Tax exemption for north-eastern industrial undertakings: profits excluded from total income for a ten-year period, opt-out allowed. Profits of an industrial undertaking commencing manufacture in specified Integrated Infrastructure Development Centres or Industrial Growth Centres in the North Eastern Region are excluded from total income for ten consecutive assessment years, subject to conditions preventing formation by splitting or transfer of used machinery. Computation adjustments treat deductions under sections 32, 35 and clause (ix) of section 36 as having been fully allowed, prohibit carryforward of losses related to the undertaking, disallow specified section 80 deductions for the exempted profits, and require WDV for depreciation to be computed as if depreciation had been claimed and allowed; an assessee may opt out by prior written declaration.