By ShipCalculators.com · Published 8 May 2026 · last updated 14 June 2026

IOPC Fund 1992: International Oil Pollution Compensation Fund

The International Oil Pollution Compensation Fund 1992 (commonly the IOPC Fund 1992 or Fund 1992) is the second tier of the international compensation regime for oil pollution damage from tankers. The Fund was established by the 1992 Fund Convention, the 1992 Protocol to the original 1971 Fund Convention, which entered into force on 30 May 1996 alongside CLC 1992. Where the registered shipowner’s liability under CLC 1992 is exhausted, where one of the closed defences in Article III applies, where no CLC certificate is in force, or where the shipowner is financially unable to meet the obligation, Fund 1992 steps in to compensate victims of pollution damage in the territory or exclusive economic zone of a Member State. The Fund is financed by annual contributions from oil receivers in Member States that import more than 150,000 tonnes of crude oil or heavy fuel oil per year by sea. The combined CLC plus Fund 1992 cap for a single incident is 203,000,000 SDR under the 2003 amendments (raised from the original 135 million SDR), corresponding at recent SDR rates to about USD 270 million. Above Fund 1992 sits the optional Supplementary Fund Protocol 2003, in force since 3 March 2005, which lifts the combined three-tier cap to 750,000,000 SDR (about USD 1 billion) for incidents in States that are Party to the Supplementary Protocol. The Fund operates from a Secretariat in London under a Director answerable to an Assembly of Member States. Major historical settlements include Erika 1999 off France, Prestige 2002 off Spain, and Hebei Spirit 2007 off the Republic of Korea, the last of which exceeded the then-applicable Fund cap and triggered Supplementary Fund payment. Parallel regimes include MARPOL Annex I prevention, the SOPEP regulation shipboard response duty, the PSSA Western European Waters protected-area governance, and the Bunkers Convention 2001 for non-tanker bunker pollution.

Contents

Background: layered compensation architecture

The international response to large oil pollution casualties is structured as a vertical waterfall of three compensation tiers. The first tier is the shipowner’s strict liability under CLC 1992, payable up to the SDR-per-ton sliding-scale limit and capped at 89,770,000 SDR for ships above 140,000 GT after the 2003 amendments. The second tier is the IOPC Fund 1992, financed by oil receivers in Member States, which pays compensation up to the combined three-tier-aggregate cap of 203,000,000 SDR. The third tier, available only where the casualty occurs in a State Party to the Supplementary Fund Protocol 2003, is the Supplementary Fund, which lifts the aggregate cap to 750,000,000 SDR.

The architecture is the institutional answer to the central problem exposed by the Torrey Canyon casualty of 18 March 1967: a single shipowner cannot absorb the cost of a major coastal pollution event, the cargo owner has historically refused liability, and traditional fault-based maritime tort rules fail to deliver timely or adequate compensation. The diplomatic conferences convened by the IMO (then IMCO) in 1969 and 1971 produced two complementary instruments. The CLC 1969 Convention placed strict liability on the shipowner. The Fund Convention 1971 established the supplementary fund financed by the cargo side of the trade, on the principle that the cost of pollution should be shared between ship and cargo rather than fall exclusively on either.

Fund 1992 inherits the 1971 Fund’s institutional design while raising limits, broadening the geographical scope to the EEZ, and aligning the eligibility and contribution rules with the modernised CLC 1992 framework. Together CLC 1992 and Fund 1992 are the world’s most comprehensive treaty regime for compensating coastal communities, fisheries cooperatives, tourism operators, public cleanup authorities, and the public purse for damage from a tanker oil spill. The regime is the second-most-cited example in international environmental law (after the ozone-protection regime) of a treaty that delivered measurable compensation outcomes against repeated real-world casualties.

The relationship between the three tiers can be expressed compactly:

L_{\text{total}} = L_{\text{CLC}}(\text{owner}) + L_{\text{Fund 92}} \quad \text{(up to 203 mn SDR)}

L_{\text{total + Supp}} = L_{\text{CLC}} + L_{\text{Fund 92}} + L_{\text{Supp Fund 2003}} \quad \text{(up to 750 mn SDR)}

The aggregate cap is per incident, not per claimant and not per State. Where a single casualty causes pollution damage in two or more Member States, the cap applies to the total damage across all States, and Fund payments are pro-rated if the aggregate admissible claims exceed the cap. The pro-rating rule is the operative discipline of the regime: claimants in a major casualty know in advance that recovery may be less than 100 cents on the dollar if the aggregate exceeds the cap, and the IOPC Funds publishes the payment percentage for each incident as a forward-looking signal to claimants.

1971 Fund Protocol to 1992 Fund Protocol succession

The original Fund Convention 1971 was opened for signature on 18 December 1971 and entered into force on 16 October 1978, initially with 15 Member States, paired with the 1969 Civil Liability Convention that had entered into force on 19 June 1975. It established the International Oil Pollution Compensation Fund 1971 (Fund 1971) with limits expressed in Poincaré gold francs and calibrated to 1971 vessel sizes and pollution costs. The combined 1969 CLC and 1971 Fund ceiling started at 30 million SDR per incident, then rose through successive amendments to 45 million SDR in 1979, 52.5 million SDR in 1986, and 60 million SDR in 1987. Three spills tested that regime before the 1992 reform: the Tanino in 1980, the Fund’s first large claim; the Haven off Genoa in 1991; and the Aegean Sea off La Coruña in 1992. Each pushed against the ceiling and showed that 60 million SDR was too low for a major casualty. The 1971 Fund ceased to be in force on 24 May 2002, when its membership fell below the 25 States required by Article 43.1, and it was formally dissolved on 31 December 2014 after the remaining Member States voted to wind it up.

The transition from 1971 Fund to 1992 Fund passed through four stages. The first was the 1976 Protocol to the 1971 Fund Convention, which replaced the Poincaré gold franc with the Special Drawing Right (SDR) of the IMF. The 1976 Protocol entered into force on 22 November 1994 and was a technical alignment with the parallel CLC 1976 Protocol.

The second was the failed 1984 Fund Protocol, which would have raised the limits substantively and broadened the scope but could not reach its tonnage threshold for entry into force after the United States declined to ratify in the wake of the Exxon Valdez spill of 24 March 1989 and the consequent enactment of the Oil Pollution Act 1990 (OPA 90). The 1984 Protocol mirrored the structure of the failed 1984 CLC Protocol and never took effect.

The third was the 1992 Protocol itself, adopted at a diplomatic conference on 27 November 1992 and entered into force on 30 May 1996. The 1992 Protocol raised the Fund cap from 60 million SDR (1971) to 135 million SDR (1992 original), broadened the geographical scope to the EEZ, broadened the definition of pollution damage to include reasonable measures of reinstatement, and aligned the contributor architecture with the modernised CLC 1992 framework.

The fourth was the 2000 amendments to the 1992 Fund Convention, adopted under the IMO tacit acceptance procedure on 18 October 2000 and entered into force on 1 November 2003. These amendments raised the Fund 1992 cap by approximately 50 percent, from 135 million SDR to 203 million SDR (combined with the CLC 1992 contribution). The 2003 limits remain in force as of 2026.

The successor architecture is therefore: 1971 Fund Convention (extinct) → 1976 Protocol (extinct as standalone) → 1984 Protocol (failed) → 1992 Protocol with 2003 amendments (in force) → 2003 Supplementary Protocol (optional add-on, in force).

1992 Fund Convention entry into force 1996

The 1992 Fund Convention required ratification by eight States, of which at least one had to have received during the preceding calendar year a quantity of contributing oil at or above 450 million tonnes. The threshold was reached in 1995, and the Convention entered into force on 30 May 1996, the same day as the parallel CLC 1992 Protocol. Twin entry into force was a deliberate design choice: the Fund pays only above the CLC tier, so the two instruments must be in force simultaneously in any given Member State for the regime to function.

As of 2026 the 1992 Fund Convention is in force for approximately 115 States. Notable Member States include all EU coastal States, the United Kingdom, Norway, Switzerland (as a contributor State despite being landlocked, by virtue of imports through Mediterranean ports), Russia, China, Japan, the Republic of Korea, Singapore, India, Australia, Canada, Mexico, Brazil, Argentina, Chile, South Africa, Kenya, Nigeria, the Gulf Cooperation Council members, and most ASEAN coastal States. Notable non-Member States include the United States (OPA 90 regime), several landlocked States, and a small number of coastal States that have not acceded.

The Convention applies to pollution damage in the territory (including the territorial sea) and the exclusive economic zone of a Member State. Damage on the high seas outside any EEZ is not covered. Damage in a non-Member State is not covered, even if the contributing oil that funded the regime ultimately came from a Member State terminal.

Purpose: when CLC is exhausted, fails, or absent

Fund 1992 pays compensation in four trigger scenarios, all defined by reference to the underlying CLC 1992 framework.

The first is CLC limit exhaustion. Where the pollution damage exceeds the shipowner’s CLC limit (89,770,000 SDR for a ship above 140,000 GT, or the proportional figure for a smaller ship), the Fund pays the layer between the CLC limit and the combined cap of 203,000,000 SDR. This is the most common trigger and covers the majority of major-casualty Fund interventions.

The second is CLC defence. Where the shipowner is exonerated under one of the closed defences in CLC Article III (act of war or exceptional natural phenomenon, deliberate third-party act, negligence of an authority responsible for navigational aids), the Fund pays for pollution damage that the shipowner is legally entitled not to pay. This trigger is rare in practice because the defences are narrowly construed, but it has operated in a small number of historical cases involving exceptional weather or third-party intentional acts.

The third is shipowner financial incapacity. Where the shipowner is unable to meet the CLC obligation in full and the insurance is insufficient (typically because the certificate amount is consumed by other claimants or because the insurer disputes coverage), the Fund pays the unmet portion of the CLC liability up to the Fund cap. This trigger is operationally important in shadow-fleet casualties where the CLC certificate is issued by a non-IG insurer of uncertain claims-paying ability.

The fourth is absence of CLC certificate. Where the polluting ship is not in fact insured under CLC 1992 (because the flag State failed to enforce the certificate requirement, because the certificate was issued in error, or because the casualty involves a non-tanker ship that is not subject to compulsory CLC insurance but a Member State elects to extend Fund coverage), the Fund may pay the entire admissible claim up to the cap. This trigger is treated cautiously and the Fund typically pursues subrogated recovery against the underlying shipowner where any assets are available.

The four triggers together implement the gap-filling principle: the Fund operates as the safety net behind the shipowner’s primary liability, and is not an alternative or first-payer regime. The shipowner is always the first defendant and the CLC limit is always the first layer of recovery.

Contributor architecture: oil-receiver levy in Member States

The Fund is financed exclusively by contributions from oil receivers in Member States. The contribution obligation is imposed on persons (natural or legal) that received in the territory of a Member State during the preceding calendar year more than 150,000 tonnes of contributing oil carried by sea. The contribution flows from the cargo side of the trade rather than the ship side, and shipowners do not directly contribute to the Fund (although the cost of CLC insurance premiums is functionally part of the shipowner’s contribution to the layered regime).

Contributing oil for Fund 1992 purposes is defined as crude oil and heavy fuel oil, in alignment with the persistent oil definition that triggers CLC 1992 liability. Light products such as gasoline, gas oil, kerosene, and naphtha are not contributing oil even when received in large quantities at the same terminal. The definition is operational rather than chemical: it ensures that the contributor base is congruent with the polluter-pays principle that the Fund implements.

“Received” carries a technical meaning. The oil must arrive at a port or terminal installation in a Member State after carriage by sea, so a domestic pipeline or road transfer does not count, and the same oil is not counted a second time when a refinery later moves it inland by truck. Crude landed off an arriving tanker counts; heavy fuel oil the refinery then trucks away does not. The rule keeps the levy tied to the seaborne import that creates the pollution risk, and it lets the Fund reconstruct receipts from port and customs records where a Member State has under-reported.

The 150,000 tonne threshold is per receiver per calendar year, aggregated across all terminals in the Member State. A multinational oil major receiving 4 million tonnes of crude through three Member State terminals in a year contributes on the full 4 million tonnes. A small regional importer receiving 100,000 tonnes is below the threshold and pays nothing. Member States are required to report to the IOPC Funds Secretariat the names and addresses of all qualifying receivers and the volumes received, on an annual basis. The reporting obligation is on the Member State as such; the Member State in turn requires the receivers to file declarations under domestic implementing law.

The receiver pays the contribution directly to the Fund in London, not via the Member State treasury. The Member State has no fiscal exposure to the Fund and does not appear in the financial statements as a contributor. The contribution is therefore a private-sector levy administered by an international organisation, not a State subsidy. This design is the operative answer to the question of whether IOPC contributions are Official Development Assistance under the OECD DAC framework: they are not, because they are private-sector payments rather than State expenditure.

The contributor base in a typical year covers approximately 80 to 100 receivers spread across the Member States, including the integrated oil majors (Shell, BP, TotalEnergies, ExxonMobil where its non-US affiliates qualify, Chevron, Eni, Equinor, Repsol), the State oil companies (Saudi Aramco subsidiaries, ADNOC, Kuwait Petroleum), the major Asian refiners (Sinopec, CNPC, SK Energy, S-Oil, Idemitsu, ENEOS), the major utilities and power generators receiving heavy fuel oil for power generation, and a long tail of smaller importers. The concentration of the contributor base means that a relatively small number of corporate entities effectively underwrites the second-tier pollution compensation regime for the world.

Per-tonne contribution rate and annual assessment

The Fund operates on a call-as-needed basis rather than a permanent capital model. There is no large permanent reserve fund. Instead, the Assembly approves an annual budget at its October session, comprising administrative expenses (Secretariat, claims office, Assembly meetings) and projected payments on outstanding incidents during the coming financial year. The budget is divided by the total tonnage of contributing oil received in the preceding calendar year across all Member States, yielding a per-tonne contribution rate in Sterling.

The contribution rate has typically run between GBP 0 per tonne in years with no major outstanding incidents and GBP 0.06 per tonne in years following major casualties. For a receiver importing 5 million tonnes a year, this implies an annual contribution between zero and GBP 300,000. The rate is set in Sterling because the IOPC Funds operates from London and maintains its accounts in Sterling, although the underlying compensation payments are made in the local currency of the affected coastal State.

The Fund maintains a General Fund for administrative expenses and small incidents, and Major Claim Funds opened on a per-incident basis for casualties exceeding a defined threshold. Each Major Claim Fund accumulates contributions sufficient to meet the projected liability for that incident over its lifetime, which can extend for ten to fifteen years from the casualty date as litigation, claims assessment, and pro-rata payments work through the system. The two-fund design isolates the financial impact of major casualties on individual contributors and allows the Assembly to taper contributions over time as claims are settled.

The annual assessment is invoiced to receivers in November and payable in March of the following year. Late payment carries interest at a rate set by the Assembly. Default by a receiver is rare; the contributor base is dominated by major investment-grade corporates and State oil companies for whom the Fund contribution is a routine operating cost. In the event of default, the Fund may pursue recovery through Member State courts under domestic implementing legislation.

Maximum compensation: 203 million SDR per incident

The combined CLC 1992 plus Fund 1992 cap for a single incident is 203,000,000 SDR under the 2003 amendments. This figure is inclusive of the shipowner’s CLC contribution, not in addition to it. If CLC 1992 contributes 89,770,000 SDR (the maximum for a ship above 140,000 GT), Fund 1992 will pay up to 113,230,000 SDR. If CLC contributes a smaller figure (because the ship is smaller, because the limitation fund is constituted at a sub-cap value, or because one of the Article III defences applies), Fund 1992 pays the larger residual layer up to the combined cap.

The original 1992 cap was 135,000,000 SDR, raised to 203,000,000 SDR by the 2000 amendments effective 1 November 2003. Incidents occurring before 1 November 2003 are subject to the 135 million SDR cap; incidents after that date are subject to the 203 million SDR cap. The Erika 1999 and Prestige 2002 cases were litigated under the 135 million SDR cap; the Hebei Spirit 2007 case was the first major casualty under the 203 million SDR cap.

At the SDR rate of approximately USD 1.33 per SDR prevailing in early 2026, the 203,000,000 SDR cap is equivalent to approximately USD 270 million. The figure is converted to local currency at the IMF SDR daily rate on the date the limitation fund or Fund payment is constituted. The conversion date is therefore typically several months after the casualty, and the actual local-currency value of the cap can shift by several percent between casualty and payment depending on FX movements.

The cap is per incident and not per claimant. Where multiple claimants in one or more Member States submit admissible claims aggregating to more than 203 million SDR, the Fund applies a payment percentage: each admissible claim is paid at the same fraction of its assessed value, and the Fund publishes the percentage in advance to allow claimants to plan accordingly. The percentage $p$ for a given incident is the available compensation divided by the aggregate of admissible claims, $p = \min\!\left(1, \tfrac{L_{\text{total}}}{\sum_i C_i}\right)$ , where $L_{\text{total}}$ is the applicable ceiling (203 million SDR, or 750 million SDR in a Supplementary Fund State) and $C_i$ is the assessed value of claim $i$ . If the aggregate falls within the ceiling, $p = 1$ and every claimant is paid in full. Erika and Prestige both ran at payment percentages well below 100 percent for many years before the final reckoning; Hebei Spirit eventually exceeded the 1992 Fund cap and engaged the Supplementary Fund.

Supplementary Fund 2003: third tier to 750 million SDR

The Supplementary Fund Protocol 2003 is an optional third tier added by a 2003 Protocol to the 1992 Fund Convention. It was adopted at a diplomatic conference on 16 May 2003 and entered into force on 3 March 2005. Membership is voluntary for States that are already Party to the 1992 Fund Convention; States may elect to ratify the Supplementary Protocol on top of their 1992 Fund membership, or remain in the 1992 Fund only.

The Supplementary Fund operates above the 1992 Fund layer. Where the combined CLC 1992 plus Fund 1992 cap of 203,000,000 SDR is reached, the Supplementary Fund pays the layer between 203 million SDR and 750,000,000 SDR. The Supplementary Fund cap is therefore an additional layer of approximately 547 million SDR above the 1992 Fund. The total combined three-tier cap is 750,000,000 SDR, equivalent at recent SDR rates to approximately USD 1 billion.

The Supplementary Fund is financed by contributions from oil receivers in Supplementary Fund Member States only. The contributor base is therefore narrower than the 1992 Fund base. Contributions are levied on the same basis (>150,000 tonnes of contributing oil received in a calendar year), reported to the same Secretariat, and managed through the same claims office. The Supplementary Fund has its own General Fund and Major Claim Funds in parallel to the 1992 Fund.

The Supplementary Fund Protocol adds one contribution rule the 1992 Fund does not have: a minimum aggregate receipt of 1,000,000 tonnes of contributing oil per Member State per year. Where the actual aggregate received in a Supplementary Fund State falls below 1 million tonnes, the State itself assumes the obligation for the shortfall, paying as if the difference between actual receipts and 1 million tonnes had been received by a liable person. The floor stops a small State from joining the expanded 750 million SDR tier while owing nothing into it because no single receiver crosses the 150,000 tonne threshold. It is a structural answer to the free-rider problem the wider ceiling would otherwise create.

As of 2026 approximately 33 States are Party to the Supplementary Fund Protocol, including France, Germany, Greece, Ireland, Italy, Japan, Republic of Korea, Lithuania, Netherlands, Norway, Portugal, Spain, Sweden, Türkiye, the United Kingdom, and a number of others. Notable 1992 Fund States that have not ratified the Supplementary Protocol include China, Russia, India, Singapore, and most ASEAN coastal States. The Supplementary Fund therefore provides 750 million SDR cover for an Erika-class casualty in EU waters but only 203 million SDR cover for an equivalent casualty in Strait of Malacca or South China Sea waters.

The Supplementary Fund has been engaged once in operative practice: the Hebei Spirit case, where Korean admissible claims aggregated above the 1992 Fund cap and the Supplementary Fund made up the difference.

STOPIA and TOPIA: voluntary industry supplements

The CLC 1992 limit for a small tanker is low. A ship of 5,000 GT or less faces a floor of just 4,510,000 SDR, the minimum CLC limit for any vessel however small. That means the Fund 1992 absorbs most of the combined ceiling whenever a small tanker spills, and the cost lands on oil receivers (cargo interests) rather than the ship side. An IOPC Funds statistical review of claims paid between 1978 and 2003 found that, over the long run, the split between shipowners and oil receivers had been roughly equal, but small-tanker incidents pushed the burden onto cargo. To correct the imbalance the International Group of P&I Clubs put two voluntary agreements in place, both with effect from 20 February 2006 and both amended in 2017.

STOPIA 2006, the Small Tanker Oil Pollution Indemnification Agreement, covers tankers of 29,548 GT or less entered in an International Group club and reinsured through the Group pool. Under it, the participating shipowner agrees to indemnify the 1992 Fund for compensation the Fund pays above the ship’s CLC limit, up to a combined CLC plus STOPIA figure of 20,000,000 SDR. In effect STOPIA lifts the small-tanker first tier to 20 million SDR and cuts the Fund’s net exposure on small-tanker incidents to the layer above that. A predecessor agreement of the same name had taken effect on 3 March 2005, tied to the entry into force of the Supplementary Fund Protocol, but it reached only States that were also party to the Supplementary Fund; STOPIA 2006 extended the mechanism to all 1992 Fund States.

TOPIA 2006, the Tanker Oil Pollution Indemnification Agreement, covers all International Group tankers regardless of size, in States party to the Supplementary Fund Protocol. Under TOPIA the shipowner indemnifies the Supplementary Fund for 50 percent of whatever the Supplementary Fund pays in compensation. That rebalances the ship-versus-cargo split for third-tier claims, where the 1992 Fund cap has already been passed.

Neither agreement is a treaty and neither Fund is a party, yet both are drafted so the Funds hold legally enforceable rights to indemnification and can sue an owner directly for the amounts due. Both carry identical review-and-adjustment clauses, so the IOPC Funds can recalibrate the ship-cargo split prospectively if the long-run cost balance drifts again. The agreements do not change a single figure available to a victim. They change who, between the ship side and the cargo side, ultimately carries the bill. A tanker not entered in an International Group club is outside STOPIA and TOPIA, and on such a casualty the Fund bears its full net exposure with no indemnity backstop.

The Special Drawing Right as the unit of account

Every ceiling in the 1992 Fund Convention is denominated in the IMF Special Drawing Right (SDR), not in any national currency. The choice was deliberate. An SDR-denominated cap does not erode against a single depreciating currency, and it spares the Convention an amendment fight every time one currency falls. The SDR is not money in circulation; it is a unit of account whose value the IMF fixes daily from a weighted currency basket. As of mid-2026 that basket holds the US dollar, the euro, the Chinese renminbi, the Japanese yen, and the pound sterling. At roughly USD 1.33 to USD 1.35 per SDR, the 203 million SDR cap sits near USD 270 to USD 274 million and the 750 million SDR Supplementary Fund cap near USD 1 billion. Both USD figures move every day.

For a given incident the SDR-to-local-currency rate is the rate on the date the shipowner constitutes the limitation fund in the CLC proceedings, or another date the relevant court fixes. Different courts in different incidents have used slightly different reference dates, which is why published SDR equivalents for the same casualty sometimes differ by a few percent across reports. A practitioner pricing a claim should pull the IMF rate for the date the limitation court actually fixed, not a generic current rate, and should do the same when converting a per-tonne contribution levy set in SDR into a domestic-currency cost.

IOPC Funds Secretariat in London

The Fund is administered by a Secretariat based in London at 4 Albert Embankment, sharing the building with the IMO headquarters. The Secretariat employs approximately 30 staff in 2026, comprising a legal department, a claims department, a finance department, an external relations department, and an internal administration department. The Secretariat is the operational arm of the Fund and handles day-to-day claims processing, contribution invoicing, contributor reporting, communications with Member States and claimants, preparation of Assembly and Executive Committee documentation, and representation of the Fund in litigation.

The Secretariat is not part of the IMO. The IOPC Funds is a separate international organisation with its own legal personality, established by the 1992 Fund Convention and headquartered alongside but institutionally distinct from the IMO. The two organisations cooperate closely on technical questions, particularly the persistent/non-persistent boundary, the geographical scope of pollution coverage, and the relationship between CLC, the Fund, and the Bunkers Convention.

The Secretariat is funded from the General Fund of the IOPC Funds. Administrative expenses run at approximately GBP 5 to 7 million per year in a normal year, recovered through the per-tonne contribution rate on contributing oil receivers. The Secretariat publishes annual financial statements audited by an external auditor appointed by the Assembly.

Director and Assembly governance

The Fund is governed by an Assembly of all Member States, meeting in ordinary session in October each year and in extraordinary session as required. The Assembly is the supreme decision-making organ. It approves the annual budget, sets the per-tonne contribution rate, elects the Director, approves Major Claim Fund openings, sets payment percentages on individual incidents, and adopts amendments to the internal rules. Each Member State has one vote, and decisions on substantive matters require a two-thirds majority of Member States present and voting.

Between Assembly sessions the Fund is run by an Executive Committee of fifteen Member States elected by the Assembly. The Executive Committee meets as required, typically two to four times per year, and exercises delegated authority on claims approvals, payment percentage adjustments, and litigation strategy. The 1992 Fund and the Supplementary Fund each have separate Assembly and Executive Committee meetings, although they share the same Director and Secretariat.

The Director is the chief executive officer of the IOPC Funds, elected by the Assembly for a term of four years renewable. The Director represents the Fund in legal proceedings, signs binding instruments on behalf of the Fund, manages the Secretariat, and reports to the Assembly. Recent Directors have been senior maritime lawyers or former government officials with experience in the oil pollution liability field. The Director is supported by a Deputy Director with similar qualifications.

The governance structure is deliberately lean and operational. Unlike many UN-related international organisations, the IOPC Funds has no specialised committees, no permanent technical sub-bodies, and no advisory panels. Substantive technical questions are referred to the Assembly or the Executive Committee directly, supported by Secretariat papers. This structure reflects the operational rather than political character of the Fund: it pays compensation claims, and the institutional machinery is calibrated to that purpose.

Per-incident workflow: claims office and assessment

Following a casualty, the Director opens an Incident File at the Secretariat and despatches a Claims Manager to the affected coastal State. The Claims Manager establishes a local claims office, typically in cooperation with the International Tanker Owners Pollution Federation (ITOPF), the technical advisory body funded by tanker owners, and with the relevant P&I Club insuring the shipowner. The local claims office accepts and reviews claims from affected parties, requests supporting documentation, conducts site visits, and prepares assessment reports for the Director.

The assessment process follows a published Claims Manual that specifies the categories of admissible damage, the documentary requirements for each category, the methodology for valuation, and the timeline for processing. The Claims Manual is amended periodically by the Assembly to reflect lessons learned from major casualties. The Manual is the operational backbone of the Fund’s claims-handling function and is the reference point for any dispute over the admissibility or quantum of a claim.

For each admitted claim, the Fund offers a payment at the current payment percentage. If the claimant accepts, the payment is made in full and final settlement of that claim. If the claimant disputes the admissibility, the quantum, or the payment percentage, the claimant may bring proceedings in the Member State court of competent jurisdiction. The Fund is a party to the proceedings and may also be sued directly under the direct action clause analogous to the CLC 1992 direct-action rule. Court judgments against the Fund are enforceable in all Member States by virtue of the Convention’s recognition rule.

The workflow operates on two parallel tracks: an interim payment track that delivers partial payments during the assessment phase, typically at a conservatively low payment percentage (40 to 60 percent) to ensure that even worst-case aggregate claims will not exhaust the cap; and a final payment track that closes out the incident with top-up payments once the final aggregate is known and the final payment percentage is set. The two-track design balances the urgency of compensation with the need to avoid over-payment in early years before the full damage is known.

Pro-rata payments and the priority question

Article 4(5) of the 1992 Fund Convention lets the Fund pay on a pro-rata basis when the aggregate of admissible claims exceeds the available compensation. The Convention sets no formal order of priority between claimants, so a small fishing-boat owner and a coastal government do not, on the face of the text, rank differently. In practice the Fund manages the timing rather than the rank. It pays interim amounts to private claimants early, once it is confident those claims sit well below any pro-rata threshold, and holds back full payment on large government claims until the total pool is better defined. That produces a visible asymmetry: a fishing claimant may be paid in full within 18 months, while a government’s nine-figure cleanup claim is settled years later at, say, 73 percent of its admitted value. The Prestige illustrated the pattern, the 135 million SDR ceiling reached, the pro-rata adjustment applied, and the claims determination dragging on while French court proceedings kept reshaping the total pool. In Supplementary Fund States the practical pro-rata risk is far lower, because only a casualty larger than anything handled to date would push aggregate admissible claims toward 750 million SDR.

The OPRC Convention and preparedness

The 1992 CLC and 1992 Fund Convention handle liability and compensation after a spill. The complementary instrument on preparedness sits beside them: the International Convention on Oil Pollution Preparedness, Response and Co-operation 1990 (OPRC 1990), administered separately through the IMO. OPRC 1990 requires States to maintain national oil-spill contingency plans, to hold response capability in readiness, and to cooperate on transboundary response. The OPRC 1990 and its HNS Protocol feed back into the Fund regime at the reimbursement stage. When a State deploys its national response under OPRC, the costs it runs up (response vessels, dispersants, shoreline equipment, labor) can be claimed from the 1992 Fund as preventive measures or cleanup costs, provided the measures were reasonable. A State that invests in standing response infrastructure recovers the deployment cost through the Fund if a significant incident ever calls it out.

Victim categories: clean-up, property, economic loss, environmental

The Fund recognises four broad categories of admissible damage, each governed by specific rules in the Claims Manual.

Clean-up costs include the costs of removing oil from the sea, from the shoreline, and from affected fauna; the costs of disposing of oil waste; the costs of restoring or replacing equipment damaged in the cleanup; and the salaries, allowances, and overheads of personnel deployed on the cleanup. These claims are typically the largest category in absolute terms and are the first to crystallise after a casualty. The Fund accepts claims from public authorities, contractors engaged by public authorities, and private parties (e.g. fisheries cooperatives) that undertook reasonable cleanup measures.

Property damage includes physical damage to fishing gear, fish farms, oyster beds, recreational craft, marina infrastructure, beach equipment, and shoreline structures contaminated by oil. The Fund accepts claims for repair, replacement, or compensation at fair market value of the damaged property.

Economic loss includes consequential financial loss flowing from the pollution event. Two sub-categories are recognised. Pure economic loss to fisheries and tourism is admissible where the claimant can show a direct causal link between the pollution and the loss, through criteria such as proximity to the polluted area, dependency on resources affected by the pollution, and inability to mitigate the loss through alternative business activities. Loss of profit by businesses directly using the affected resource (commercial fishing operations, fish processors, hotel and restaurant operations on affected coastlines, marinas, scuba diving operators) is treated under detailed Manual rules. Pure economic loss to remote parties (e.g. urban hotels far from the affected coast that lose bookings due to general national press coverage) is generally not admissible because the causal connection is too remote.

Environmental damage includes the costs of reasonable measures of reinstatement of the impaired environment actually undertaken or to be undertaken. The Fund recognises restoration of habitat, replanting of mangroves, restocking of fish populations, and rehabilitation of oiled fauna. The Fund does not pay damages for pure environmental impairment in the abstract (the loss of biodiversity as such, or theoretical damage to ecosystem services) where no reinstatement measures have been or will be taken. This rule is the operational answer to the broader question of ecological prejudice as a head of damages: the Fund pays for measurable, undertaken restoration; it does not pay for theoretical impairment.

Claim eligibility and the Sapphire test

The Fund’s admissibility test for claims has crystallised through the operative practice of the Assembly and Executive Committee around what is informally known as the Sapphire test, after the 1971 incident of the Liberian tanker Sapphire that gave rise to the first comprehensive Fund discussion of admissibility. The Sapphire test has three operative limbs.

The first limb is causal connection. The claimant must establish that the loss was caused by the pollution event, in the ordinary sense of factual causation (the loss would not have occurred but for the pollution). This is the same causation test as in domestic tort law and is rarely the decisive issue in major casualties.

The second limb is proximity or not-too-remote. The loss must not be too distant from the pollution event in space, time, or causal sequence. A fishing cooperative in the affected coastal area is sufficiently proximate. A souvenir shop in an inland city that suffers reduced footfall because tourists avoid the country generally is too remote. The proximity test is fact-specific and is the locus of most disputed admissibility decisions.

The third limb is reasonable mitigation. The claimant must have taken reasonable steps to mitigate the loss. A fisher whose grounds were polluted is expected to consider alternative grounds. A hotel facing low occupancy is expected to consider marketing initiatives, alternative customer segments, and operational cost-reduction. The Fund does not require perfection in mitigation but does require reasonable effort, and unmitigated losses are disallowed in proportion to the reasonable mitigation that was foregone.

The Sapphire test has been applied across all Fund-engaged casualties and has been accepted by the courts of Member States as the operative admissibility framework. The test is not in the Convention text itself; it is the internal interpretive standard of the Fund’s organs, made publicly available through the Claims Manual and the Assembly minutes. The standard has the practical force of a common-law precedent system within the Fund.

Claimant categories and the direct-action route

In practice the people who file with the Fund fall into five groups, and the Claims Manual treats each differently. Government authorities, national, regional, or local, claim for emergency response, deployment of cleanup vessels and aircraft, shoreline labor and equipment, oily-waste disposal, and preventive measures taken before oil reaches the coast. Government items are usually the largest single amounts in any incident, and they are reimbursable only where the measures were reasonable and the costs prudent. “Gold-plating”, running unnecessarily expensive technology where a cheaper method would have worked, gets the claim trimmed.

Commercial fishing operations claim for lost earnings during fishing bans, the cost of cleaning contaminated gear, condemned catch, and damage to boats. Because each registered vessel is a separate claimant, fishing claims in an incident like Hebei Spirit run into the tens of thousands. Aquaculture operators, fish farms and shellfish growers, claim for stock that died from contamination, cleanup, and lost market from food-safety closures. Per-claimant amounts here are often high because the stock investment is concentrated and a loss can be total. Tourism businesses claim for lost bookings and revenue, and they face the toughest admissibility scrutiny, since the causal line from a spill at sea to a coastal hotel’s reduced bookings is contestable. The Fund applies a two-part test: a geographic connection to the affected area, plus accounting evidence of revenue loss against prior years. Property owners claim for damage to fixed property such as quay structures, seawater intakes, and moored boats.

The direct-action route sits beside the Fund and interacts with it. Under Article 7(8) of the 1992 CLC a claimant can sue the shipowner’s CLC insurer, the P&I club, directly, without first pursuing the shipowner. That right matters most when the owner is insolvent or has vanished: the victim still has a solvent defendant in the courts of any Member State. The Fund then layers on top. In Hebei Spirit the Skuld P&I Club paid claimants directly under the CLC, and the 1992 Fund reimbursed Skuld once total payments crossed the CLC ceiling, subrogating into the position of the claimants it had compensated.

Major payouts: Erika 1999, Prestige 2002, Hebei Spirit 2007

Erika 1999

The Maltese-flag tanker Erika broke in two off the Bay of Biscay on 12 December 1999 and discharged approximately 20,000 tonnes of heavy fuel oil onto 400 km of French Atlantic coast. Total assessed damage was over EUR 1 billion including environmental reinstatement, fisheries losses, tourism losses, and cleanup costs. The CLC 1992 limit for the 37,283 GT Erika was about EUR 13 million under the pre-2003 limits then in force. The combined CLC plus Fund 1992 ceiling then in force was 135 million SDR, equivalent to about EUR 184 million, but that figure is the ceiling, not the sum disbursed: the Fund’s actual payments against admissible claims came to about EUR 129.7 million, paid on top of the CLC share. The shortfall against the EUR 1 billion of damage was the political catalyst for the 2003 Supplementary Fund Protocol and for the EU Erika I, II, and III packages of regional safety legislation.

The French criminal proceedings against the cargo owner Total were litigated separately under French environmental law. The French Court of Cassation in 2012 confirmed the recognition of ecological prejudice as a head of recoverable damage in French law, supplementing the Fund’s narrower environmental category. The case is the leading authority for the limits of the Fund’s environmental damage rule and for the interaction between the international compensation regime and stronger national environmental tort regimes.

Prestige 2002

The Bahamas-flag single-hull tanker Prestige broke up and sank approximately 130 nautical miles west of Galicia on 19 November 2002 and discharged approximately 63,000 tonnes of heavy fuel oil onto Spanish, Portuguese, and French coasts. Total assessed damage exceeded EUR 1 billion. The 81,564 GT Prestige had a CLC limit of about EUR 22 million under the pre-2003 limits, and Fund 1992 paid up to its 135 million SDR cap. The combined CLC plus Fund 1992 payment was approximately EUR 171 million.

The Spanish Supreme Court in 2016 confirmed the master’s criminal liability for environmental offences and assessed civil damages of over EUR 1.5 billion against the master, the shipowner, and the P&I Club. The case is the leading authority for the operation of the direct action clause against P&I Clubs under Article VII(8) of CLC 1992. The Spanish recovery against the P&I Club exceeded the Club’s underlying reinsurance limit and triggered IG pooling arrangements among the thirteen mutuals. The Prestige is the largest single P&I claim in the IG pool’s history.

Hebei Spirit 2007

The Hong Kong-flag VLCC Hebei Spirit was struck while at anchor by a drifting crane barge under tow off Daesan, Republic of Korea, on 7 December 2007, discharging approximately 10,900 tonnes of crude oil. The Korean Supreme Court confirmed in 2009 that the registered shipowner of the Hebei Spirit was strictly liable under CLC 1992 even though the proximate cause was the negligence of the tow operator: the deliberate-third-party-act defence in CLC Article III(2)(b) was not satisfied because the tug crew had been negligent rather than acting with intent to cause damage.

Korean admissible claims aggregated to approximately KRW 422 billion (about EUR 280 million at then-prevailing rates), exceeding the 1992 Fund cap of 203 million SDR (about EUR 240 million at the time). The case engaged the Supplementary Fund for the first time in operative practice, with the Supplementary Fund paying the layer between the 1992 Fund cap and the final settlement total. The Korean government supplemented the international payments with a domestic special compensation scheme funded from the national treasury to ensure full recovery for affected claimants. The Hebei Spirit case validated the three-tier architecture under operational stress and is the canonical precedent for Supplementary Fund engagement.

2024-2025 outstanding incidents

Princess Empress 2023 Philippines

The Philippines-flag tanker MT Princess Empress sank in the Mindoro Strait on 28 February 2023 carrying approximately 800,000 litres (about 700 tonnes) of industrial fuel oil. The casualty caused pollution damage along the Mindoro and Palawan coastlines and engaged Fund 1992 because the Philippines is a Member State. As of 2026 the claims assessment is ongoing through the local claims office in Manila and the Fund has made interim payments to fisheries claimants and cleanup contractors. Final aggregate settlement is expected in 2027 or 2028.

X-Press Pearl 2021 Sri Lanka

The Singapore-flag container ship X-Press Pearl caught fire and sank off Colombo on 2 June 2021 with a cargo of containerised chemicals. The casualty caused severe shoreline pollution from plastic nurdles and chemical residue but fell outside the scope of CLC 1992 and Fund 1992 because the cargo was containerised chemicals rather than persistent oil and the ship was a container ship rather than a tanker. The Sri Lankan claim against the shipowner was litigated outside the IOPC framework, primarily under the Bunkers Convention 2001 for the bunker oil spill component and under domestic tort law for the chemical-cargo component. The case is the leading recent illustration of the limits of the persistent-oil-tanker scope of the IOPC regime and of the gaps in international coverage for non-tanker container-ship pollution events.

Iran-Iraq tanker traffic incidents

A series of tanker casualties in the Persian Gulf and the Strait of Hormuz in 2019, 2023, and 2024, some involving sanctions-affected shadow-fleet vessels, raised structural questions about Fund engagement where the polluting tanker is operating outside the IG P&I Club system and where the CLC certificate is issued by a non-IG insurer of uncertain claims-paying ability. The Fund has indicated through Assembly papers that it stands ready to engage in any casualty within a Member State EEZ, but that the Fund’s subrogated recovery against shadow-fleet shipowners may be impaired by the limited transparency of the underlying insurance arrangements. This is a structural risk to the polluter-pays architecture and is the subject of ongoing Assembly discussion.

Sanchi 2018 East China Sea

The Panama-flag suezmax tanker Sanchi collided with the bulk carrier CF Crystal in the East China Sea on 6 January 2018, caught fire, and sank on 14 January with the loss of all 32 crew. The Sanchi was carrying approximately 111,000 tonnes of natural gas condensate, a non-persistent ultra-light hydrocarbon. The cargo therefore fell outside the scope of CLC 1992 and Fund 1992, even though the damage to the marine environment was severe. The case illustrates the limit of the persistent/non-persistent boundary and has fed academic discussion of whether the regime should be extended to non-persistent oils carried at scale by VLCC-class condensate tankers.

Per-state contribution status

The contributor base in 2024 was dominated by the major oil-importing Member States. The largest contribution volumes (in tonnes of contributing oil received) were attributable to oil receivers in Japan, Republic of Korea, India, Italy, the Netherlands, Singapore, Germany, the United Kingdom, France, and Spain. Each of these jurisdictions hosts large coastal refining clusters or strategic crude oil import terminals. The receiver-level breakdown is published in the Fund’s annual report and in the contribution invoices issued by the Secretariat.

Japan is consistently the largest single contributor by tonnage, reflecting its large refining sector and its dependency on imported crude oil. Japanese receivers including ENEOS, Idemitsu, Cosmo Energy, and Sumitomo have collectively reported contributing oil volumes of approximately 200 million tonnes per year in recent years.

Republic of Korea is the second largest single contributor, reflecting the integrated refining cluster around Yeosu, Daesan, Onsan, and Ulsan. Korean receivers including SK Energy, GS Caltex, S-Oil, and Hyundai Oilbank report contributing oil volumes of approximately 150 million tonnes per year.

India has emerged as a major contributor since 2018, driven by the growth of the Reliance, IOCL, BPCL, HPCL, and Nayara refineries. India is a 1992 Fund Member State but is not Party to the Supplementary Fund Protocol, so its contributing oil receivers contribute to the 1992 Fund only.

Italy, the Netherlands, Germany, France, Spain, and the United Kingdom are major European contributors and all are Party to both the 1992 Fund and the Supplementary Fund. Contributing oil volumes range from 50 to 100 million tonnes per year per State.

Singapore is a major contributor by tonnage despite its small geographical size, reflecting its role as a regional refining and trading hub. Singapore is Party to the 1992 Fund but not the Supplementary Fund.

The United States is not a Member State of the 1992 Fund and contributes nothing. US oil receivers face no Fund obligation, and US-flag tankers operating outside US waters are not covered by Fund 1992 payments to US claimants. Oil pollution in US waters is governed by OPA 90 and the Oil Spill Liability Trust Fund, both administered by the US Coast Guard.

Relationship to Bunkers Convention 2001

The International Convention on Civil Liability for Bunker Oil Pollution Damage 2001 (the Bunkers Convention) is the parallel regime for non-tanker ships carrying persistent oil only as bunkers (the ship’s own fuel). It entered into force on 21 November 2008 and applies to bulk carriers, container ships, ferries, RoRos, general cargo vessels, and other non-tanker classes carrying typically several thousand tonnes of heavy fuel oil or marine gas oil as ship’s fuel.

The Bunkers Convention imposes strict liability on the registered owner, bareboat charterer, manager, and operator (a wider list of defendants than CLC 1992), with compulsory insurance evidenced by a Bunker Blue Card for ships above 1,000 GT. Liability is limited under the Convention on Limitation of Liability for Maritime Claims (LLMC) regime rather than the CLC sliding scale. The LLMC limits are typically lower per ton than the CLC limits but apply across all maritime claims rather than only pollution claims.

There is no equivalent of Fund 1992 under the Bunkers Convention. Bunker pollution from non-tanker ships is covered only by the shipowner’s primary LLMC liability, with no second-tier compensation regime for cases where the LLMC limit is exhausted, where the shipowner is exonerated, or where the shipowner is financially unable to pay. This gap is structurally significant: a major bunker spill from a 200,000 dwt VLCC-class bulk carrier or a 24,000 TEU ultra-large container ship can release 4,000 to 8,000 tonnes of heavy fuel oil, exceeding the cargo capacity of many small product tankers. The X-Press Pearl 2021 case is the leading recent illustration of the gap.

Proposals for a Supplementary Bunkers Fund modelled on Fund 1992 have been discussed at IMO Legal Committee since 2018 but have not progressed to a diplomatic conference as of 2026. The political obstacle is the question of who pays: bunker oil is consumed by the ship, not delivered as cargo to a receiver, so the receiver-levy model of Fund 1992 does not transpose cleanly. Alternative models including a bunker-supplier levy or a shipowner-levy have been canvassed but no consensus has emerged.

Relationship to the HNS Convention 2010

The HNS Convention 2010 (International Convention on Liability and Compensation for Damage in Connection with the Carriage of Hazardous and Noxious Substances by Sea) copies the CLC-plus-Fund structure for chemicals, LNG, LPG, and other hazardous and noxious cargoes. It sets a first tier of strict shipowner liability with compulsory insurance and a second-tier HNS Fund financed by receivers of HNS cargoes, the direct analogue of the oil-receiver levy under Fund 1992. The HNS Convention 2010 had not entered into force as of mid-2026, so the second-tier compensation gap it was drafted to close, for casualties like the X-Press Pearl that involve chemical cargoes rather than persistent oil, remains open. The 2010 Protocol fixed the receipt-accounting problems that kept the original 1996 HNS Convention from attracting ratifications, in particular by separating LNG accounting and by capping packaged-HNS contributions, but the tonnage and State thresholds still had not been met.

Relationship to salvage and general average

Oil-spill liability from a tanker casualty runs alongside two other regimes that allocate cost. Salvage operations under the 1989 Salvage Convention often aim at preventing a spill rather than only saving property. Where a salvor’s SCOPIC measures stop pollution that would otherwise have triggered the Fund, those costs can be reimbursed in part by the CLC insurer. The Fund itself does not pay salvors. It compensates pollution victims, and a salvage reward is not pollution damage.

General average arises between cargo interests and the shipowner when an extraordinary sacrifice or expenditure saves the common maritime adventure. If a tanker is saved by jettisoning cargo and that jettison causes a spill, the CLC and Fund handle the pollution damage while general average handles the cost-sharing of the extraordinary expenditure. The two regimes run concurrently, and the cross-claims between pollution liability and average contribution can become tangled in a major casualty with multiple cargo interests.

Limitation proceedings and the fund model

The 1992 CLC requires the shipowner to constitute a limitation fund in the courts of the State where the incident occurred, or where a competent court has jurisdiction, as the precondition for enjoying the CLC liability ceiling. In practice the P&I club constitutes that fund by lodging a letter of undertaking (LOU), which the court accepts as security in place of a cash deposit. Once the limitation fund is constituted, claimants must file their claims in those proceedings, and if the 1992 Fund is also liable it is joined as the second-tier payer.

Article 7 of the 1992 Fund Convention gives the Fund standing to intervene in limitation proceedings in any Contracting State. The Fund can contest the admissibility of an individual claim, dispute the quantum of a loss, and challenge the applicable CLC ceiling where the shipowner’s tonnage measurement is in question. In a multi-State casualty such as the Prestige, which fouled Spain, France, and traces of the United Kingdom, parallel limitation proceedings in different jurisdictions create coordination problems, above all over which court fixes the total claims pool that the pro-rata percentage is then calculated against.

OECD ODA-eligibility status

The OECD Development Assistance Committee (DAC) defines Official Development Assistance (ODA) as flows of official financing administered with the promotion of the economic development and welfare of developing countries as the main objective, and concessional in character. ODA is a State expenditure category: it counts public-sector outflows from donor governments to recipient governments or multilateral development organisations.

IOPC Fund contributions are not ODA-eligible for two structural reasons. First, contributions are paid by private-sector oil receivers, not by donor governments. The Fund is a private-sector levy administered by an international organisation, not a State subsidy. There is no donor government expenditure to score as ODA. Second, the recipient of Fund payments is the affected coastal State or its citizens, regardless of the State’s development status. Payments to high-income coastal States (Japan, Republic of Korea, France, Spain, the United Kingdom) are equally outside the ODA framework. The development-promotion motive that ODA scoring requires is absent: the Fund’s purpose is compensation, not development.

The ODA-eligibility question is occasionally raised by Member State foreign ministries seeking to score Fund payments to developing-country claimants as ODA. The OECD DAC Secretariat has consistently declined to recognise IOPC payments as ODA, on the dual grounds that the contributions are private-sector and the payment recipients are not necessarily developing countries. The position is settled and is referenced in the IOPC Funds’ own annual reports.

References

IOPC Funds, 1992 Fund Convention and Supplementary Fund Protocol legal framework.
IOPC Funds, 1992 Civil Liability Convention reference text and historical incident database.
IOPC Funds, Incident map and historical settlements (Erika, Prestige, Hebei Spirit, Princess Empress).
IOPC Funds, Secretariat governance, Director, Assembly, and Executive Committee.
IOPC Funds, Contributing oil and 150,000 tonne receiver threshold rules.
IOPC Funds, Claims handling, admissibility, and the Sapphire criteria.
IMO, International Fund for Compensation for Oil Pollution Damage (Fund Convention) overview.
IOPC Funds, STOPIA 2006 and TOPIA 2006 voluntary indemnification agreements between International Group P&I clubs and tanker owners.
IOPC Funds, Annual reports including 2024 contribution data and contributor breakdown by Member State.
IMO, Bunkers Convention 2001 overview and parallel regime for non-tanker bunker pollution.
OECD DAC, Official Development Assistance definition and coverage rules.