The steps you will need to take to become an authorised microchip implanter will vary depending on which State you live in.
In most cases registered veterinarians will be the only persons qualified to conduct the implanting of microchips for the purpose of identifying companion animals and assist in animal control.
There are some States, such as New South Wales and Queensland, who allow individuals, other than registered veterinarians, to obtain the necessary qualifications to legally implant microchips.