Tax exempt secured redeemable non convertible bonds specified, with exemption contingent on holder registration with issuer. Central Government specifies 10 year 9 per cent tax free Secured Redeemable Non Convertible Bonds (C series) issued by the National Hydroelectric Power Corporation Limited as qualifying for exemption under the relevant item of section 10 of the Income tax Act. The exemption is conditional on the holder registering his name and holding with the Corporation, establishing a procedural eligibility requirement for claiming the tax benefit.