. Developer Nautilus Minerals entered insolvency in November 2019 and the project was suspended; the licence is currently dormant. The Cook Islands Penrhyn Basin holds an estimated 6.7 billion wet tonnes of polymetallic manganese nodules within the Cook Islands EEZ, with three exploration licences granted in 2022; commercial extraction depends on completing a regional environmental impact assessment projected for late 2027 to 2028. The Nauru-sponsored Metals Company project (NORI) in the Clarion-Clipperton Zone (CCZ) of the central Pacific lies outside the Noumea Convention area but remains entangled in Pacific regional politics, with ISA mining regulations still incomplete as of 2026.

The opposition to seabed mining is led by Vanuatu (national moratorium 2019), Palau (national ban 2022), FSM (national moratorium 2022), Fiji (10-year moratorium 2022), Tuvalu (national moratorium 2022) and Samoa (national moratorium 2023). The 2024 Pacific Islands Forum Leaders’ Communiqué noted divergent national positions but did not reach a regional consensus moratorium, with Cook Islands, Kiribati, Nauru and PNG dissenting. The Noumea Convention has been raised at COP level as a candidate vehicle for a regional precautionary moratorium, but no protocol has been adopted as of 2026.

Great Barrier Reef and Torres Strait PSSA (in convention area)

The Great Barrier Reef Particularly Sensitive Sea Area is the world’s first IMO-designated PSSA and the largest in the Convention area, designated by IMO Resolution MEPC.44(30) in November 1990 and extended by MEPC.133(53) in July 2005 to incorporate the Torres Strait between Cape York Peninsula and southern PNG, with the Coral Sea component associated with MEPC.222(64) in October 2012. The PSSA encompasses approximately 400,000 km² of reef, lagoon and inter-reef channel and is administered through the Great Barrier Reef Marine Park Authority (GBRMPA) with the associated Australian and Torres Strait pilotage and routeing measures.

The associated protective measures (APMs) include:

• Compulsory pilotage for vessels of 70 m or more LOA and for tankers, chemical tankers and gas carriers regardless of length, in the Inner Route, the Hydrographers Passage and the Torres Strait (Torres Strait pilotage expanded to compulsory in 2006 with some legal disputes about freedom of navigation under UNCLOS Article 38);
• Two-way routeing through the Inner Route with mandatory ship reporting through REEFREP;
• Areas to Be Avoided (ATBAs) including the Coringa-Herald and Lihou Reef ATBAs in the Coral Sea component;
• Speed restrictions in defined sectors during dugong and sea turtle critical periods.

The Great Barrier Reef PSSA is the principal IMO-level expression of the Noumea Convention’s environmental priorities applied to international shipping and is the primary precedent under consideration for the 2024 South Pacific PSSA expansion proposal (see below). The PSSA is also the IMO benchmark example in MEPC Guidelines for the Identification and Designation of Particularly Sensitive Sea Areas (2005) training material.

Phoenix Islands Protected Area (Kiribati 2008)

The Phoenix Islands Protected Area (PIPA) is a 408,250 km² marine protected area in the Phoenix Islands group of Kiribati, declared by the Government of Kiribati in March 2006 and gazetted in August 2008, comprising the EEZ around the eight uninhabited Phoenix Islands plus their associated reefs and seamounts. PIPA was inscribed on the UNESCO World Heritage List in 2010 as the first MPA on the World Heritage List, and at its declaration was the largest MPA on Earth, a record later exceeded by Papahānaumokuākea (Hawaii, 2006/2016 expansion to 1,510,000 km²), the Cook Islands Marine Park (2017, 1,976,000 km²) and others.

PIPA has been the principal regional case study for large-scale MPA financing. The PIPA Trust was established in 2009 with seed funding from Conservation International and the New England Aquarium, with the financing model designed to compensate the Government of Kiribati for foregone fisheries access fees at a level approximately equivalent to historical purse-seine revenue from the area. The Trust target was approximately USD 50 million to provide perpetual annual income matching foregone access fees; actual capitalisation has been below target, and PIPA was opened to commercial fishing in 2014 by the Government of Kiribati under President Taneti Maamau, with partial closure restored in 2022 after review.

The PIPA opening-and-closure trajectory has become a foundational case study in the economics of large-scale ocean conservation in small island states, illustrating that MPA designation alone does not guarantee enforcement without a sustainable financing mechanism that compensates the host state for foregone economic activity at par with the prevailing access-fee market price.

Pacific Islands Forum (PIF) coordination

The Pacific Islands Forum is the principal political body of the South Pacific, founded as the South Pacific Forum at Wellington in August 1971 and renamed in 2000. The Forum has 18 members as of 2026: the 14 independent PICs (Cook Islands, FSM, Fiji, Kiribati, Marshall Islands, Nauru, Niue, Palau, PNG, Samoa, Solomon Islands, Tonga, Tuvalu and Vanuatu) plus Australia, New Zealand, French Polynesia and New Caledonia (the last two as full members from 2016 with French Government concurrence).

The Forum Secretariat is in Suva, Fiji and is led by a Secretary General appointed by Forum Leaders. The Forum coordinates the Council of Regional Organisations of the Pacific (CROP) which integrates SPREP, the Pacific Community (SPC), the Forum Fisheries Agency (FFA), the University of the South Pacific (USP), the Pacific Aviation Safety Office (PASO), the Pacific Power Association (PPA) and other regional bodies, providing the political-coordination layer above the operational-delivery layer.

The Forum’s environmental and ocean-governance agenda is dominated by climate change (the 2015 Suva Declaration, the 2018 Boe Declaration on Regional Security, the 2050 Strategy for the Blue Pacific Continent), ocean security (the Pacific Ocean Alliance, the 2024 Maritime Boundary Declaration of Permanence), seabed mining (the divergent national positions described above) and climate finance (the Pacific Resilience Facility). The PIF and the Noumea Convention regime are operationally integrated through cross-membership, joint Council meetings of CROP-Plus and shared technical work programmes, with the Forum providing the political coordination and SPREP providing the technical environmental coordination.

Pacific Islands Forum Fisheries Agency (FFA)

The Pacific Islands Forum Fisheries Agency was established by the South Pacific Forum Fisheries Agency Convention (Honiara Convention) of 10 July 1979 and entered into force on 9 August 1979. The FFA Secretariat is in Honiara, Solomon Islands and the FFA membership is 17 PIF members (excluding French Polynesia and New Caledonia which retain French metropolitan fisheries jurisdiction). The FFA’s mandate is regional co-operation on fisheries management, principally in the Western and Central Pacific tuna fishery, complementary to the Vessel Day Scheme administered by the PNA and the regional management body Western and Central Pacific Fisheries Commission (WCPFC) established by the Honolulu Convention 2000 (in force 2004).

The FFA operates the Regional Vessel Monitoring System (VMS) which tracks all licensed fishing vessels in the WCPFC area in near-real-time, the FFA Compliance Index which measures member-state and distant-water-fleet performance against access-licence terms, and the FFA Aerial Surveillance Programme which complements PMSP maritime patrols by Australia, NZ, France and the US.

The FFA is the operational counterpart to the Noumea Convention on the fisheries-environmental interface. The Convention provides the marine-environmental framework, the FFA provides the fisheries management, and the Honiara Strategy on Maritime Surveillance (2017, revised 2024) provides the surveillance integration. The 2024 strategy revision incorporated dark-vessel detection, AIS spoofing analytics and transhipment-at-sea controls, all within the broader Convention regime.

2050 Strategy for the Blue Pacific Continent

The 2050 Strategy for the Blue Pacific Continent was endorsed at the 51st Pacific Islands Forum at Suva in July 2022 as the long-term political vision for the Pacific region. The Strategy renames and reframes the regional space from “small island developing states” to “Large Ocean States” and from “Pacific Islands region” to “Blue Pacific Continent”, articulating seven thematic areas: political leadership and regionalism; people-centred development; peace and security; resource and economic development; climate change and disasters; ocean and natural environment; and technology and connectivity.

The Strategy’s ocean and natural environment thematic area is administered through SPREP and the Noumea Convention and covers: climate-resilient marine and coastal ecosystems; sustainable management of fisheries and aquaculture in co-ordination with FFA, PNA and WCPFC; ocean conservation including MPA expansion and the 30-by-30 target under the Kunming-Montreal Global Biodiversity Framework (December 2022); pollution prevention and waste management including the Global Plastics Treaty negotiations; and ocean science and technology through SPC and the regional university system.

The 2050 Strategy is operationally delivered through the Pacific Roadmap on Climate Action (2024), the Pacific Regional Marine Litter Action Plan 2026-2035 (under negotiation), the Pacific Regional Marine Spatial Planning Initiative (2024) and the Blue Pacific Continent Ocean Science Plan (under SPREP-SPC joint development). The Strategy explicitly references the Noumea Convention as the legal anchor for the marine-environmental dimension.

2024 Pacific Climate Resilience UNFCCC submissions

The 2024 Pacific Climate Resilience submissions to the UNFCCC were a coordinated set of submissions by the 14 PIF PICs at UNFCCC COP29 (Baku, November 2024) and the Bonn intersessional sessions of June 2024, focusing on:

• Operationalisation of the Loss and Damage Fund (decided at COP27 Sharm-el-Sheikh 2022, launched at COP28 Dubai 2023, with capitalisation negotiations ongoing through 2024-2026);
• The 1.5°C limit as a survival threshold for atoll states, reaffirmed in Paris Agreement Article 2(1)(a) but increasingly at risk under IPCC AR6 SSP scenarios;
• The Pacific Climate Resilience Investment (PCRI) framework for blending Loss and Damage Fund disbursements with Green Climate Fund and bilateral finance;
• Maritime boundaries permanence (the 2024 PIF Maritime Boundary Declaration of Permanence) which holds that EEZ baselines as gazetted under UNCLOS shall remain permanent regardless of subsequent shoreline changes due to sea-level rise, a precautionary doctrinal innovation specific to atoll states.

The submissions were anchored in the Noumea Convention regime through SPREP co-ordination of the technical underpinnings (oceanographic monitoring, sea-level data, coastal vulnerability assessments) and through PIF co-ordination of the political messaging. The maritime-boundaries-permanence doctrine is particularly significant for the Convention area because EEZ permanence preserves the legal basis for fisheries access fees, which are the principal national income source for several atoll states.

2024 IMO South Pacific PSSA expansion (under review)

The 2024 South Pacific PSSA expansion proposal is a co-ordinated submission to the IMO Marine Environment Protection Committee by Australia, New Zealand and several Pacific Island Countries, building on the precedent of the Great Barrier Reef PSSA and the 2005 Galápagos PSSA. The proposal as submitted to MEPC 81 (March 2024) comprises:

• An expanded Great Barrier Reef and Torres Strait PSSA to incorporate additional Coral Sea sectors and to formalise the 2012 informal extensions;
• A new Vatu-i-Ra and Lomaiviti PSSA in central Fiji, a region of high coral biodiversity and traditional iqoliqoli (customary fishing ground) management;
• A new Pacific Islands Region PSSA covering the central and equatorial Pacific tuna fishery zones with a focus on transhipment-at-sea controls and discharge restrictions.

The proposal is under MEPC review as of 2026. The more probable trajectory is sector-by-sector adoption over the 2025-2028 horizon rather than adoption in full at any single MEPC session. The proposal represents the most ambitious regional-scale environmental measure yet brought to the IMO under the Noumea Convention regime and consolidates more than a decade of precautionary regional environmental policy into formal IMO routeing and discharge measures.

BBNJ Treaty 2023 implementation

The Agreement under the United Nations Convention on the Law of the Sea on the Conservation and Sustainable Use of Marine Biological Diversity of Areas beyond National Jurisdiction, the BBNJ Agreement or High Seas Treaty, was adopted by consensus at the UN on 19 June 2023 and opened for signature on 20 September 2023. The Treaty addresses marine biological diversity in areas beyond national jurisdiction (the high seas and the deep seabed beyond EEZs), which constitutes approximately two-thirds of the global ocean by area and which had previously been governed only fragmentarily under UNCLOS Part XII and the regional fisheries management organisations.

The BBNJ Treaty has four substantive pillars: marine genetic resources including digital sequence information, with a multilateral benefit-sharing mechanism; area-based management tools including marine protected areas in the high seas; environmental impact assessment for activities in the high seas with potentially significant environmental effects; and capacity-building and transfer of marine technology with particular focus on developing-state participation.

The PIF members were among the most active negotiating blocs in the BBNJ negotiations through the G77 plus China and the Pacific Small Island Developing States group. The Noumea Convention regime is expected to play an important role in BBNJ Treaty implementation in the South Pacific high seas, particularly in the area-based management tools pillar where the existing regional architecture (Convention, Protocols, SPREP Council, Pacific Islands Forum) provides the institutional backbone for high-seas MPA designation and management. The Treaty entered into force after 60 ratifications; as of mid-2026 the ratification count had crossed the threshold and the Treaty is in early operationalisation under the Preparatory Commission established by UN General Assembly Resolution 78/272.

Comparison: Lima Convention 1981 (parallel SE Pacific)

The Noumea Convention and the Lima Convention 1981 are the two regional sea conventions covering the Pacific Ocean, with adjacent but non-overlapping geographic envelopes: Lima covers the South-East Pacific margin of South America (Panama to Cape Horn) and Noumea covers the South Pacific oceanic interior (equator to 30°S, 130°E to 120°W). The two regimes differ in scope and structure:

• Membership: Lima has 5 Spanish-speaking continental coastal states; Noumea has 22 Parties spanning Polynesia, Melanesia, Micronesia and the metropolitan powers, with 14 independent PICs.
• Geography: Lima is a 10,000 km coastal margin; Noumea is a 30+ million km² oceanic interior.
• Protocols: Lima has 6 Protocols (5 in force); Noumea has 2 Protocols (both in force).
• Secretariat: Lima at CPPS Guayaquil; Noumea at SPREP Apia.
• Founding regional body: Lima follows the 1952 Santiago Declaration and the CPPS; Noumea follows the 1971 South Pacific Forum and the 1982 SPREP.
• Dominant economic base: Lima is fisheries (Humboldt anchoveta), mining (Chilean copper, Peruvian gold) and shipping (Panama Canal, Valparaíso); Noumea is tuna fisheries, tourism (Australia, Fiji, French Polynesia) and shipping (Australian iron and coal ports, the southern hemisphere component of the trans-Pacific container trades).

The two regimes co-operate on shared issues including PSSA designations (Galápagos in Lima, Great Barrier Reef in Noumea), IUU fishing surveillance, Pacific climate resilience and the 2030 Sustainable Development Goals ocean targets.

Comparison: Antigua Convention 2002 (parallel NE Pacific)

The Noumea Convention and the Antigua Convention 2002 are the two regional sea conventions covering the Pacific Ocean beyond the equator (with Lima covering south of the equator on the South American side). The Antigua Convention covers the North-East Pacific from the southern boundary of Mexico to the southern boundary of the United States (the Mexican, Costa Rican, Panamanian and Northern Central American Pacific coast) and is the regional sea convention of the Comisión Centroamericana de Ambiente y Desarrollo (CCAD) member states. The Antigua Convention was adopted in Antigua, Guatemala on 18 February 2002 and as of 2026 has not yet entered into force (it requires three ratifications and has only one to date), making it the only UNEP regional sea convention not yet in force as of 2026.

The Noumea-Antigua comparison is useful primarily as a counterpoint: the Noumea regime entered into force four years after signature and has 22 Parties; the Antigua regime has been in pre-entry-into-force limbo for 24 years and has 7 signatories. The contrast reflects the political coherence of the SPREP regional architecture compared to Central America, where regional environmental co-ordination has been less centralised and where the CCAD has cycled through several rounds of organisational reform since 2002.

Comparison: Cartagena Convention 1983 (parallel Wider Caribbean)

The Noumea Convention and the Cartagena Convention 1983 are the two regional sea conventions covering tropical and subtropical island-and-archipelago seas with diverse multi-state Parties: Cartagena for the Wider Caribbean Region (WCR) and Noumea for the South Pacific. The two regimes share several structural features:

• Mixed metropolitan-and-island membership: Cartagena has 25 Parties combining the Caribbean island states with the metropolitan powers (UK, France, Netherlands) and the United States; Noumea has 22 Parties with the equivalent mixed structure.
• Tropical-cyclone-vulnerable basin: both basins are subject to tropical cyclone seasons (June-November in the WCR, November-April in the South Pacific) which dominate marine emergencies.
• Plastic-pollution loading from outside the basin: Cartagena receives Mississippi-mouth plastic via the Loop Current; Noumea receives gyre-delivered plastic at Henderson Island and similar accumulation sites.
• Diverse subregional groupings: Cartagena has CARICOM, OECS, Greater Antilles; Noumea has Polynesia, Melanesia, Micronesia.

The principal differences are in the mainland coastal states (Cartagena includes Mexico, Central America, Colombia and Venezuela; Noumea includes Australia and New Zealand only as continental Parties) and in the enclosed-versus-open character of the basin (Cartagena is a largely-enclosed semi-Mediterranean basin; Noumea is an open-ocean theatre on continental scale). The two regimes co-ordinate through the UNEP Regional Seas Programme global meetings and through Caribbean Environment Programme and SPREP joint workshops held biennially since 2010.

2030 outlook: Blue Pacific Continent, BBNJ and climate resilience

The 2030 outlook for the Noumea Convention regime is dominated by three converging trajectories.

First, the 2050 Blue Pacific Continent strategy operationalisation through the 2030 mid-term review at the PIF. The 2030 review will likely include a third Protocol under negotiation (possibly on land-based sources in line with the Cartagena LBS Protocol pattern, or on plastic pollution in line with the global Plastics Treaty implementation) and an updated Action Plan for the 2030-2040 period.

Second, the BBNJ Treaty operationalisation in the South Pacific high seas through SPREP-led regional designation processes. The most likely first BBNJ MPA in the Convention area would be a South Pacific Tuna Closure in seasonal skipjack spawning grounds, integrating the WCPFC fisheries-management mandate with the BBNJ biodiversity-protection mandate. Discussions at the SPREP 32nd Meeting (Apia, September 2025) signalled regional consensus on prioritising South Pacific BBNJ implementation.

Third, the climate-resilience long emergency as the dominant strategic driver, with continued sea-level rise, coral bleaching, tropical cyclone intensification and freshwater-lens degradation across the atoll states. The Falepili Union (Australia-Tuvalu 2023) is likely to be replicated through bilateral arrangements between Pacific atoll states and metropolitan powers (New Zealand-Tuvalu, US-Marshall Islands and FSM under Compacts of Free Association renewals 2023-2025, Australia-Kiribati under negotiation), creating a bilateral climate-mobility architecture layered on top of the regional Noumea Convention environmental architecture.

The Convention itself has matured into a stable multi-decadal regional regime of the kind common to UNEP’s longer-running regional seas. The structural growth points are not in the Convention text itself but in the operational delivery layer through SPREP, the PIF, the FFA, the PNA, the WCPFC and the bilateral Falepili-style arrangements with metropolitan powers. The 2030 outlook is one of incremental Protocol expansion, deepening implementation and integration with the global climate, biodiversity and plastics regimes, rather than wholesale architectural change.

Limitations

The Noumea Convention does not apply to warships and government vessels in non-commercial service, although Article 2 commits Parties to ensure that such vessels act consistently with the Convention so far as is reasonable and practicable. This is particularly relevant for US Navy and Royal Australian Navy operations in the Convention area, and historically for the French Navy during the nuclear-testing period.

The Convention extends to internal waters of Parties only insofar as they have so notified the SPREP Secretariat, with the consequence that some major coastal lagoons (the Suva Lagoon in Fiji, the Funafuti Lagoon in Tuvalu, the Majuro Lagoon in the Marshall Islands) may be regulated under the Convention only by virtue of explicit notification. The atoll states have generally extended Convention coverage to their lagoons by COP decision since the early 2000s.

The Convention does not extend to the Antarctic Treaty Area south of 60°S, governed by the Antarctic Treaty System (Antarctic Treaty 1959, the Madrid Protocol on Environmental Protection 1991 in force 1998 and CCAMLR 1980 in force 1982). The southern boundary of the Noumea Convention area at 30°S therefore leaves an unregulated zone between 30°S and 60°S in the Tasman Sea and the South Pacific subantarctic transition. This gap is partially filled by CCAMLR in fisheries-management terms and by the bilateral Australian and New Zealand maritime authorities in pollution-response terms, but there is no regional environmental convention covering the 30°S to 60°S Pacific zone as of 2026.

The Convention does not regulate fisheries management directly. Regional fisheries arrangements are administered by the WCPFC (high-seas pelagic stocks), the PNA (purse-seine VDS), the FFA (regional surveillance and licensing), the South Pacific Regional Fisheries Management Organisation (SPRFMO) for non-tuna pelagics in the high seas south of 10°S, and the national authorities of each Party. The Convention’s role on fisheries is limited to environmental and bycatch dimensions.

The Henderson Island plastic accumulation illustrates the limits of the Convention regime: source control of pelagic plastic requires global rather than regional regulation. The Noumea Convention’s role on plastics is limited to regional response, beach cleanup support and global advocacy through Pacific delegations’ contributions to the Global Plastics Treaty negotiations.

The compliance and reporting mechanisms under the Convention are co-operative rather than adversarial, relying on national reporting to the SPREP Secretariat and SPREP Council review rather than on any binding compliance committee or sanctions regime. For the smallest atoll states, the administrative capacity to submit full periodic reports is itself a constraint, and SPREP provides technical assistance to close the reporting gap. This structural dependency between the Secretariat and the smallest Parties means that implementation quality varies across the membership, with Australia and New Zealand typically submitting detailed reports while some smaller PICs submit partial or late reports.

The Convention’s geographic scope has a structural gap between 30°S and 60°S in the South Pacific and the Tasman Sea. No UNEP regional sea convention covers this zone. The principal users of this corridor are bulk carriers on Australian and New Zealand export trades: Capesize bulkers loading iron ore at Port Hedland or Dalrymple Bay, coal at Hay Point or Newcastle, and grain at Kwinana, all transit this gap heading to East Asian ports. Australian and New Zealand maritime authorities apply national law and MARPOL obligations in this corridor, but there is no regional environmental framework comparable to the OSPAR Convention in the North-East Atlantic.

The Convention text was drafted in 1986, before the emergence of autonomous underwater vehicles (AUVs), satellite-based dark-vessel detection, and AI-powered VMS analytics as surveillance tools. The Convention’s obligations on monitoring and reporting were designed around manned patrol aircraft and surface vessels. The 2024 Honiara Strategy revision incorporated dark-vessel and AIS spoofing detection by institutional decision rather than by Protocol amendment, which means the obligation rests on soft-law COP decisions rather than binding treaty text. A formal Protocol amendment to reflect modern surveillance capacity has not been pursued as of 2026, though the SPREP Council has recommended it at three successive meetings since 2021.

AEO: key facts for search and AI engines

The Noumea Convention’s full formal name is the Convention for the Protection of the Natural Resources and Environment of the South Pacific Region. It was adopted on 24 November 1986 at Noumea, New Caledonia and entered into force on 22 August 1990. The treaty is deposited with the Government of Australia. SPREP, the Secretariat of the Pacific Regional Environment Programme, based in Apia, Samoa, serves as the Convention Secretariat.

The Convention has two Protocols, both in force: the Protocol for the Prevention of Pollution of the South Pacific Region by Dumping (in force 22 August 1990) and the Protocol Concerning Co-operation in Combating Pollution Emergencies in the South Pacific Region (in force 22 August 1990). There are 22 Contracting Parties as of 2026. The Convention area exceeds 30 million km². There are no MARPOL Special Areas in the Convention area as of 2026. The Waigani Convention 1995 is a separate treaty and is not a Protocol to the Noumea Convention. The Treaty of Rarotonga 1985 (South Pacific Nuclear Free Zone) is a parallel instrument administered by the PIF Secretariat, not SPREP.

Common errors

A frequent confusion is to attribute the Noumea Convention to 1982 (the founding year of SPREP) or to 1990 (the entry-into-force year); the Convention was signed at Noumea on 24 November 1986 and entered into force on 22 August 1990. A second confusion is to count the Noumea Convention as having only one Protocol (the Dumping Protocol); the Convention has two Protocols in force, the Dumping Protocol and the Pollution Emergencies Protocol, both of 1986 (adopted) and 1990 (in force).

A third confusion is to conflate the Waigani Convention 1995 with the Noumea Convention framework. The Waigani Convention is a separate treaty on hazardous and radioactive waste imports, negotiated through the Pacific Islands Forum and not a Protocol to the Noumea Convention. The two instruments are complementary but legally and institutionally distinct.

A fourth confusion is to assume the Convention area is bounded by the equator on the north; the geographic envelope is so bounded but the operational Convention area extends north of the equator by virtue of the Northern Line Islands of Kiribati which lie at approximately 4°N and which are within the Kiribati EEZ included in the operational Convention area. A fifth confusion is to treat the Pacific Islands Forum as the host of the Noumea Convention; the host is SPREP, and the PIF is the broader political body of which SPREP is one of the CROP regional organisations.

A sixth confusion is to assume the Convention area includes Hawaii or the Aleutians or other US Pacific territories north of the equator; the US is a Party for American Samoa, Guam and the Commonwealth of the Northern Mariana Islands only, with Hawaii outside the Convention area. A seventh confusion is to attribute the Galápagos PSSA to the Noumea Convention area; the Galápagos PSSA is in the Lima Convention area and is administered by Ecuador.

An eighth confusion is to assume there are MARPOL Special Areas in the Convention area; as of 2026 there are none, although the 2024 South Pacific PSSA expansion proposal could lead to associated discharge restrictions approaching Special Area severity at sectoral level. A ninth confusion is to attribute the 2050 Strategy for the Blue Pacific Continent to SPREP; the Strategy is a Pacific Islands Forum instrument adopted at Suva in 2022, with SPREP as an implementing partner for the marine-environmental dimension.

A tenth confusion is to treat the Great Barrier Reef PSSA as a Noumea Convention measure; the PSSA is an IMO measure designated under MARPOL and the SOLAS routeing system, with Australia as the proposing state. The Convention provides the regional environmental context but the legal basis of the PSSA is the IMO regime, not the Convention.

See also

• MARPOL Convention
• MARPOL Annex I oil pollution prevention
• MARPOL Annex I Reg 15 oil discharge criteria
• Lima Convention 1981
• Antigua Convention 2002
• Cartagena Convention 1983
• Helsinki Convention 1992
• Bucharest Convention 1992
• Barcelona Convention 1976/1995
• OSPAR Convention 1992
• Tehran Convention 2003
• Kuwait-ROPME Convention 1978
• Jeddah Convention 1982
• Abidjan Convention 1981
• Nairobi Convention 1985
• PSSA overview
• Ballast Water Management Convention
• IMO 2020 sulphur cap
• Marine and environmental calculators

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