Section 4(2)(b) in Tamil Nadu Impartible Estates Act, 1904
(b)to grant mining or quarrying leases for terms not exceeding sixty years and leases of the pannai or home farm lands for terms not exceeding fifteen years, provided that every such lease -(i)shall be by registered deed and shall be made to take effect in possession not later than twelve months after its date;(ii)shall reserve the best rent that can reasonably be obtained, regard being had to any money laid out or to be laid out by the lessee for the benefit of the estate, but not to any fine or premium paid or to be paid in consideration of granting such lease;(iii)shall contain a covenant by the lessee for payment of rent and a condition of re-entry on the rent not being paid within a time therein specified not exceeding three months;(iv)if a mining or quarrying lease, may make the rent ascertainable by or to vary according to the acreage worked, or by or according to the quantities of any mineral or substance gotten, made merchantable, converted, carried away, or disposed of in or from such estate, or any other land, or by or according to any facilities given in that behalf, and may reserve a fixed or minimum rent with or without power for the lessee, in case the rent according to acreage or quantity in any specified period does not produce an amount equal to the fixed or minimum rent, to make up the deficiency in any subsequent specified period, free of rent other than the fixed or minimum rent;