Mining Leases Act 1723

Two fifths of the rent to tenant for life not dispunishable of waste:

the other 3 to those in remainder in whom inheritance.

II. Provided always, That where any such lease shall be made by any tenant for life not dispunishable of waste, with immediate remainders to his or her first and every other son in taile, two fifth parts of the yearly rent to be reserved thereupon shall be be made payable to the tenant for life, and the other three fifth parts of such rent to the person and persons in remainder, in whom the inheritance of the mines comprized in such lease shall from time to time happen to be vested, during the time such inheritance shall continue vested in him and them respectively.