Annual contributions to the IOPCF are levied by the fund administration on oil importers in member states who have imported, by sea, more than 150,000 tonnes of oil in a previous calendar year. Three importers in the State are liable for contributions to the fund, the ESB, the Irish National Petroleum Corporation and Aughinish Aluminia. The size of the annual contributions vary according to the amount of oil eligible for levy and the number and size of claims settled in any one year. Claims arising out of a costly incident can push up the contribution required in any given year. The total contribution made by the Irish importers in 2002 was about €200,000. While it is not possible to estimate accurately the effects of the revised limits, it is not anticipated that the current contribution levels will be significantly affected.