CISG Article 82 ULIS Article 79
1. The buyer loses the right to 1. The buyer shall lose his
declare the contract avoided right to declare the contract
or to require the seller to avoided where it is impossible
deliver substitute goods if it is for him to return the goods in
impossible for him to make the condition in which he
restitution of the goods received them.
substantially in the condition
in which he received them. 2. Nevertheless, the buyer may
declare the contract avoided:
2. The preceding paragraph
does not apply: (a) if the goods or part of
the goods have perished
(a) if the impossibility of or deteriorated as a result
making restitution of the of the defect which
goods substantially in the justifies the avoidance;
condition in which the
buyer received them is (b) if the goods or part of the
not due to his act or goods have perished or
omission; deteriorated as a result of
the examination prescribed
(b) if the goods or part of the in Article 38;
goods have perished or
deteriorated as a result (c) if part of the goods have
of the examination been consumed or transformed
provided for in article 38; by the buyer in the course of
or normal use before the lack
of conformity with the
(c) if the goods or part of the contract was discovered;
goods have been sold in the
normal course of business (d) if the impossibility of
or have been consumed or returning the goods or of
transformed by the buyer in returning them in the
the course of normal use condition in which they were
before he discovered or received is not due to the act
ought to have discovered of the buyer or of some
the lack of conformity. other person for whose
conduct he is responsible;
(e) if the deterioration or
transformation of the goods
is unimportant.
Modifications to ULIS Article 79 include:
- Insertion of the phrase "or to require the seller to deliver substitute goods" after the CISG 82(1) word "avoided" (to underline the fact that the buyer has an option to require delivery of substitute goods (Article 46(2): If the buyer exercises that option, he must return the first delivery of goods, but restitution is not made in any other respect);
- Insertion of the phrase "have been sold in the normal course of business" before the CISG 82(2)(c) phrase have been consumed or transformed (thereby permitting avoidance of the contract also where the goods had been resold, and considerably widening the scope of the exceptions);
- Insertion of the CISG 82(c) phrase "or ought to have been discovered after the word "discovered" (to achieve the desired degree of objectivity regarding the discovery of a lack of conformity);
- Fusing of ULIS 79(2)(d) into CISG 82(2)(a) (as both dealt with the same type of case);
- Elimination of the ULIS 79(2)(e) "de minimis" clause (regarded as unclear from whose point of view -- buyer’s or seller’s -- the unimportance was to be measured);
- Amendment of the main rule by adding in CISG 82(1) and (2) a requirement that it be impossible for the buyer to make restitution of the goods "substantially in the same condition in which he received them (view expressed that goods ceased to be "substantially" in the same condition at the point when their condition had changed to such an extent that, even though the seller had committed a fundamental breach of contract, it was unreasonable to require him to take them back).
Leser in Commentary on the UN Convention on the International Sale of Goods, Peter Schlechtriem ed. (Oxford 1998) 643-644 [citations omitted].