8 Provision as to mining leases.S+N.I.
In a mining lease—
(i)The rent may be made to vary according to the price of the minerals or substances gotten, or any of them:
(ii)Such price may be the saleable value, or the price or value appearing in any trade or market or other price list or return from time to time, or may be the marketable value as ascertained in any manner prescribed by the lease (including a reference to arbitration),or may be an average of any such prices or values taken during a specified period.