Interest and penalty waiver for specified GST demands depends on full tax payment and withdrawal of pending appeals. Waiver of interest and penalty is available for certain section 73 demands relating to the period from 1 July 2017 to 31 March 2020, if the full tax amount in the relevant notice, statement, or order is paid by the notified date. The provision treats the related proceedings as concluded, subject to prescribed conditions, and extends in specified cases involving section 74 notices and later appellate or revisional orders. The waiver does not apply to erroneous refund amounts or to pending appeals or writ petitions not withdrawn by the notified date.