From 17th April 2019, the sponsor will need first to lodge their sponsorship application and be approved; Then the partner visa can be submitted. Lodging a valid visa whilst the applicant is in Australia may allow the visa applicant to obtain a Bridging Visa and Medicare; A Brodiging visa generally allows applicants to stay in Australia while their new visa application is being processed. No bridging visa will be issued while the sponsorship application is under process.
If you are planning to apply for a Partner visa under current system you can book an appointment here:
Schedule an Appointment