The FuelEU Maritime regulation seeks to steer the EU maritime sector towards decarbonisation. The proposal sets up a fuel standard for ships and introduces a requirement for the most polluting ship types to use onshore electricity when at berth. It puts the responsibility for compliance on the shipping company. The legislative outcome of this proposal will be closely linked to the simultaneously proposed rules on including the maritime sector in the EU emissions trading system, as well as those on alternative fuels infrastructure, energy taxation and renewable energy. Moreover, some of the proposed rules do not concern EU shipping only but have wider implications for international maritime shipping, which is regulated by the International Maritime Organization (IMO).