Capital gain exemption for industrial shifting: reinvestment in qualifying assets secures relief subject to timing and retention rules. Section 54G allows exemption from capital gain tax when assets transferred to effect the shift of an industrial undertaking from an urban area are replaced by purchase, construction, acquisition, relocation of original assets, or specified notified expenses in the receiving area within the statutory pre and post transfer periods; the relief is limited to the lower of the capital gain or cost/deposit for the new asset, and a transfer of the replacement asset within the restricted holding period reduces its cost of acquisition by the exempted gain.