Interest on delayed refunds: claimants must file within the prescribed filing period from Public Notice issuance. Claims for interest on delayed deemed export refunds must be filed in the prescribed Aayat Niryat form within a 90-day period: for cases approved on or after 1 April 2007 up to 29 April 2008, the 90 days run from 29 April 2008 (date of the Public Notice); for fresh cases the 90 days run from the date of issue of the refund cheque.