Additional depreciation is available for new plant and machinery...

Additional depreciation is available for new plant and machinery installed in captive and wind power-generation facilities where the statutory conditions are met. Electricity is movable property capable of transmission, transfer, delivery and possession; it therefore constitutes an article or thing, and its generation amounts to production. Eligibility also arises where an assessee engaged in manufacturing uses the generated power in its manufacturing operations. Revisional jurisdiction cannot be exercised unless the assessment order is both erroneous and prejudicial to the interests of the Revenue. A correct allowance of additional depreciation satisfies neither condition and cannot support revision.