If you are coming to study in Australia, you are eligible to bring your family members with you. You can either include them on your original student visa application or you can apply for their visas once you have started your course in Australia. Spouses, partners and unmarried children under the age of 18 are eligible for dependent visas.
If you are including your dependent family members in your original student visa application, then you must include their details on your original Form 157A. The main student visa holder must have a minimum of 12 months validity on the visa and necessary funds and insurance to cover all expenses for this period.