The buyer shall lose his right to rely on lack of conformity with the contract at the expiration of a period of one year after he has given notice as provided in Article 39, unless he has been prevented from exercising his right because of fraud on the part of the seller.

After the expiration of this period, the buyer shall not be entitled to rely on the lack of conformity, even by way of defence to an action. Nevertheless, if the buyer has not paid for the goods and provided that he has given due notice of the lack of conformity promptly, as provided in Article 39, he may advance as a defence to a claim for payment of the price a claim for a reduction in the price or for damages.