Customs preventive control - CBEC's Customs Manual 2023 - Customs

7. Customs preventive control: 7.1 No vessel/aircraft can leave a Customs station unless a written order for port clearance is given by the proper officer of Customs. This permission for departure is given subject to the satisfaction of the proper officer that all the prescribed formalities have been fulfilled, duties/penalties etc., have been paid or secured. 7.2 The Preventive Officers of Customs are authorized to board the vessels/aircrafts to take suitable declarations, crew property list etc., and to check whether there are any goods which are not declared for unloading at a particular Customs station in the IGM with intention to smuggle them without following the prescribed formalities and payment of duties. A thorough examination and checking of the vessels/aircrafts - known as rummaging - is also undertaken on selective basis taking due note of the past history of the vessels, the port/airport from which these are arriving, the intelligence report etc. 7.3 The Preventive Officers of Customs also keep a very careful vigil for checking any illegal activities and develop intelligence to guard against any possible attempts of unauthorized removals from the docks, unloading of un-manifested cargo etc.