Is it permissible for the guardians of one-third of the grandfather's inheritance, designated for charitable deeds, to rent out the grandfather's properties so that the charitable deeds may continue, especially given the current impossibility of finding an agent, and is it necessary to have a power of attorney from all heirs to finalize rental contracts, and is it permissible to authorize the grandmother to receive this one-third and distribute it while the guardians continue their oversight?

There is no objection to renting out one-third of the properties until an agreement is reached on an agent to manage the grandfather's and father's estates. The heirs must be informed of this, because the bequest pertains to an undivided one-third share. The heirs may agree to designate a specific one-third share for the execution of the bequest, by referring the matter to the court. There is no impediment to handing over the grandfather's one-third share to the grandmother, provided that the executors monitor the expenditures. If there is a breach of the will, the money should not be given to her, and the heirs should agree on an overseer, or the court should appoint one.