Specified debentures under section 80L: secured taxable bonds issued by Steel Authority of India Limited treated as specified instruments. Central Government designates certain debentures issued by the Steel Authority of India Limited as specified debentures under the Income-tax Act. The instruments are secured, redeemable, non-convertible bonds of fixed denomination, carry a stated rate of interest payable half-yearly, are issued in a contiguous series of distinctive numbers, and are specified for the purpose of the relevant tax provision permitting such designation.