Specification of HUDCO Capital Gains Debentures under section 54E enables designated investment to qualify for capital gains exemption. The Central Government, under Explanation 1(d) to sub section (1) of 54E of the Income tax Act, specifies the three year HUDCO Capital Gains Debentures as a qualifying instrument for the purposes of that clause, thereby identifying that security by name as an eligible form of investment for the provision's treatment.