1. If the usurped property changes naturally without intervention, the party from whom it was usurped has the option between recovering the usurped property or its substitute. 2. If the usurped property undergoes a transformation such that it becomes a different thing, the usurper shall be liable for its substitute. 3. If the usurped property is altered by an addition made by the usurper from their own property, the party from whom it was usurped shall have the choice between paying the value of the addition and recovering the usurped property in kind, or holding the usurper liable for its substitute. 4. If the usurped property changes due to a decrease in its value as a result of the usurper's use, the usurper shall return the property in kind along with liability for the decrease in value.
Interpretation and application must be checked against the official text and current version.