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The Coast Guard is proposing regulations to carry out the provisions of Annex VI of the MARPOL Protocol, which is focused on the prevention of air pollution from ships.  The Act to Prevent Pollution from Ships has already given direct effect to most provisions of Annex VI, and the Coast Guard and the Environmental Protection Agency have carried out some Annex VI provisions through previous rulemakings.  This proposed rule would fill gaps in the existing framework for carrying out the provisions of Annex VI.  Chapter 4 of Annex VI contains shipboard energy efficiency measures that include short-term measures reducing carbon emissions linked to climate change and supports Administration goals outlined in Executive Order 14008 titled Tackling the Climate Crisis at Home and Abroad. This proposed rule would apply to U.S.-flagged ships.  It would also apply to foreign-flagged ships operating either in U.S. navigable waters or in the U.S. Exclusive Economic Zone.