81. (1) On and from the date of coming into force of the whole of this Part in any area, there shall, within that area, be only one class of holders of agricultural land, namely, maliks, and the rights and liabilities of every such land-holder shall be regulated by the provisions of this Part: Provided that nothing in this section shall confer on any such malik any right to any interests in the sub-soil including rights to minerals in his holding: Provided further that when the Government lease out any land for any particular period, the rights and liabilities of such a lessee shall be governed by such terms and conditions as may be set forth in the lease.