A co-shareholder gifted their share of an undivided immovable property to a third party without giving notice to other co-shareholders. This action is being questioned because a registered Will stipulated that one month's notice must be given to co-shareholders before any sale of a share to a third party. The executor of the Will believes the property should not be transferred outside the existing co-ownership, and the core legal query is whether gifting the share, rather than selling it, bypasses the notice requirement outlined in the Will.