In international arbitration, the arbitrator should be impartial and independent when rendering an arbitral award. This is especially important considering the fact that parties lack judicial protection in arbitral proceedings. To avoid challenges to arbitral awards based on an arbitrator’s evident partiality, many arbitral institutions require arbitrators to disclose a relationship with related parties. This is because challenges to arbitral awards based on an arbitrator’s evident partiality necessarily invite courts to review the arbitral awards.
Seung-Woon Lee, ARBITRATOR’S EVIDENT PARTIALITY: CURRENT U.S. STANDARDS AND POSSIBLE SOLUTIONS BASED ON COMPARATIVE REVIEWS, 9 Arb. L. Rev. 159 (2017).