Section 54EC exemption: invest in notified long-term bonds, including NHAI, REC and HUDCO bonds, to secure capital gains relief. Exemption under section 54EC requires investment of capital gains in bonds issued by specified public entities, including National Highway Authority of India bonds, Rural Electrification Corporation bonds, and any other bonds notified by the Central Government; HUDCO bonds redeemable after the prescribed holding period have been notified as a long-term specified asset for section 54EC purposes.