Section 11(9) in The Arbitration And Conciliation Act, 1996
(9)In the case of appointment of sole or third arbitrator in an international commercial arbitration, [the arbitral institution designated by the Supreme Court] [Substituted 'the Supreme Court or the person or institution designated by that Court' by Act No. 33 of 2019, dated 9.8.2019.] may appoint an arbitrator of a nationality other than the nationalities of the parties where the parties belong to different nationalities.