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Incoming: How International Investment Law Constrains Foreign Investment Screening


Domestic screening of foreign investment, often on national security grounds, has intensified in recent years. More countries are introducing such regimes, while others expand their scope or allow retrospective screening. These developments increase the potential for investor–State claims under international investment agreements, even sometimes regarding investments that are not yet established. Host States need to be aware of the potential for adverse screening decisions, the imposition of conditions, or due process shortcomings to conflict with investment obligations, such as fair and equitable treatment or most-favoured nation treatment. Although tools exist in some treaties to exclude or exempt investment screening, these may not prevent a successful investment claim. For example, listing a screening regime as a non-conforming measure may not cover all future amendments, and general and security exceptions are subject to considerable uncertainty. Host States need to ensure compliance with international investment law in creating and developing screening regimes.