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Dual nationality jurisdiction is a critical component of international arbitration. This doctrine currently sparks many debates among legal scholars and arbitrators. Investors must understand the mechanism known as the “predominant test,” or the “dominant and effective test.” Therefore, this article shows how that test applies to the International Centre for Settlement of Investment Disputes (ICSID). Below, we explain the legal basis for dual nationality jurisdiction and how tribunals apply it in international arbitration.
Jurisdiction and the Predominant Test Defined
The ICSID Convention codifies the predominant test. Under that rule, jurisdiction depends on nationality. A dispute involving nationals of two different countries qualifies only when each party is “predominantly of one nationality.” In other words, each party must tie a clear majority of its national connections to one country. Therefore, a dual citizen counts as a national of only one state for jurisdiction purposes. Indeed, a second passport does not change that analysis.
Reasons Behind the Dual Nationality Test
This rule exists for a practical reason. It ensures that the same laws and regulations bind both parties when they resolve their disputes through arbitration. Different countries maintain their own rules governing investments. As a result, conflicts would arise easily. Parties would struggle if each side answered to a different set of rules. Requiring parties to originate predominantly from one country therefore keeps the applicable law uniform. Consequently, jurisdiction sits at the center of this analysis.
Conclusion
Understanding the predominant test matters for anyone entering international arbitration through ICSID or a similar institution. The rule requires both parties to originate predominantly from one country. That requirement promotes uniformity and fairness in each case. Moreover, it prevents conflicts that differences between national laws might otherwise create. In addition, a clear jurisdiction rule gives investors a level playing field in cross border disputes. Finally, it protects them from ambiguous outcomes that competing regulations could produce where parties hold ties through dual nationality.
If you hold dual citizenship and face an investment dispute with a host state, nationality may decide whether a tribunal hears your claim. Contact our team to discuss how the predominant test applies to your circumstances.
