My graduate student is going alone on a trip to Australia to do research and I have a question about customs. Flying from LAX into SYD and then on to CBR on the same airline same ticket. Will she need to clear customs in SYD or CBR. They have a layover of 1 hour in Sydney is this enough time. I am a very nervous mom so I just want to ensure she has as smooth a trip as possible. Any input would be appreciated!