Lawyers involved in international commercial transactions know well that unforeseen events affecting the performance of a party often arise. Not surprisingly, exemptions for non-performance are dealt with in a significant number of arbitral awards. This very useful book thoroughly analyzes contemporary approaches, particularly as manifested in case law, to the scope and content of the principles of exemption for non-performance which are commonly referred to as è^-force majeureè^- and è^-hardship.è^- The author shows that the è^-general principles of lawè^- approach addresses this concern most effectively.