4B [Scope of Convention (issues excluded): penalty clauses];

26A1 [Effective declaration of avoidance: notice to the other party required];

47A [Buyer's right to fix additional period for avoidance];

49A21 [Buyer's right to avoid contract (grounds for avoidance): seller does not deliver or refuses to deliver within additional period set under art. 47];

51A1 [Delivery or conformity of only part of goods: rules of arts. 46-50 apply to part missing or non-conforming];

81C [Effect of avoidance on obligations: restitution by each party of benefits received]