S. 28(i) : Business income-Civil contractor-Transfer of development rights-Income earned from project assessable as business income-Estimation of 10% of gross receipts is held to be justified-When income is estimated specific disallowance u/s. 40A(3) cannot be made-The transfer definition cannot be applied to on transfer development rights which is a business asset-Income taxable on performing certain obligations [S. 2(47)(v), 40A(3), Transfer of Property Act, 1882, S.53A]