Article 893 of Civil Code

a) If the sale is conducted by public auction in accordance with procedures prescribed by law. b) If the sale takes place between ascendants and descendants, between spouses, or between relatives to the second degree. c) If the pre-emptor expressly or implicitly manifests his intention, at or before the sale, that he does not wish to purchase on the terms on which the sale was concluded. 2 - A waqf may not exercise pre-emption.