In this case you should contact the Scholarships Unit to discuss your situation. Normally the answer is 'No'. All these enquiries must be individually assessed. Should you believe you require additional assistance, please contact the Scholarships Unit. AusAID does not cover such courses.
Different providers have different conditions.
Scholarship extensions are never guaranteed. The 'Family Entry Application' process can be delayed due to the processes involved. Recently, DIMA introduced a Health Check requirement that includes X-rays as well receiving a 'clean bill of health' from nominated health clinics. DIMA also conducts character and financial checks of those applying. Also, certain countries require their own government clearances.