By Daniel HayesThe United States Department of the Treasury has issued a comprehensive Notice of Proposed Rulemaking to implement the Comprehensive Outbound Investment National Security Act, tightening federal oversight of American capital flowing into sensitive foreign technologies. Released on October 22, 2026, the proposed rule expands restrictions across semiconductors, quantum computing, super intelligence, hypersonics, and biotechnology.
Designed to enhance the Treasury Department’s Outbound Investment Security Program, the proposed regulations establish binding compliance obligations for United States persons and their controlled foreign entities. Treasury officials emphasized that preventing American venture capital, private equity, and corporate joint ventures from accelerating the military, intelligence, and surveillance capabilities of foreign adversaries is an urgent national security priority.
The rulemaking outlines clear technical thresholds, mandatory notification procedures, definitions of covered foreign persons, and enforcement penalties for prohibited cross-border investments. More reporting on financial regulation and national security legislation can be found in the Politics section.
Expanded Technology Categories Under Federal Scrutiny
Under the October 22 Notice of Proposed Rulemaking, the Treasury Department detailed technical specifications for six primary technology domains subject to covered transaction rules. Those categories encompass semiconductor technology and microelectronics, quantum information technologies, super intelligence systems, hypersonic systems, high-performance computing and supercomputing, and advanced biotechnology.
Compared with earlier executive branch screening frameworks, the statutory implementation broadens federal oversight to include hypersonic delivery systems, supercomputing infrastructure, and dual-use biotechnology alongside advanced microelectronics and artificial intelligence. The proposed rule defines specific performance and compute parameters so U.S. investors, fund managers, and legal compliance teams can determine whether a foreign target company develops or produces covered national security products.
Certain passive or routine financial activities remain carved out as excepted transactions, provided they do not confer board governance rights, technical access, or operational influence over a covered foreign person. However, U.S. parent companies remain legally responsible for monitoring and preventing prohibited transactions executed by their controlled foreign subsidiaries worldwide.
Due Diligence Standards, Allied Cooperation, and Penalties
A critical component of the Treasury proposal is the knowledge standard applied to American investors evaluating foreign deals. Before completing a cross-border transaction, a U.S. person is expected to conduct a reasonable and diligent inquiry to verify whether the foreign counterparty is engaged in restricted semiconductor, quantum, supercomputing, hypersonic, or biotechnology activities.
For transactions that fall within mandatory reporting tiers rather than outright prohibitions, investors must submit detailed notifications to the Treasury Department disclosing ownership structures, capital commitments, and technology profiles. The proposed rule also establishes a formal mechanism allowing U.S. firms to submit confidential transaction details and request non-binding regulatory feedback prior to closing a deal.
Tighter outbound capital rules complement bilateral technology agreements with trusted allies, including the U.S.-Japan Technology Prosperity Deal signed in October 2026 to align super intelligence standards, advance a $1 billion Department of Energy strategic partnership, and update research intellectual property protections. Violations of the Outbound Investment Security Program—including failing to file required notifications, omitting material facts, or completing a prohibited national security transaction—carry substantial civil and criminal penalties alongside mandatory federal divestment orders. Public comments submitted during the notice period will help shape the final compliance rules.
