64. Save where general permission is given under section 67 or with permission in writing of the appropriate officer, no goods other than passengers' baggage or ballast urgently required to be loaded for the vessel's safety, shall be shipped or water-borne to be shipped or discharged from any vessel, in any customs-port, nor any goods except passengers' baggage shall be loaded in or unloaded from any conveyance other than a vessel at any land customs-station or customs-airport except in the presence of an officer of Customs.