Arbitration analysis: In a decision dated 23 May 2023, the Paris Court of Appeal (the Court) dismissed an application to set aside an ICC award rendered in favour of the Libyan National Oil Corporation (NOC) brought by Trasta Energy Ltd (Trasta) on the grounds that: (i) the arbitral tribunal was wrongfully constituted, (ii) the principles of due process and equality of arm were violated, and (iii) the recognition or enforcement of the award would be contrary to international public policy. The main takeaway of this decision stems from the Court’s reasoning regarding the independence of the presiding arbitrator whereas Trasta argued that the latter had failed to disclose that a member of her barristers’ chambers was representing Libya in a parallel court proceeding in a case that was heavily publicised. In dismissing the application, the Court applied an in-depth analysis of the criteria to take into consideration when assessing the admissibility and the merits of the duty to disclose. On the admissibility of the claim, in accordance with its recent case law, the Court held that the arbitrator’s duty to disclose is ongoing throughout the proceedings, whereas the parties’ obligation to research the independence of the arbitrator ends once the tribunal is constituted. As such, even though the information was notorious and accessible, it was the arbitrator’s duty to disclose said information and the claim was therefore admissible. On the merits of the claim, in accordance with the IBA Rules and more specifically the ICC Note to Parties on the conduct of arbitration under the ICC (the ICC Note), the Court sought to apply different standards of disclosure depending on whether the arbitrator is a member of a law firm or barristers’ chambers. Following the distinction set by the ICC Note, the Court held that the disputed circumstances did not fall within the scope of the arbitrator’s duty to disclose, pursuant to the ICC Note. Regarding the violation of the French international public policy, the Court took the opportunity to remind practitioners that a violation of the forum’s overriding mandatory provisions does not, in and of itself, constitute a valid ground for annulment unless it also violates French international public policy. Written by Julie Spinelli, partner at Le 16 Law (with the assistance of Anaïs Leray, intern at Le 16 Law).