"Maintaining a valid visa You have been granted a temporary visa and will become eligible for consideration for the grant of a permanent visa. You do not need to make a further application for the permanent visa. Generally, applicants become eligible two years after the date of the lodgement of the combined application. Shortly before that date, the Department will write to you and invite to provide further information. There are no travel restrictions associated with your temporary visa. If you wish to travel outside Australia pending a decision on your permanent visa application, please ensure that you advise the Department of your contact details as failure to respond to requests for information can lead to a refusal of your application and the ceasing of your current visa"
Sorry just found this on immi info document.