As regards paragraph (a), there is an obligation on someone bringing a ship to Ireland to ensure that all persons on the ship who are seeking to land in Ireland or to pass through a port here to travel somewhere else disembark in accordance with directions given by immigration officers. That means they cannot loiter in the boiler room until after midnight when all the other passengers have gone and that they must pass through channel A or B if an immigration officer says that is the way they should go.