Arbitration analysis: In a decision dated 12 July 2023 published on 1 September 2023, the Swiss Federal Supreme Court (‘SFSC’) considered whether to refer parties to arbitration pursuant to Article II(3) of the New York Convention (‘NYC’) following the dismissal by the lower state courts of a jurisdictional objection based on an arbitration agreement which provided for institutional arbitration in Russia. Since the Russian arbitral institution referred to in the arbitration agreement had ceasefartd to exist, the central question was whether such agreement could be interpreted as providing for ad hoc arbitration in Moscow, as argued by the defendant. After examining the validity of the arbitration agreement under Russian law, the SFSC upheld the decision of the first instance and superior courts dismissing the arbitration defence. The SFSC first examined the question of the law applicable to the validity of the arbitration clause and held, in line with its earlier case law (SFSC 5C.215/1994 of 21 March 1995 cons 2b; cf also SFSC 4A_279/2010 of 25 October 2010 cons 2) that the question whether an arbitration agreement was "null and void, inoperative or incapable of being performed" within the meaning of Article II(3) of NYC had to be determined according to the national law chosen by the parties or the national law at the seat of arbitration, based on an application of Article V(1)(a) of NYC by analogy, and not on the basis of an autonomous interpretation of the NYC nor on the lex fori (in casu Swiss law). The SFSC indeed recalled that Article II(3) of NYC did not provide a substantive rule to assess the validity of the arbitration agreement and that its terms had to be interpreted in light of the law applicable to the arbitration agreement. In the case at hand, since the parties had chosen Moscow as the seat of the arbitration and had not made a choice of law for their arbitration agreement (the parties had agreed on Russian law as the substantive applicable law for the main contract only), the SFSC held that arbitration agreement had to be interpreted, and its validity assessed, in light of Russian law. The SFSC thus upheld the decision of the lower courts which had found, following a detailed analysis of the Russian law provisions and case law, that the arbitration agreement had to be interpreted according to its wording and that, based on such literal interpretation, it was clear that the parties had intended to resort to arbitration before a specific Russian arbitral institution (which however no longer existed) and not to ad hoc arbitration. The SFSC decision is a reminder of the importance of the seat of the arbitration as well as the substantive law (and case law) applicable to the arbitration agreement, since both factors will have significant consequences on the interpretation and validity of an arbitration agreement. Written by Alexandra Johnson, partner at Pestalozzi attorneys at Law and Mery Canella, associate at Pestalozzi Attorneys at Law.