You must have a Hull Identification Number (HIN) - also known as SA's Boat Code identification system - to register a boat in South Australia.
Boat code involves fixing a set of small plates bearing a unique Hull Identification Number (HIN) to the hull of a vessel as a security measure. HIN plates can only be issued and affixed by an appointed boat code agent.
Boat code is compulsory for all recreational vessels being registered for the first time or when vessels change ownership.