Conditional GST exemption on long term lease requires industrial use and creates joint liability for tax and penalties on misuse. The notification amends the earlier entry by substituting a lower numeric figure and replacing the exemption clause with provisos that make the exemption conditional on use of leased plots for allotted industrial or financial activity, require State Government monitoring and enforcement, impose joint and several liability on original and subsequent lessors/lessees/buyers/owners for tax, interest and penalty if land use changes or violations occur, and mandate inclusion of the exemption condition in lease, sub lease and sale agreements.