Leading shipping industry organisations and environmental groups have submitted a proposal to International Maritime Organisation (IMO) calling for an explicit prohibition on the carriage of non-compliant marine fuels when the global 0.5% sulphur cap takes effect in 2020. World Shipping Council, International Chamber of Shipping, BIMCO, Clean Shipping Coalition, Cruise Lines International Association, Friends of the Earth U.S., International Parcel Tankers’ Association, INTERTANKO, Pacific Environment, and WWF Global Arctic Program are among organisations which called for carriage ban on non-compliant fuel. The IMO has agreed that from 1 January 2020 the maximum permitted sulphur content of marine fuel (outside Emission Control Areas) will reduce from 3.5% to 0.5%. Unless a ship is using an approved equivalent compliance method, there should be no reason for it to be carrying non-compliant fuels for combustion on board. Though the 2020 sulphur cap will provide substantial environmental and human health, it will significantly increase ships’ operating costs and will present major challenges to governments that must ensure consistent enforcement across the globe.