Article 285 of Civil Code

If the subject matter of the obligation is the transfer of a right in rem over a thing specified by its kind, and the debtor has not set apart a thing of that same kind owned by him, the creditor may obtain a thing of that kind at the debtor's expense after obtaining the judge's permission, or without his permission in a case of urgency. He may also claim the value of the thing, without prejudice, in either case, to his right to compensation if there are grounds for it.