If you want to stay in Australia for a longer period of time than what you are allowed to stay on your original visa, you must apply for another visa of the same type or another type of Australian visa. The length of time you can stay in Australia depends on the type of visa you are applying for, and if the word “no re-application” is written on your visa, you cannot reapply for your new visa from Australia and you must within a certain period of time. Leave Australia.