The Critical Undersea Infrastructure Resilience Initiative Act aims to bolster the security and resilience of critical undersea infrastructure vital to Taiwan, specifically addressing threats from the People's Republic of China's gray zone tactics. Congress finds that PRC actions, including suspected sabotage of undersea cables, pose a significant vulnerability to Taiwan's communication, military, economic, and social functions, with global economic implications. The bill defines critical undersea infrastructure to include both subsea energy and telecommunications networks, emphasizing their importance. To achieve its goals, the Act establishes the Taiwan Critical Undersea Infrastructure Initiative , led by the Secretary of State in coordination with other agencies. This initiative will prioritize advanced monitoring and detection capabilities to identify disruptions in real-time, alongside the development of rapid response protocols for damaged infrastructure. It also mandates enhancing maritime domain awareness around Taiwan through joint patrols and surveillance with regional partners, including Taiwan's Coast Guard, to detect and interdict suspicious activities. Furthermore, the initiative seeks to establish cooperative international frameworks for protecting undersea cable networks near Taiwan, involving joint drills, intelligence-sharing, and collaborative surveillance. It encourages and supports the physical hardening of Taiwan's critical undersea infrastructure through measures like reinforcing cables and improving burial depths. The bill also directs the President to work with international partners to counter PRC sabotage activities and raise global awareness of these risks through diplomatic efforts and information sharing. A significant provision of the Act is the authorization for the President to impose sanctions on foreign persons responsible for or facilitating sabotage against critical undersea infrastructure vital to Taiwan or U.S. allies. These sanctions include blocking property and denying visas or admission to the United States for individuals and entities involved in such acts. The President must report to Congress on any sanctions imposed and can waive them for national security interests under specific conditions. Finally, the bill mandates comprehensive interagency contingency planning for potential crises in the Taiwan Strait. It establishes a Cross-Strait Contingency Planning Group, chaired by the National Security Council, to conduct scenario-based planning exercises for various threats, identify vulnerabilities, and develop integrated diplomatic, military, economic, cyber, and homeland security responses. This group is required to submit classified reports to Congress annually, detailing preparedness assessments and recommendations to enhance readiness.