The European Commission is introducing regulations to monitor, report, and verify CO2 emissions from ships visiting EU ports as part of the EU's efforts to reduce greenhouse gas emissions. Starting in 2018, ship owners must monitor and annually report the CO2 emissions and efficiency of ships over 5000 GT that visit EU ports. This data will be verified by third parties and published by the European Commission to integrate maritime emissions into the EU's climate policies. Shipping companies must prepare monitoring plans for applicable ships by August 2017 and begin collecting voyage data from January 2018.