CBW Fentanyl Act

This bill expands existing U.S. sanctions authority to target foreign countries whose chemical or biological programs cause harm to other nations. It requires the President to investigate and sanction foreign officials or entities involved in such harmful activities, with specific focus on programs producing benzylfentanyl, 4-anilinopiperidine, or norfentanyl precursors. The law establishes a three-stage sanctions process: initial restrictions on scientific cooperation and certain exports, intermediate measures that may cut off foreign assistance and additional export controls, and final sanctions that prohibit financial transactions involving the affected country. Sanctions can be lifted if the foreign government addresses the harm, provides information, and takes steps to prevent future incidents, with a five-year limit on presidential waiver authority.