4A.15.4
Each shipping bill shall be valid for exports only through the Customs House located at the place where the office of the nominated agency/Status Holder/ exporter concerned is situated.
It shall be valid for shipment for a period of seven days including the date on which the endorsement was made by the nominated agency in case of exports through nominated agency. If the exports cannot be made within this period, the exporter shall file a fresh shipping bill.