Amendment No. 4 concerns the replacement of "in compliance with" with "if required to do so by". "In compliance with any directions given by immigration officers" is the phrase used in the Bill. If a direction is given, it must be complied with. The phrase, "if required to do so by," has the same meaning. If an immigration officer does not give a direction, there is no failure on the part of the carrier to adhere to the duty cast on him by the section. An immigration officer will only give a direction when he or she chooses. The meaning of the two phrases is the same.