Section 31(3)(a) in Karnataka Slum Areas (Development) Act, 1973
(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 amount payable in respect of any land which may have been acquired for the purpose of effecting such improvement;