S. 80IA: Industrial undertakings-Infrastructure development-Restricting the deduction by notionally brought forward losses and depreciation relating to the eligible undertaking pertaining to years prior to the initial assessment year, even though such losses and depreciation had already been set off against other business income in those earlier years, was unjustified-Section 80-IA(9) does not affect the computation of deductions available under other provisions falling under Heading āCā of Chapter VI-A . [S.80HHC, 80IA(5), 80IA(9), 80IB]