1. Short title This Act may be cited as the Sustainable International Financial Institutions Act of 2023 . 2. Clean energy and climate justice at international financial institutions The International Financial Institutions Act ( 22 U.S.C. 262c et seq. ) is amended by adding at the end the following: XX Clean energy and climate justice 2001. Clean energy and climate justice (a) In general The United States Executive Directors at the international financial institutions specified in subsection (c) shall use the voice and vote of the United States in those institutions— (1) to advance the cause of reducing greenhouse gas emissions and transitioning the global economy to a clean energy economy, including by seeking to channel assistance toward countries and entities that are building clean and sustainable energy systems; (2) to oppose any policy reform, or investment, loan, or extension of financial or technical assistance to any country or entity, that is intended to create, or will have the effect of creating, new capacity for, or the expansion of, fossil fuel activity, including— (A) any such policy reform, investment, loan, or extension of assistance that would support the refurbishment or life extension of existing fossil fuel capacity; or (B) any such investment, loan, or extension of assistance to a country or entity that would necessitate, or is predicated upon, increased fossil fuel capacity outside of the country receiving the investment, loan, or extension of assistance or the country in which the entity operates, as applicable, without regard whether the activity falls within the portfolio of the international financial institution providing the investment, loan, or extension of assistance; and (3) to support the phasing out of funding for internal combustion engines for passenger vehicles and buses by 2025 in a way that is sustainable and sensitive to communities in need of mobility. (b) Reduction of contributions