law: Custom Act, 1962 
  30.
  
  Delivery of Import Manifest or Import Report. – 
  (1)
  
  The person-in-charge of a vessel or an aircraft carrying imported goods shall,
  
  deliver to the proper officer, an import manifest, and in the case of a
  
  vehicle, an import report, within twenty-four hours after arrival thereof at a
  
  customs station in the case of a vessel and twelve hours after arrival in the
  
  case of an aircraft or a vehicle, in the prescribed form: Provided that,- 
  (a) in the case of a vessel or an aircraft, any such manifest may be
  
  delivered to the proper officer before the arrival of the vessel or aircraft;
  (b) if the proper officer is satisfied that there was sufficient cause
  
  for not delivering the import manifest or import report or any part thereof
  
  within the time specified in this sub-section, he may accept it at any time
  
  thereafter.".
  (2)
  
  The person delivering the import manifest or import report shall at the foot
  
  thereof make and subscribe to a declaration as to the truth of its contents.
  (3)
  
  If the proper officer is satisfied that the import manifest or import report is
  
  in any way incorrect or incomplete, and that there was no fraudulent intention,
  
  he may permit it to be amended or supplemented.