What is the ruling on the annual financial return resulting from authorizing a company to rent out a chalet one owns for one week annually, after deducting its cost and commission, knowing that the personal use of the chalet is for recreation with the family, free from prohibitions and doubts?

The timeshare system involves owning the property (raqabah) or usufruct (manfa'ah) of a residential unit for a specific period annually. It is permissible in Islamic law if it fulfills the conditions of sale (bay') or lease (ijarah). If it involves owning both the property and its usufruct, it is a sale. If it involves owning only the usufruct, it is a lease. The unit must be existing, owned, and clearly identified in a sale, and its duration must be known in a lease, along with the price or rent being known in both cases.