THE Bureau of Immigration (BI) has urged all departing international travelers to be at the airport four hours before their flight in wake of heightened security measures implemented in the airports while the country is under a state of lawlessness. Immigration Commissioner Jaime Morente on Tuesday said the advisory will give the passengers ample time to go through security baggage checks, check in at their airline counters and submit themselves to boarding formalities and inspection by immigration officers. It takes an average of 45 seconds for an immigration officer to process a departing passenger. Processing time, however, could take longer if the immigration officer deems it necessary to refer a passenger for secondary examination by members of the BI’s Travel Control and Enforcement Unit (TCEU). The TCEU may decide to defer a passenger’s departure pending compliance with certain requirements.