Functional Immunity of the Marines on the Enrica Lexie: A Reply To Raffaella Nigro

This article is a short reply to Raffaella Nigro’s assessment of the Arbitral Tribunal award in the Enrica Lexie case. Professor Nigro analyzes the rule of functional immunity of State officials from foreign criminal jurisdiction and argues that it cannot be applied to the two marines, even supposing that military personnel are covered by such a rule. Professor Nigro bases this conclusion on the facts that the marines were stationed on a commercial vessel and were servicing the interests of the private shipowner. In reply, this author reaffirms the existence of a rule of customary international law on functional immunity and argues that military personnel assigned to commercial vessels are carrying out these duties in order to protect Italian interests and contribute to the defeat of piracy. Therefore, the marines on board the Enrica Lexie were (and still remain) under the protection of the rule on immunity from foreign criminal jurisdiction.