Any such oil and gas lease may provide, or said board by subsequent contract may agree, that the lessee and his assigns shall have the right and power to consolidate the land covered by said lease with other adjoining land for the purpose of joint development and operation of the entire consolidated premises as a unit, in which event the lessor of such lease shall share in the royalty on oil and gas produced from said consolidated tract in the proportion that the area of the land covered by such lease bears to the total area of said consolidated tract.
SDCL 13-24-6