Requirements for a visa to Australia
If the child is not eligible for Australian citizenship by descent, or the parent chooses not to apply on the child's behalf for Australian citizenship, the parent will need to apply for a visa for the child to enable the child to enter and remain permanently in Australia.
In international surrogacy cases where the intended parent is a biological parent, and is also an Australian citizen, permanent resident or eligible New Zealand citizen, a Child (subclass 101) visa is the relevant visa for the child. Eligibility requirements for this visa are available on the Department's website. In most cases a DNA test will be requested as evidence of a biological link between the child and the sponsoring parent.
See: Child (subclass 101) visa