CA Gov't Code Section 50304

The economic utility of the property to the user for the purpose to which it is suited is the prime factor in determining the reasonableness of the charge. For example, in a lease for grazing livestock, the prime factor is the value of the forage to the livestock producer, considering the number of livestock the property reasonably will support when used so as to conserve it as a grazing resource and the monetary return to the livestock producer by such use of the property.