In Cour de cassation, Chambre civile 1, 13 May 2015, n° 13-17751, the French Cour de cassation (Supreme Court) considered an appeal from a Versailles Court of Appeal judgment in the long-running dispute between the Republic of the Congo and the Congolese company, Commissions Import Export SA (Commisimpex). The Supreme Court considered whether, under customary international law, diplomatic missions benefit from an autonomous form of immunity from execution, which can only be waived in an express and specific manner.