Directs the U.S. Treasury to push multilateral development banks (MDBs) to permit and support financing and technical assistance for nuclear energy that meets U.S. or allied quality standards, and to create dedicated trust funds at those institutions to support nuclear energy projects and related capacity-building. The bill requires Treasury to instruct U.S. Governors at specified MDBs to pursue these changes, sets rules for how trust fund money may be used or returned, and requires annual reporting on progress for a limited term (trust fund and advocacy authorities include 10-year sunsets; reporting obligation runs seven years).