Signing up an apprentice is usually done through an Australian Apprenticeship Centre, such as CVGT. A representative from the centre will come out to your site and go through the training contract, wages and incentives with you and your apprentice. If the apprentice is under the age of 18 they will need to have a parent or guardian with them when signing the contract. For regional sign ups you can use AUSNAC. The same process will apply.