Section 20B(3) in The Slum Areas (Improvement And Clearance) Act, 1956
(3)Where any such building is let to a tenant in pursuance of a direction issued under sub-section (4) of section 20A, the tenant shall, notwithstanding any law relating to the control of rents in force in the area, be liable to pay to the owner—(a)if any work of improvement has been executed in relation to the building, an annual rent of a sum equivalent to the aggregate of the following amounts, namely:—(i)the annual rent the tenant was paying immediately before he vacated the building for the purpose of execution of the work of improvement;(ii)six per cent. of the cost of the work of improvement; and(iii)six per cent. of a sum equivalent to the compensation payable in respect of any land which may have been acquired for the purpose of effecting such improvement as if such land were acquired under section 12 on the date of the commencement of the work of improvement;(b)if the building has been re-erected, an annual rent of a sum equivalent to four per cent. of the aggregate cost of reconstruction of the building and the cost of the land on which the building is re-erected.Explanation.—For the purposes of this clause, the cost of the land shall be deemed to be a sum equivalent to the compensation payable in respect of the land if it were acquired under section 12 on the date of the commencement of the reconstruction of the building.