At present your application is undergoing routine processing. Unfortunately, ensuring all the legal requirements are met including meeting all checks in relation to an application can take some time. I cannot give you a time frame.
I will be following up on the status of your application on a regular basis to ensure it is being processed as soon as practicable. You will be contacted if we require additional information to process your application.
All non-citizens applying for visas to enter Australia are considered on an individual basis and against legal requirements set out in Australia's migration legislation. This often includes requirements that applicants undertake and meet (where relevant) health, character and national security checks that are undertaken by other agencies; and this can take some time. It can take several months to gain the necessary information from other agencies.
The timing for completion of the checks varies from one case to another, depending on the individual circumstances. Unfortunately I am unable to provide you with a definitive time-frame for finalization of this application. You can be assured, however, that the assessing officer will do all he can to ensure that the application is finalized as quickly as possible.