25B [Definition of fundamental breach: substantial deprivation of expectation];

29B [Written contract may require writing for modification or termination];

35A ; 35B [Conformity of the goods: quality, quantity and description required by contract; Requirements implied by law];

71A [Anticipatory breach (apparent that a party will not perform a substantial part of obligations: grounds for suspension by other party];

72A ; 72D [Avoidance prior to date for performance: when clear that party will commit fundamental breach; Party has declared it will not perform: no need for advance notice under art. 72(2)];

75A1 [Damages established by substitute transaction after avoidance: resale by aggrieved seller];

80A [Failure of performance caused by other party]