The purpose of this legislation is to update the Clean Air Act to recognize fuel used by ocean-going vessels as a type of renewable fuel. This change aims to expand the renewable fuel program, allowing for the generation of credits for using these fuels, which can help reduce greenhouse gas emissions from maritime transportation. Key provisions of the legislation include a specific amendment to the existing law that adds fuel for ocean-going vessels to the list of fuels eligible for renewable fuel credits. This amendment will take effect two calendar years after the law is enacted.