Regulations for Emissions from Vehicles and Engines

EPA activity in the International Maritime Organization

At its 65th session in May 2013, MEPC approved a draft amendment to MAPROL Annex VI that would delay the international Tier III NOx limits from 2016 to 2021. The United States joined with Canada, Denmark, Germany, and Japan on a paper that provided information challenging the reasoning behind that decision and recommending that the Committee reconsider its decision and retain the original implementation date of January 2016. At its 66th session in April 2014, the Committee agreed to retain the 2016 effective date for the North American and U.S. Caribbean Sea ECAs. For future NOx ECAs, the standards will apply to engines installed on ships constructed on or after the date of adoption of such an emission control area, or a later date as determined by the country applying for the NOx ECA designation.

At MEPC 62 in July 2011, the IMO amended MARPOL Annex VI to include energy efficiency standards for new ships through the designation of an Energy Efficiency Design Index.

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