Capital gains exemption on transfers to Special Economic Zone depends on reinvestment in specified new assets within a statutory window. Exemption of capital gains is provided where assets used in an industrial undertaking in an urban area are transferred in consequence of shifting the undertaking to a Special Economic Zone, conditional on purchase, acquisition, construction, transfer of establishment, or specified expenditure on new assets within the statutory window; shortfalls between capital gains and new asset costs are taxable, equality or excess negates tax, and deposited unutilised amounts treated as cost and subject to charge if not used within the period.