Special tax rate on specified income bars deductions, allowances, and loss set-offs in computing taxable income. Income referred to in sections 102 to 106 is taxed at a special rate where it is included in the returned income or determined by the Assessing Officer. The tax payable is computed by applying the specified rate to that income and adding the tax on the remaining total income after excluding it. No deduction for expenditure or allowance and no set-off of loss is allowed in computing such income.