Waiver of interest and penalty for specified past GST demands where outstanding tax is paid by the notified date. A new provision grants conditional waiver of interest under section 50 and penalty for specified section 73 demands for the 2017-2020 period where the full tax stated in the notice, statement or order is paid by a government notified date, deeming proceedings concluded subject to prescribed conditions; exclusions include erroneous refunds and pending appeals not withdrawn, additional tax ordered on appeal must be paid within three months, and previously paid interest or penalty is non refundable.