Alinea 111 Hoge Raad 13 april 2012

"3. The acceptance therefore of the ius cogens nature of the prohibition of torture entails that a State allegedly violating it cannot invoke hierarchically lower rules (in this case, those on State immunity) to avoid the consequences of the illegality of its actions. In the circumstances of this case, Kuwait cannot validly hide behind the rules on State immunity to avoid proceedings for a serious claim of torture made before a foreign jurisdiction; and the courts of that jurisdiction (the United Kingdom) cannot accept a plea of immunity, or invoke it ex officio, to refuse an applicant adjudication of a torture case. Due to the interplay of the ius cogens rule on prohibition of torture and the rules on State immunity, the procedural bar of State immunity is automatically lifted, because those rules, as they conflict with a hierarchically higher rule, do not produce any legal effect. In the same vein, national law which is designed to give domestic effect to the international rules on State immunity cannot be invoked as creating a jurisdictional bar, but must be interpreted in accordance with and in the light of the imperative precepts of ius cogens."

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