World of Embassy

If you intend to stay in Australia for three months or less, no application processing fee is payable. However an application to extend your stay after arrival will cost A$135.
A US$24 or CAN$30 processing fee must also accompany an application for a visitor visa where the intended stay in Australia is more than three months. Visas in this category may authorize a stay for up to an additional three months. Any further extension will cost A$135. Longer stay visas are normally for 3-6 months stay

Visas generally allow for multiple entries for a twelve month period. For the same processing fee of US$24, or CAN$30, you can apply for a visa valid for four years (or the life of your passport if this is less than four years). You will then not have to reapply for a visa each year you wish to visit Australia in the next four years.

Visa Application :-

The application form must be signed by the applicant personally. All persons traveling on their own passport must complete an application form. Each passport holder will be Issued with their own visa. Children under I8 years of age must provide their birth certificate showing both parents. Any parent listed on the birth certificate who is not a visa applicant along with the child, must provide notarized consent to the child traveling Or evidence that they will accompany the child (travel bookings and notarized copy Australian or NZ passport or valid visa for Australia.

Click Here For
Official Site