1. If the classes of pre-emptors differ, pre-emption shall belong to the one who shares with the seller of the pre-empted immovable property in the fixed share of inheritance. If they waive their right, it shall pass to the heir who does not share in the fixed share of inheritance. If they waive their right, it shall pass to the legatee. If they waive their right, it shall pass to the foreign co-owner. 2. Each of these shall join the one succeeding them in their right of pre-emption, but not vice versa. The heir of each of them shall take their place in their entitlement to pre-emption and in joining the one succeeding them in their right of pre-emption.
Interpretation and application must be checked against the official text and current version.