law: Custom Act, 1962 
  40.
  
  Export Goods not to be loaded Unless Duly Passed by Proper Officer. – 
  The
  
  person-in-charge of a conveyance shall not permit the loading at a customs
  
  station –
  (a)
  
  of export goods other than baggage and mail bags, unless a shipping bill or
  
  bill of export or a bill of transhipment, as the case may be, duly passed by
  
  the proper officer, has been handed over to him by the exporter;
  (b)
  
  of baggage and mail bags, unless their export has been duly permitted by the
  
  proper officer.