How are the expenses (Nafaqah) of an endowment determined?

Primary text

The expenses of the endowment are determined according to the founder's stipulations, as the founder's condition regarding the distribution of benefit must be followed regarding its maintenance. If the founder set no stipulation, the expenses are covered from its yield (Ghalla). This is because the endowment necessitates preserving its principal and distributing its benefit, which is unattainable without expenditure; thus, this expense is necessary. If an endowed animal's utility becomes suspended, its maintenance falls upon the beneficiary, as it is considered their property.