When US sanctions applied to Charterers, Owners invoked the force majeure clause of the COA. Charterers started arbitration and the Tribunal found that Owners’ refusal to accept payment in € instead of $ was a failure to exercise “reasonable endeavours” specified for reliance on the force majeure clause. The Court overruled the Tribunal, finding that the “drastic impact of sanctions” would not be limited to the payment aspect but involve further “penalties” for continuing to perform a contract with a sanctioned party. Those problems would not have been overcome by payment in €, so the “reasonable endeavours” provision did not oblige Owners to accept non-contractual performance and Owners were not precluded from reliance on the clause.