Case comments are among the most popular features of the ICSID Review—and we are delighted to have published a new comment by Mahnaz Malik. Her focus is on Deutsche Lufthansa AG v Bolivarian Republic of Venezuela, specifically a recent decision by the Secretary-General of the Permanent Court of Arbitration that accepted Venezuela’s challenge to the claimant’s appointed arbitrator. Read the case comment for insights into how this noteworthy decision sits among the established caselaw on arbitrator challenges.